Subject: Re: [Shop-talk] More compressor questions

From: Pat Horne <[email-masked]>
Date: Tue, 10 Aug 2021 13:38:51 -0500

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Good questions. I think it all depends how much you are going to use it & ho=
w reliable it NEEDS to be.=20

As to what hp rating, I suspect with the CFM & pressure being equal that the=
 main difference is how much headroom the motor has. If the motor is running=
 at or near capacity it won=E2=80=99t last as long.=20

If you are using lots of air & your budget allows,  consider a 2 stage compr=
essor.=20

I had a small oil less compressor that I used on job sites it worked fine un=
til one day it just started running longer, then pressure dropped. The pisto=
n seal died. I purchased an oil lubricated unit to replace it.=20

If you are mainly using air tools & not painting, I=E2=80=99d go with oil. M=
ost of my usage is air tools & media blasting. When we needed to paint a veh=
icle we just added an oil separator & filter. Worked fine.=20

Peace,
Pat

Pat Horne=20
We support Habitat for Humanity

On Aug 10, 2021, at 1:25 PM, John T. Blair <[email-masked]> wrote:

=EF=BB=BF=20
Thanks again for all the replies to my original post about my compressor mot=
or
not working.

With all this going on, I have been doing some thinking about having to buy a=
 new =20
compressor if I can't get this motor running.  That said, this compressor ap=
pears=20
to come with a 3hp, 4hp, and 5hp motor.  I have the 5hp.  I know that when i=
t
comes to getting a new compressor, bigger is better, to the extent of your b=
udget. =20

1. What is the advantage of the different hp motors.  I know the big advanta=
ge
for the 5hp is it runs on 220V.  But how does the hp affect the compressor. =
=20
Based on the info in the manual, it appears that all 3 versions have the sam=
e=20
SCFM specs.

My current compressor is an oil lubricated one. =20

2. I see oil-less compressors that supposedly have fantastic specs for air s=
upply
that are so much cheaper than oil lubed versions.  Any thoughts?

3.  Any body have an oil-less compressor?  How do you like it?  I was readin=
g an
article that was talking about how the oil-less versions have come a long wa=
ys. =20
They were saying that the biggest advantage for the oil liubes was for high a=
ir
demand over a long time like in a commercial shop.  But my dad's compressor,=

a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil lubed.  We go=
t dad's
compressor back in the 60s and it was still running when he passed in 2015. =
 I=20
bought mine back about '90.  So I lean toward them.  But is that realistic?

John

 =09
This email has been checked for viruses by Avast antivirus software.=20
www.avast.com

John T. Blair  WA4OHZ     email:  [email-masked]
Va. Beach, Va                  Phone:  (757) 495-8229

          48 TR1800    48 #4 Midget    65 Morgan 4/4 Series V (B1106)
     75 Bricklin SV1 (#0887)    77 Spitfire    71 Saab Sonett III
                       65 Rambler Classic

Morgan:    www.team.net/morgan
Bricklin:     www.bricklin.org

If you can read this             - Thank a teacher!
If you are reading it in English - Thank a Vet!!

=46rom Dennis Prager - The American Trilogy:
     e pluribus Unum, "from many, one."
     In God We Trust
     Liberty - the  power  of  choosing,  thinking,  and  acting  for=20
                  oneself; freedom  from  control  or  restriction=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Good questions. I think it all depends how m=
uch you are going to use it &amp; how reliable it NEEDS to be.&nbsp;<div><br=
></div><div>As to what hp rating, I suspect with the CFM &amp; pressure bein=
g equal that the main difference is how much headroom the motor has. If the m=
otor is running at or near capacity it won=E2=80=99t last as long.&nbsp;</di=
v><div><br></div><div>If you are using lots of air &amp; your budget allows,=
 &nbsp;consider a 2 stage compressor.&nbsp;</div><div><br></div><div>I had a=
 small oil less compressor that I used on job sites it worked fine until one=
 day it just started running longer, then pressure dropped. The piston seal d=
ied. I purchased an oil lubricated unit to replace it.&nbsp;</div><div><br><=
/div><div>If you are mainly using air tools &amp; not painting, I=E2=80=99d g=
o with oil. Most of my usage is air tools &amp; media blasting. When we need=
ed to paint a vehicle we just added an oil separator &amp; filter. Worked fi=
ne.&nbsp;<br><br>Peace,</div><div>Pat</div><div><br><div dir=3D"ltr">Pat Hor=
ne&nbsp;<div>We support Habitat for Humanity</div><div><br></div></div><div d=
ir=3D"ltr"><br>On Aug 10, 2021, at 1:25 PM, John T. Blair &lt;jblair1948@cox=
.net&gt; wrote:<br><br></div><div dir=3D"ltr">=EF=BB=BF

<font size=3D"3"><br>
Thanks again for all the replies to my original post about my compressor
motor<br>
not working.<br><br>
With all this going on, I have been doing some thinking about having to
buy a new&nbsp; <br>
compressor if I can't get this motor running.&nbsp; That said, this
compressor appears <br>
to come with a 3hp, 4hp, and 5hp motor.&nbsp; I have the 5hp.&nbsp; I
know that when it<br>
comes to getting a new compressor, bigger is better, to the extent of
your budget.&nbsp; <br><br>
1. What is the advantage of the different hp motors.&nbsp; I know the big
advantage<br>
for the 5hp is it runs on 220V.&nbsp; But how does the hp affect the
compressor.&nbsp; <br>
Based on the info in the manual, it appears that all 3 versions have the
same <br>
SCFM specs.<br><br>
My current compressor is an oil lubricated one.&nbsp; <br><br>
2. I see oil-less compressors that supposedly have fantastic specs for
air supply<br>
that are so much cheaper than oil lubed versions.&nbsp; Any
thoughts?<br><br>
3.&nbsp; Any body have an oil-less compressor?&nbsp; How do you like
it?&nbsp; I was reading an<br>
article that was talking about how the oil-less versions have come a long
ways.&nbsp; <br>
They were saying that the biggest advantage for the oil liubes was for
high air<br>
demand over a long time like in a commercial shop.&nbsp; But my dad's
compressor,<br>
a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil
lubed.&nbsp; We got dad's<br>
compressor back in the 60s and it was still running when he passed in
2015.&nbsp; I <br>
bought mine back about '90.&nbsp; So I lean toward them.&nbsp; But is
that realistic?<br><br>
John<br><br>
<br>
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/a></div>
<br>
<div>John T. Blair&nbsp; WA4OHZ&nbsp;&nbsp;&nbsp;&nbsp; email:&nbsp;
[email-masked]</div>
<div>Va. Beach,
Va&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;
Phone:&nbsp; (757) 495-8229</div>
<br>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 48
TR1800&nbsp;&nbsp;&nbsp; 48 #4 Midget&nbsp;&nbsp;&nbsp; 65 Morgan 4/4
Series V (B1106)</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; 75 Bricklin SV1 (#0887)&nbsp;&nbsp;&nbsp;
77 Spitfire&nbsp;&nbsp;&nbsp; 71 Saab Sonett III</div>
<div>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
65 Rambler Classic</div>
<br>
<div>Morgan:&nbsp;&nbsp;&nbsp;
<a href=3D"http://www.team.net/morgan" eudora=3D"AUTOURL">
www.team.net/morgan</a></div>
<div>Bricklin:&nbsp;&nbsp;&nbsp;&nbsp;
<a href=3D"http://www.bricklin.org/" eudora=3D"AUTOURL">www.bricklin.org</a>=

</div>
<br>
<div>If you can read
this&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=

- Thank a teacher!</div>
<div>If you are reading it in English - Thank a Vet!!</div>
<br>
<div> =46rom Dennis Prager - The American Trilogy:</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; e pluribus Unum, "from many,
one."</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; In God We Trust</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; Liberty - the&nbsp; power&nbsp; of&nbsp;
choosing,&nbsp; thinking,&nbsp; and&nbsp; acting&nbsp; for&nbsp; </div>
<div>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;
oneself; freedom&nbsp; from&nbsp; control&nbsp; or&nbsp;
restriction&nbsp; </div>
<br>
<br>

<span>_______________________________________________</span><br><span></span=
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From: old dirtbeard <[email-masked]>
Date: Tue, 10 Aug 2021 11:42:19 -0700

--===============1789235935519181189==

--0000000000004161f205c938dd8a

Hi John,

The oil-less compressors probably are good enough for casual use, but the
ones that I have been around were noisy, probably because they tend to have
aluminum blocks and that they tend to spin at higher RPM than the larger,
heavier cast iron oil-type compressors.

The noise they make also seems more annoying to my ear, anyway. A larger,
slower spinning pump emits noise, of course, but it does not seem as harsh
as the noise from the oil-less compressor that I have heard.

One advantage of the oil-less compressors is that they will not inject oil
into the air supply if you are spraying paint.

FYIW

best,

doug

On Tue, Aug 10, 2021 at 11:25 AM John T. Blair <[email-masked]> wrote:

> motor
> buy a new
> compressor if I can't get this motor running.  That said, this compressor
> appears
> to come with a 3hp, 4hp, and 5hp motor.  I have the 5hp.  I know that when
> it
> comes to getting a new compressor, bigger is better, to the extent of your
> budget.
>
> 1. What is the advantage of the different hp motors.  I know the big
> advantage
> for the 5hp is it runs on 220V.  But how does the hp affect the
> compressor.
> same
> My current compressor is an oil lubricated one.
>
> 2. I see oil-less compressors that supposedly have fantastic specs for air
> supply
> 3.  Any body have an oil-less compressor?  How do you like it?  I was
> reading an
> ways.
> high air
> demand over a long time like in a commercial shop.  But my dad's
> compressor,
> a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil lubed.  We
> got dad's
> 2015.  I
> ------------------------------
>  <https://www.avast.com/antivirus>
>
> This email has been checked for viruses by Avast antivirus software.
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>
> <#m_-911417382658544781_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
> From Dennis Prager - The American Trilogy:
>      Liberty - the  power  of  choosing,  thinking,  and  acting  for
>                   oneself; freedom  from  control  or  restriction
>
>
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
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<div dir=3D"ltr">Hi John,<div><br></div><div>The oil-less compressors proba=
bly are good enough for casual use, but the ones that I have been around we=
re noisy, probably because they tend to have aluminum blocks and that they =
tend to spin at higher RPM than the larger, heavier cast iron oil-type=C2=
=A0compressors.</div><div><br></div><div>The noise they make also seems mor=
e annoying to my ear, anyway. A larger, slower spinning pump emits noise, o=
f course, but it does not seem as harsh as the noise from the oil-less comp=
ressor that I have heard.</div><div><br></div><div>One advantage of the oil=
-less compressors is that they will not inject oil into the air supply if y=
ou are spraying paint.</div><div><br></div><div>FYIW</div><div><br></div><d=
iv>best,</div><div><br></div><div>doug</div></div><br><div class=3D"gmail_q=
uote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 10, 2021 at 11:25 A=
M John T. Blair &lt;<a href=3D"mailto:[email-masked]">[email-masked]=
t</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
<div>
<font size=3D"3"><br>
Thanks again for all the replies to my original post about my compressor
motor<br>
not working.<br><br>
With all this going on, I have been doing some thinking about having to
buy a new=C2=A0 <br>
compressor if I can&#39;t get this motor running.=C2=A0 That said, this
compressor appears <br>
to come with a 3hp, 4hp, and 5hp motor.=C2=A0 I have the 5hp.=C2=A0 I
know that when it<br>
comes to getting a new compressor, bigger is better, to the extent of
your budget.=C2=A0 <br><br>
1. What is the advantage of the different hp motors.=C2=A0 I know the big
advantage<br>
for the 5hp is it runs on 220V.=C2=A0 But how does the hp affect the
compressor.=C2=A0 <br>
Based on the info in the manual, it appears that all 3 versions have the
same <br>
SCFM specs.<br><br>
My current compressor is an oil lubricated one.=C2=A0 <br><br>
2. I see oil-less compressors that supposedly have fantastic specs for
air supply<br>
that are so much cheaper than oil lubed versions.=C2=A0 Any
thoughts?<br><br>
3.=C2=A0 Any body have an oil-less compressor?=C2=A0 How do you like
it?=C2=A0 I was reading an<br>
article that was talking about how the oil-less versions have come a long
ways.=C2=A0 <br>
They were saying that the biggest advantage for the oil liubes was for
high air<br>
demand over a long time like in a commercial shop.=C2=A0 But my dad&#39;s
compressor,<br>
a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil
lubed.=C2=A0 We got dad&#39;s<br>
compressor back in the 60s and it was still running when he passed in
2015.=C2=A0 I <br>
bought mine back about &#39;90.=C2=A0 So I lean toward them.=C2=A0 But is
that realistic?<br><br>
John<br><br>
<br>
</font><div id=3D"gmail-m_-911417382658544781DAB4FAD8-2DD7-40BB-A1B8-4E2AA1=
F9FDF2">
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<br>
<div>John T. Blair=C2=A0 WA4OHZ=C2=A0=C2=A0=C2=A0=C2=A0 email:=C2=A0
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a></div>
<div>Va. Beach,
Va=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
Phone:=C2=A0 (757) 495-8229</div>
<br>
<div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 48
TR1800=C2=A0=C2=A0=C2=A0 48 #4 Midget=C2=A0=C2=A0=C2=A0 65 Morgan 4/4
Series V (B1106)</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 75 Bricklin SV1 (#0887)=C2=A0=C2=A0=C2=A0
77 Spitfire=C2=A0=C2=A0=C2=A0 71 Saab Sonett III</div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
65 Rambler Classic</div>
<br>
<div>Morgan:=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.team.net/morgan" target=3D"_blank">
www.team.net/morgan</a></div>
<div>Bricklin:=C2=A0=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.bricklin.org/" target=3D"_blank">www.bricklin.org</a>
</div>
<br>
<div>If you can read
this=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0
- Thank a teacher!</div>
<div>If you are reading it in English - Thank a Vet!!</div>
<br>
<div> From Dennis Prager - The American Trilogy:</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 e pluribus Unum, &quot;from many,
one.&quot;</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 In God We Trust</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 Liberty - the=C2=A0 power=C2=A0 of=C2=A0
choosing,=C2=A0 thinking,=C2=A0 and=C2=A0 acting=C2=A0 for=C2=A0 </div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0
oneself; freedom=C2=A0 from=C2=A0 control=C2=A0 or=C2=A0
restriction=C2=A0 </div>
<br>
<br>

_______________________________________________<br>
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[email-masked]

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From: Mark Andy <[email-masked]>
Date: Tue, 10 Aug 2021 14:59:42 -0400

--===============3597148406550712118==

--00000000000024066a05c9391bb3

Howdy,

If I were buying a compressor today and the air requirements were modest, I
would be looking HARD at one of the super quiet compressor types that are
available now.

HF link just because it's easy, but there are also name brand versions of
this type of thing IIRC...

https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html

Mark

On Tue, Aug 10, 2021 at 2:42 PM old dirtbeard <[email-masked]> wrote:

>> to come with a 3hp, 4hp, and 5hp motor.  I have the 5hp.  I know that
>> when it
>> your budget.
>> air supply
>> <#m_283659243399797963_m_-911417382658544781_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>>
> http://autox.team.net/mailman/options/shop-talk/[email-masked]
>
>

--00000000000024066a05c9391bb3
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Howdy,<div><br></div><div>If I were buying=C2=A0a compress=
or today and the air requirements were modest, I would be looking HARD at o=
ne of the super quiet=C2=A0compressor types that are available now.<br><br>=
HF link just because it&#39;s easy, but there are also name brand versions =
of this type of thing IIRC...<br><br><a href=3D"https://www.harborfreight.c=
om/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.htm=
l">https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-sho=
pauto-air-compressor-57336.html</a><br><br>Mark</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 10, 2021=
 at 2:42 PM old dirtbeard &lt;<a href=3D"mailto:[email-masked]">dirtbe=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div dir=3D"ltr">Hi John,<div><br></div><div>The oil-less comp=
ressors probably are good enough for casual use, but the ones that I have b=
een around were noisy, probably because they tend to have aluminum blocks a=
nd that they tend to spin at higher RPM than the larger, heavier cast iron =
oil-type=C2=A0compressors.</div><div><br></div><div>The noise they make als=
o seems more annoying to my ear, anyway. A larger, slower spinning pump emi=
ts noise, of course, but it does not seem as harsh as the noise from the oi=
l-less compressor that I have heard.</div><div><br></div><div>One advantage=
 of the oil-less compressors is that they will not inject oil into the air =
supply if you are spraying paint.</div><div><br></div><div>FYIW</div><div><=
br></div><div>best,</div><div><br></div><div>doug</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 10, 2021=
 at 11:25 AM John T. Blair &lt;<a href=3D"mailto:[email-masked]" target=
=3D"_blank">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(2=
04,204,204);padding-left:1ex">
<div>
<font size=3D"3"><br>
Thanks again for all the replies to my original post about my compressor
motor<br>
not working.<br><br>
With all this going on, I have been doing some thinking about having to
buy a new=C2=A0 <br>
compressor if I can&#39;t get this motor running.=C2=A0 That said, this
compressor appears <br>
to come with a 3hp, 4hp, and 5hp motor.=C2=A0 I have the 5hp.=C2=A0 I
know that when it<br>
comes to getting a new compressor, bigger is better, to the extent of
your budget.=C2=A0 <br><br>
1. What is the advantage of the different hp motors.=C2=A0 I know the big
advantage<br>
for the 5hp is it runs on 220V.=C2=A0 But how does the hp affect the
compressor.=C2=A0 <br>
Based on the info in the manual, it appears that all 3 versions have the
same <br>
SCFM specs.<br><br>
My current compressor is an oil lubricated one.=C2=A0 <br><br>
2. I see oil-less compressors that supposedly have fantastic specs for
air supply<br>
that are so much cheaper than oil lubed versions.=C2=A0 Any
thoughts?<br><br>
3.=C2=A0 Any body have an oil-less compressor?=C2=A0 How do you like
it?=C2=A0 I was reading an<br>
article that was talking about how the oil-less versions have come a long
ways.=C2=A0 <br>
They were saying that the biggest advantage for the oil liubes was for
high air<br>
demand over a long time like in a commercial shop.=C2=A0 But my dad&#39;s
compressor,<br>
a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil
lubed.=C2=A0 We got dad&#39;s<br>
compressor back in the 60s and it was still running when he passed in
2015.=C2=A0 I <br>
bought mine back about &#39;90.=C2=A0 So I lean toward them.=C2=A0 But is
that realistic?<br><br>
John<br><br>
<br>
</font><div id=3D"gmail-m_283659243399797963gmail-m_-911417382658544781DAB4=
FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
<br><br>
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				This email has been checked for viruses by Avast antivirus software.
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<br>
<a href=3D"#m_283659243399797963_m_-911417382658544781_DAB4FAD8-2DD7-40BB-A=
1B8-4E2AA1F9FDF2" width=3D"1" height=3D"1"> </a></div></div>
<br>
<div>John T. Blair=C2=A0 WA4OHZ=C2=A0=C2=A0=C2=A0=C2=A0 email:=C2=A0
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a></div>
<div>Va. Beach,
Va=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
Phone:=C2=A0 (757) 495-8229</div>
<br>
<div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 48
TR1800=C2=A0=C2=A0=C2=A0 48 #4 Midget=C2=A0=C2=A0=C2=A0 65 Morgan 4/4
Series V (B1106)</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 75 Bricklin SV1 (#0887)=C2=A0=C2=A0=C2=A0
77 Spitfire=C2=A0=C2=A0=C2=A0 71 Saab Sonett III</div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
65 Rambler Classic</div>
<br>
<div>Morgan:=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.team.net/morgan" target=3D"_blank">
www.team.net/morgan</a></div>
<div>Bricklin:=C2=A0=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.bricklin.org/" target=3D"_blank">www.bricklin.org</a>
</div>
<br>
<div>If you can read
this=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0
- Thank a teacher!</div>
<div>If you are reading it in English - Thank a Vet!!</div>
<br>
<div> From Dennis Prager - The American Trilogy:</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 e pluribus Unum, &quot;from many,
one.&quot;</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 In God We Trust</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 Liberty - the=C2=A0 power=C2=A0 of=C2=A0
choosing,=C2=A0 thinking,=C2=A0 and=C2=A0 acting=C2=A0 for=C2=A0 </div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0
oneself; freedom=C2=A0 from=C2=A0 control=C2=A0 or=C2=A0
restriction=C2=A0 </div>
<br>
<br>

alk/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.t=
eam.net/mailman/options/shop-talk/[email-masked]</a><br>
<br>
</blockquote></div>

--00000000000024066a05c9391bb3--

--===============3597148406550712118==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

[email-masked]

--===============3597148406550712118==--

---

From: Jeff Scarbrough <[email-masked]>
Date: Tue, 10 Aug 2021 16:40:05 -0400

--===============5870102064915100658==

--0000000000006ac87a05c93a82e9

We just bought a Kobalt version of that to sun some scanning equipment in
our new air filtration system.  Have only turned it on once so far, but
it's definitely not as loud as I thought it would be.

On Tue, Aug 10, 2021, 15:05 Mark Andy <[email-masked]> wrote:

> Howdy,
>
> If I were buying a compressor today and the air requirements were modest,
> I would be looking HARD at one of the super quiet compressor types that are
> available now.
>
>> One advantage of the oil-less compressors is that they will not inject
>> oil into the air supply if you are spraying paint.
>>
>> FYIW
>>
>> best,
>>
>> doug
>>
>>> compressor if I can't get this motor running.  That said, this
>>> compressor appears
>>> article that was talking about how the oil-less versions have come a
>>> long ways.
>>> a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil lubed.
>>> We got dad's
>>> <#m_-3996500071811484852_m_283659243399797963_m_-911417382658544781_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>>>
> http://autox.team.net/mailman/options/shop-talk/[email-masked]
>
>

--0000000000006ac87a05c93a82e9
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">We just bought a Kobalt version of that to sun some scann=
ing equipment in our new air filtration system.=C2=A0 Have only turned it o=
n once so far, but it&#39;s definitely not as loud as I thought it would be=
.</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr"=
>On Tue, Aug 10, 2021, 15:05 Mark Andy &lt;<a href=3D"mailto:marka@maracing=
.com">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex"><div dir=3D"ltr">Howdy,<div><br></div><div>If I were buying=C2=A0a com=
pressor today and the air requirements were modest, I would be looking HARD=
 at one of the super quiet=C2=A0compressor types that are available now.<br=
><br>HF link just because it&#39;s easy, but there are also name brand vers=
ions of this type of thing IIRC...<br><br><a href=3D"https://www.harborfrei=
ght.com/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-5733=
6.html" target=3D"_blank" rel=3D"noreferrer">https://www.harborfreight.com/=
26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html</=
a><br><br>Mark</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" c=
lass=3D"gmail_attr">On Tue, Aug 10, 2021 at 2:42 PM old dirtbeard &lt;<a hr=
ef=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferrer">dirt=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex"><div dir=3D"ltr">Hi John,<div><br></div><div>The oil-less co=
mpressors probably are good enough for casual use, but the ones that I have=
 been around were noisy, probably because they tend to have aluminum blocks=
 and that they tend to spin at higher RPM than the larger, heavier cast iro=
n oil-type=C2=A0compressors.</div><div><br></div><div>The noise they make a=
lso seems more annoying to my ear, anyway. A larger, slower spinning pump e=
mits noise, of course, but it does not seem as harsh as the noise from the =
oil-less compressor that I have heard.</div><div><br></div><div>One advanta=
ge of the oil-less compressors is that they will not inject oil into the ai=
r supply if you are spraying paint.</div><div><br></div><div>FYIW</div><div=
><br></div><div>best,</div><div><br></div><div>doug</div></div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 10, 20=
21 at 11:25 AM John T. Blair &lt;<a href=3D"mailto:[email-masked]" targ=
et=3D"_blank" rel=3D"noreferrer">[email-masked]</a>&gt; wrote:<br></div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<font size=3D"3"><br>
Thanks again for all the replies to my original post about my compressor
motor<br>
not working.<br><br>
With all this going on, I have been doing some thinking about having to
buy a new=C2=A0 <br>
compressor if I can&#39;t get this motor running.=C2=A0 That said, this
compressor appears <br>
to come with a 3hp, 4hp, and 5hp motor.=C2=A0 I have the 5hp.=C2=A0 I
know that when it<br>
comes to getting a new compressor, bigger is better, to the extent of
your budget.=C2=A0 <br><br>
1. What is the advantage of the different hp motors.=C2=A0 I know the big
advantage<br>
for the 5hp is it runs on 220V.=C2=A0 But how does the hp affect the
compressor.=C2=A0 <br>
Based on the info in the manual, it appears that all 3 versions have the
same <br>
SCFM specs.<br><br>
My current compressor is an oil lubricated one.=C2=A0 <br><br>
2. I see oil-less compressors that supposedly have fantastic specs for
air supply<br>
that are so much cheaper than oil lubed versions.=C2=A0 Any
thoughts?<br><br>
3.=C2=A0 Any body have an oil-less compressor?=C2=A0 How do you like
it?=C2=A0 I was reading an<br>
article that was talking about how the oil-less versions have come a long
ways.=C2=A0 <br>
They were saying that the biggest advantage for the oil liubes was for
high air<br>
demand over a long time like in a commercial shop.=C2=A0 But my dad&#39;s
compressor,<br>
a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil
lubed.=C2=A0 We got dad&#39;s<br>
compressor back in the 60s and it was still running when he passed in
2015.=C2=A0 I <br>
bought mine back about &#39;90.=C2=A0 So I lean toward them.=C2=A0 But is
that realistic?<br><br>
John<br><br>
<br>
</font><div id=3D"m_-3996500071811484852gmail-m_283659243399797963gmail-m_-=
911417382658544781DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
<br><br>
<hr style=3D"border:none;color:rgb(144,144,144);background-color:rgb(176,17=
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<br>
<div>John T. Blair=C2=A0 WA4OHZ=C2=A0=C2=A0=C2=A0=C2=A0 email:=C2=A0
<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferrer">=
[email-masked]</a></div>
<div>Va. Beach,
Va=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
Phone:=C2=A0 (757) 495-8229</div>
<br>
<div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 48
TR1800=C2=A0=C2=A0=C2=A0 48 #4 Midget=C2=A0=C2=A0=C2=A0 65 Morgan 4/4
Series V (B1106)</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 75 Bricklin SV1 (#0887)=C2=A0=C2=A0=C2=A0
77 Spitfire=C2=A0=C2=A0=C2=A0 71 Saab Sonett III</div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
65 Rambler Classic</div>
<br>
<div>Morgan:=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.team.net/morgan" target=3D"_blank" rel=3D"noreferrer"=
<a href=3D"http://www.bricklin.org/" target=3D"_blank" rel=3D"noreferrer">w=
ww.bricklin.org</a>

_______________________________________________<br>
<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"norefe=
rrer">[email-masked]</a><br>
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alk/[email-masked]" rel=3D"noreferrer noreferrer" target=3D"_blank">ht=
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<br>
alk/[email-masked]" rel=3D"noreferrer noreferrer" target=3D"_blank">htt=
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--0000000000006ac87a05c93a82e9--

--===============5870102064915100658==
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[email-masked]

--===============5870102064915100658==--

---

From: Robert Rochlin <[email-masked]>
Date: Tue, 10 Aug 2021 17:32:15 -0400

--===============3548936308572899831==
Content-Transfer-Encoding: 7bit

--Apple-Mail-0B4C3062-82F2-4C72-ACB2-8B58178B33C6
	charset=utf-8
Content-Transfer-Encoding: quoted-printable

I=E2=80=99ve had the same Craftsman oil-less unit for about 25 years.  The o=
nly repair has been the regulator a couple years ago.  My biggest like is th=
at the air is clean when I use it for painting, biggest drawback is the incr=
edibly high noise level.  I=E2=80=99ve got a shut off valve right at the air=
 output that does a great job of holding the line pressure.  I keep the comp=
ressor on all the time and when I go to use it it has full pressure so avoid=
 start up pressurization racket. =20
Best,=20
Bob
Sent from my iPhone

> On Aug 10, 2021, at 3:05 PM, Mark Andy <[email-masked]> wrote:
>=20
> =EF=BB=BF
> Howdy,
>=20
> If I were buying a compressor today and the air requirements were modest, I=
 would be looking HARD at one of the super quiet compressor types that are a=
vailable now.
>=20
> HF link just because it's easy, but there are also name brand versions of t=
his type of thing IIRC...
>=20
> https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopa=
uto-air-compressor-57336.html
>=20
> Mark
>=20
>> On Tue, Aug 10, 2021 at 2:42 PM old dirtbeard <[email-masked]> wrote=
:
>> Hi John,
>>=20
>> The oil-less compressors probably are good enough for casual use, but the=
 ones that I have been around were noisy, probably because they tend to have=
 aluminum blocks and that they tend to spin at higher RPM than the larger, h=
eavier cast iron oil-type compressors.
>>=20
>> The noise they make also seems more annoying to my ear, anyway. A larger,=
 slower spinning pump emits noise, of course, but it does not seem as harsh a=
s the noise from the oil-less compressor that I have heard.
>>=20
>> One advantage of the oil-less compressors is that they will not inject oi=
l into the air supply if you are spraying paint.
>>=20
>> FYIW
>>=20
>> best,
>>=20
>> doug
>>=20
>>> On Tue, Aug 10, 2021 at 11:25 AM John T. Blair <[email-masked]> wrot=
e:
>>>=20
>>> Thanks again for all the replies to my original post about my compressor=
 motor
>>> not working.
>>>=20
>>> With all this going on, I have been doing some thinking about having to b=
uy a new =20
>>> compressor if I can't get this motor running.  That said, this compresso=
r appears=20
>>> to come with a 3hp, 4hp, and 5hp motor.  I have the 5hp.  I know that wh=
en it
>>> comes to getting a new compressor, bigger is better, to the extent of yo=
ur budget. =20
>>>=20
>>> 1. What is the advantage of the different hp motors.  I know the big adv=
antage
>>> for the 5hp is it runs on 220V.  But how does the hp affect the compress=
or. =20
>>> Based on the info in the manual, it appears that all 3 versions have the=
 same=20
>>> 2. I see oil-less compressors that supposedly have fantastic specs for a=
ir supply
>>> 3.  Any body have an oil-less compressor?  How do you like it?  I was re=
ading an
>>> article that was talking about how the oil-less versions have come a lon=
g ways. =20
>>> They were saying that the biggest advantage for the oil liubes was for h=
igh air
>>> demand over a long time like in a commercial shop.  But my dad's compres=
sor,
>>> a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil lubed.  W=
e got dad's
>>> compressor back in the 60s and it was still running when he passed in 20=
15.  I=20
>>> bought mine back about '90.  So I lean toward them.  But is that realist=
ic?
>>>      Liberty - the  power  of  choosing,  thinking,  and  acting  for=20=

>>> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/a=
rchive
>>>=20
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/dirt=
[email-masked]
>> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/ar=
chive
>>=20
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/marka=
@maracing.com
> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/arc=
hive
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/rrochl=
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Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">I=E2=80=99ve had the same Craftsman oil-les=
s unit for about 25 years. &nbsp;The only repair has been the regulator a co=
uple years ago. &nbsp;My biggest like is that the air is clean when I use it=
 for painting, biggest drawback is the incredibly high noise level. &nbsp;I=E2=
=80=99ve got a shut off valve right at the air output that does a great job o=
f holding the line pressure. &nbsp;I keep the compressor on all the time and=
 when I go to use it it has full pressure so avoid start up pressurization r=
acket. &nbsp;<br>Best,&nbsp;<div>Bob<br><div dir=3D"ltr">Sent from my iPhone=
</div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Aug 10, 2021, at 3:0=
5 PM, Mark Andy &lt;[email-masked]&gt; wrote:<br><br></blockquote></div>=
<blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr">Howdy,<=
div><br></div><div>If I were buying&nbsp;a compressor today and the air requ=
irements were modest, I would be looking HARD at one of the super quiet&nbsp=
;compressor types that are available now.<br><br>HF link just because it's e=
asy, but there are also name brand versions of this type of thing IIRC...<br=
><br><a href=3D"https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-=
vertical-shopauto-air-compressor-57336.html">https://www.harborfreight.com/2=
6-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html</a>=
<br><br>Mark</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" clas=
s=3D"gmail_attr">On Tue, Aug 10, 2021 at 2:42 PM old dirtbeard &lt;<a href=3D=
"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Hi John,<div>=
<br></div><div>The oil-less compressors probably are good enough for casual u=
se, but the ones that I have been around were noisy, probably because they t=
end to have aluminum blocks and that they tend to spin at higher RPM than th=
e larger, heavier cast iron oil-type&nbsp;compressors.</div><div><br></div><=
div>The noise they make also seems more annoying to my ear, anyway. A larger=
, slower spinning pump emits noise, of course, but it does not seem as harsh=
 as the noise from the oil-less compressor that I have heard.</div><div><br>=
</div><div>One advantage of the oil-less compressors is that they will not i=
nject oil into the air supply if you are spraying paint.</div><div><br></div=
><div>FYIW</div><div><br></div><div>best,</div><div><br></div><div>doug</div=
></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Tue, Aug 10, 2021 at 11:25 AM John T. Blair &lt;<a href=3D"mailto:jblair1=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt; wrote:<br></div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<font size=3D"3"><br>
Thanks again for all the replies to my original post about my compressor
motor<br>
not working.<br><br>
With all this going on, I have been doing some thinking about having to
buy a new&nbsp; <br>
compressor if I can't get this motor running.&nbsp; That said, this
compressor appears <br>
to come with a 3hp, 4hp, and 5hp motor.&nbsp; I have the 5hp.&nbsp; I
know that when it<br>
comes to getting a new compressor, bigger is better, to the extent of
your budget.&nbsp; <br><br>
1. What is the advantage of the different hp motors.&nbsp; I know the big
advantage<br>
for the 5hp is it runs on 220V.&nbsp; But how does the hp affect the
compressor.&nbsp; <br>
Based on the info in the manual, it appears that all 3 versions have the
same <br>
SCFM specs.<br><br>
My current compressor is an oil lubricated one.&nbsp; <br><br>
2. I see oil-less compressors that supposedly have fantastic specs for
air supply<br>
that are so much cheaper than oil lubed versions.&nbsp; Any
thoughts?<br><br>
3.&nbsp; Any body have an oil-less compressor?&nbsp; How do you like
it?&nbsp; I was reading an<br>
article that was talking about how the oil-less versions have come a long
ways.&nbsp; <br>
They were saying that the biggest advantage for the oil liubes was for
high air<br>
demand over a long time like in a commercial shop.&nbsp; But my dad's
compressor,<br>
a 4hp 220V 20 gal unit and my 5hp 220V 30 gal rig were all oil
lubed.&nbsp; We got dad's<br>
compressor back in the 60s and it was still running when he passed in
2015.&nbsp; I <br>
bought mine back about '90.&nbsp; So I lean toward them.&nbsp; But is
that realistic?<br><br>
John<br><br>
<br>
</font><div id=3D"gmail-m_283659243399797963gmail-m_-911417382658544781DAB4FA=
D8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
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<div>John T. Blair&nbsp; WA4OHZ&nbsp;&nbsp;&nbsp;&nbsp; email:&nbsp;
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]</=
a></div>
<div>Va. Beach,
Va&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;
Phone:&nbsp; (757) 495-8229</div>
<br>
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www.team.net/morgan</a></div>
<div>Bricklin:&nbsp;&nbsp;&nbsp;&nbsp;
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</div>
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[email-masked]

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From: "John T. Blair" <[email-masked]> mail.com>
Date: Tue, 10 Aug 2021 22:52:20 -0400

--===============8874863418334149958==
	boundary="=====================_504148==.ALT"

--=====================_504148==.ALT

 >would be looking HARD at one of the super quiet compressor types that are

Again thanks to everyone.  Mark mentions the harbor freight compressor:

<https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html>https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html

Looking at it's basic specs, it is only rated at  4.5 SCFM @ 
90PSI.  My compressor
is rated at  9.3 SCFM @ 90 PSI.  I've have used my compressor for everything
from painting cars, sanding, impact hammers, die grinders, and both 
media blasting
cabinets & pressure blasting.  And I'm always running out of air and 
stopping to let
the compressor catch up.

So that brings up more questions:

1. What really controls how much a comperssor can generate, ie. SCFM?

2. What controls how long your compressor can supply air before 
having to start
the motor to refill the tank?  I realize that some air tools use a 
LOT more air, but
I'm speaking for any given tool, not compairing something like spray 
painting to
undoing 5 lugnuts on a car.

3. Why is a bigger tank better?  After the compressor's pressure 
switch kicks on,
doesn't it take longer for the compressor to reach the shut off 
pressure with a
larger tank?

4. How can a 1.7 hp compressor deliver a peek of 175 psi and a 
regulated 155 psi
when my 5 hp can only charge to 125 psi.  I realize part of that is due to the
pressure switch, mine is 110 on - 125 off, but really.  Can I put a 
pressure switch in mine and 175 psi.   I don't really think so.  Is 
this more advertising hype like
when they were rating compressors at their starting current vs 
running current for
hp?  They could get 7hp of of a 110V motor - NOT!

John

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<font size=3>At 02:59 PM 8/10/2021, Mark Andy wrote:<br><br>
&gt;If I were buying a compressor today and the air requirements were
modest, I<br>
&gt;would be looking HARD at one of the super quiet compressor types that
are <br>
&gt;available now.<br><br>
Again thanks to everyone.&nbsp; Mark mentions the harbor freight
compressor:<br><br>
<a href="https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html">
https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopauto-air-compressor-57336.html</a>
<br><br>
Looking at it's basic specs, it is only rated at&nbsp; 4.5 SCFM @
90PSI.&nbsp; My compressor<br>
is rated at&nbsp; 9.3 SCFM @ 90 PSI.&nbsp; I've have used my compressor
for everything <br>
from painting cars, sanding, impact hammers, die grinders, and both media
blasting <br>
cabinets &amp; pressure blasting.&nbsp; And I'm always running out of air
and stopping to let<br>
the compressor catch up.<br><br>
So that brings up more questions:<br><br>
1. What really controls how much a comperssor can generate, ie.
SCFM?<br><br>
2. What controls how long your compressor can supply air before having to
start <br>
the motor to refill the tank?&nbsp; I realize that some air tools use a
LOT more air, but<br>
I'm speaking for any given tool, not compairing something like spray
painting to <br>
undoing 5 lugnuts on a car.&nbsp; <br><br>
3. Why is a bigger tank better?&nbsp; After the compressor's pressure
switch kicks on, <br>
doesn't it take longer for the compressor to reach the shut off pressure
with a <br>
larger tank?<br><br>
4. How can a 1.7 hp compressor deliver a peek of 175 psi and a regulated
155 psi <br>
when my 5 hp can only charge to 125 psi.&nbsp; I realize part of that is
due to the <br>
pressure switch, mine is 110 on - 125 off, but really.&nbsp; Can I put a
pressure switch in mine and 175 psi.&nbsp;&nbsp; I don't really think
so.&nbsp; Is this more advertising hype like <br>
when they were rating compressors at their starting current vs running
current for <br>
hp?&nbsp; They could get 7hp of of a 110V motor - NOT!<br><br>
John<br><br>
</font><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
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<br>
<div>John T. Blair&nbsp; WA4OHZ&nbsp;&nbsp;&nbsp;&nbsp; email:&nbsp;
[email-masked]</div>
<div>Va. Beach,
Va&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Phone:&nbsp; (757) 495-8229</div>
<br>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 48
TR1800&nbsp;&nbsp;&nbsp; 48 #4 Midget&nbsp;&nbsp;&nbsp; 65 Morgan 4/4
Series V (B1106)</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; 75 Bricklin SV1 (#0887)&nbsp;&nbsp;&nbsp;
77 Spitfire&nbsp;&nbsp;&nbsp; 71 Saab Sonett III</div>
<div>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
65 Rambler Classic</div>
<br>
<div>Morgan:&nbsp;&nbsp;&nbsp;
<a href="http://www.team.net/morgan" EUDORA=AUTOURL>
www.team.net/morgan</a></div>
<div>Bricklin:&nbsp;&nbsp;&nbsp;&nbsp;
<a href="http://www.bricklin.org/" EUDORA=AUTOURL>www.bricklin.org</a>
</div>
<br>
<div>If you can read
this&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
- Thank a teacher!</div>
<div>If you are reading it in English - Thank a Vet!!</div>
<br>
<div> From Dennis Prager - The American Trilogy:</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; e pluribus Unum, &quot;from many,
one.&quot;</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; In God We Trust</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp; Liberty - the&nbsp; power&nbsp; of&nbsp;
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[email-masked]

--===============8874863418334149958==--

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From: old dirtbeard <[email-masked]>
Date: Wed, 11 Aug 2021 06:24:22 -0700

--===============8666431353813871573==

--000000000000148d5c05c9488a98

Mostly the amperage of the motor and the design of the pump. You can ignore
the HP ratings for the most part and just look at the current draw assuming
you are looking at the same voltage (e.g., 220VAC). Some pumps are more
efficient, but mostly the power of the motor will determine what size pump
and how fast you can spin it, which will determine the CFM.

2. What controls how long your compressor can supply air before having to
start
the motor to refill the tank?  I realize that some air tools use a LOT more
air, but
I'm speaking for any given tool, not compairing something like spray
painting to
undoing 5 lugnuts on a car.
Here it is just the storage capacity of the tank minus the continuous draw
of the tool. Larger tanks will require less frequent pump cycling with the
same amount of draw than would a smaller tank.

3. Why is a bigger tank better?  After the compressor's pressure switch
kicks on,
doesn't it take longer for the compressor to reach the shut off pressure
with a
larger tank?
See above, but the larger the tank, generally the longer the motor off
cycles against a similar load. Think of it like a battery in a cordless
drill. the larger the battery, the longer it will run before it needs to be
recharged. The same metaphor works for the pump and the tank.

4. How can a 1.7 hp compressor deliver a peek of 175 psi and a regulated
155 psi
when my 5 hp can only charge to 125 psi.  I realize part of that is due to
the
pressure switch, mine is 110 on - 125 off, but really.  Can I put a
pressure switch in mine and 175 psi.   I don't really think so.  Is this
more advertising hype like
when they were rating compressors at their starting current vs running
current for
hp?  They could get 7hp of of a 110V motor - NOT!

Most compressors with a 175 psi rating are dual stage, a primary and a
secondary piston or sets of piston. The first piston compresses the air to
125 psi and the second one to 175 psi. Most single stage pumps are limited
to 125 -135 psi. One advantage of a two-stage pump is that by compressing
the air to 175 psi, you increase the amount of compressed air stored in a
given size tank.  One achieves about 40% more stored compressed air in a
tank if the pump is capable of 175 psi vs. 125 psi. The single stage pumps
generally are lower cost than the dual stage pumps.

You should not try to increase your psi rating by changing the limit
switch, The psi rating is determined by the design of the pump.
Again, the best rating for the power of the motor is the continuous
amperage rating. The start-up amperage will be significantly higher. Ignore
the HP rating for the most part.

best ,
Doug

On Tue, Aug 10, 2021 at 7:58 PM John T. Blair <[email-masked]> wrote:

> I
> Looking at it's basic specs, it is only rated at  4.5 SCFM @ 90PSI.  My
> compressor
> blasting
> start
> the motor to refill the tank?  I realize that some air tools use a LOT
> more air, but
> 3. Why is a bigger tank better?  After the compressor's pressure switch
> kicks on,
> with a
> 155 psi
> pressure switch in mine and 175 psi.   I don't really think so.  Is this
> more advertising hype like
> current for
> <#m_8777314284171356316_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>

--000000000000148d5c05c9488a98
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><br style=3D"font-size:medium"><span style=3D"font-size:me=
dium">1. What really controls how much a comperssor can generate, ie. SCFM?=
</span><div><br></div><div>Mostly the amperage of the motor and the design =
of the pump. You can ignore the HP ratings for the most part and just look =
at the current draw assuming you are looking at the same voltage (e.g., 220=
VAC). Some pumps are more efficient, but mostly the power of the motor will=
 determine what size pump and how fast you can spin it, which will determin=
e the CFM.<br style=3D"font-size:medium"><br style=3D"font-size:medium"><sp=
an style=3D"font-size:medium">2. What controls how long your compressor can=
 supply air before having to start</span><br style=3D"font-size:medium"><sp=
an style=3D"font-size:medium">the motor to refill the tank?=C2=A0 I realize=
 that some air tools use a LOT more air, but</span><br style=3D"font-size:m=
edium"><span style=3D"font-size:medium">I&#39;m speaking for any given tool=
, not compairing something like spray painting to</span><br style=3D"font-s=
ize:medium"><span style=3D"font-size:medium">undoing 5 lugnuts on a car.=C2=
=A0</span></div><div>Here it is just the storage capacity of the tank minus=
 the continuous draw of the tool. Larger tanks will require less frequent p=
ump cycling with the same amount of draw than would a smaller tank.<br styl=
e=3D"font-size:medium"><br style=3D"font-size:medium"><span style=3D"font-s=
ize:medium">3. Why is a bigger tank better?=C2=A0 After the compressor&#39;=
s pressure switch kicks on,</span><br style=3D"font-size:medium"><span styl=
e=3D"font-size:medium">doesn&#39;t it take longer for the compressor to rea=
ch the shut off pressure with a</span><br style=3D"font-size:medium"><span =
style=3D"font-size:medium">larger tank?</span></div><div>See above, but the=
 larger the tank, generally the longer the motor off cycles against a simil=
ar load. Think of it like a battery in a cordless drill. the larger the bat=
tery, the longer it will run before it needs to be recharged. The same meta=
phor works for the pump and the tank.=C2=A0<br style=3D"font-size:medium"><=
br style=3D"font-size:medium"><span style=3D"font-size:medium">4. How can a=
 1.7 hp compressor deliver a peek of 175 psi and a regulated 155 psi</span>=
<br style=3D"font-size:medium"><span style=3D"font-size:medium">when my 5 h=
p can only charge to 125 psi.=C2=A0 I realize part of that is due to the</s=
pan><br style=3D"font-size:medium"><span style=3D"font-size:medium">pressur=
e switch, mine is 110 on - 125 off, but really.=C2=A0 Can I put a pressure =
switch in mine and 175 psi.=C2=A0=C2=A0 I don&#39;t really think so.=C2=A0 =
Is this more advertising hype like</span><br style=3D"font-size:medium"><sp=
an style=3D"font-size:medium">when they were rating compressors at their st=
arting current vs running current for</span><br style=3D"font-size:medium">=
<span style=3D"font-size:medium">hp?=C2=A0 They could get 7hp of of a 110V =
motor - NOT!=C2=A0</span></div><div><span style=3D"font-size:medium"><br></=
span></div><div>Most compressors with a 175 psi rating are dual stage, a pr=
imary and a secondary piston or sets of piston. The first piston compresses=
 the air to 125 psi and the second one to 175 psi. Most single stage pumps =
are limited to 125 -135 psi. One advantage of a two-stage pump is that by c=
ompressing the air to 175 psi, you increase the amount of compressed air st=
ored in a given size tank.=C2=A0 One achieves about 40% more stored compres=
sed air in a tank if the pump is capable of 175 psi vs. 125 psi. The single=
 stage pumps generally are lower cost than the dual stage pumps.</div><div>=
<br></div><div>You should not try to increase your psi rating by changing t=
he limit switch, The psi rating is determined by the design of the pump.=C2=
=A0</div><div>Again, the best rating for the power of the motor is the cont=
inuous amperage rating. The start-up amperage will be significantly higher.=
 Ignore the HP rating for the most part.</div><div><br></div><div>best ,</d=
iv><div>Doug</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cla=
ss=3D"gmail_attr">On Tue, Aug 10, 2021 at 7:58 PM John T. Blair &lt;<a href=
=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<font size=3D"3">At 02:59 PM 8/10/2021, Mark Andy wrote:<br><br>
&gt;If I were buying a compressor today and the air requirements were
modest, I<br>
&gt;would be looking HARD at one of the super quiet compressor types that
are <br>
&gt;available now.<br><br>
Again thanks to everyone.=C2=A0 Mark mentions the harbor freight
compressor:<br><br>
<a href=3D"https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vert=
ical-shopauto-air-compressor-57336.html" target=3D"_blank">
https://www.harborfreight.com/26-gallon-175-psi-ultra-quiet-vertical-shopau=
to-air-compressor-57336.html</a>
<br><br>
Looking at it&#39;s basic specs, it is only rated at=C2=A0 4.5 SCFM @
90PSI.=C2=A0 My compressor<br>
is rated at=C2=A0 9.3 SCFM @ 90 PSI.=C2=A0 I&#39;ve have used my compressor
for everything <br>
from painting cars, sanding, impact hammers, die grinders, and both media
blasting <br>
cabinets &amp; pressure blasting.=C2=A0 And I&#39;m always running out of a=
ir
and stopping to let<br>
the compressor catch up.<br><br>
So that brings up more questions:<br><br>
1. What really controls how much a comperssor can generate, ie.
SCFM?<br><br>
2. What controls how long your compressor can supply air before having to
start <br>
the motor to refill the tank?=C2=A0 I realize that some air tools use a
LOT more air, but<br>
I&#39;m speaking for any given tool, not compairing something like spray
painting to <br>
undoing 5 lugnuts on a car.=C2=A0 <br><br>
3. Why is a bigger tank better?=C2=A0 After the compressor&#39;s pressure
switch kicks on, <br>
doesn&#39;t it take longer for the compressor to reach the shut off pressur=
e
with a <br>
larger tank?<br><br>
4. How can a 1.7 hp compressor deliver a peek of 175 psi and a regulated
155 psi <br>
when my 5 hp can only charge to 125 psi.=C2=A0 I realize part of that is
due to the <br>
pressure switch, mine is 110 on - 125 off, but really.=C2=A0 Can I put a
pressure switch in mine and 175 psi.=C2=A0=C2=A0 I don&#39;t really think
so.=C2=A0 Is this more advertising hype like <br>
when they were rating compressors at their starting current vs running
current for <br>
hp?=C2=A0 They could get 7hp of of a 110V motor - NOT!<br><br>
John<br><br>
</font><div id=3D"gmail-m_8777314284171356316DAB4FAD8-2DD7-40BB-A1B8-4E2AA1=
F9FDF2">
<br><br>
<hr style=3D"border:none;color:rgb(144,144,144);background-color:rgb(176,17=
6,176);height:1px;width:99%">
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				This email has been checked for viruses by Avast antivirus software.
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</tbody></table>
<br>
<a href=3D"#m_8777314284171356316_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" wid=
th=3D"1" height=3D"1"> </a></div></div>
<br>
<div>John T. Blair=C2=A0 WA4OHZ=C2=A0=C2=A0=C2=A0=C2=A0 email:=C2=A0
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a></div>
<div>Va. Beach,
Va=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
Phone:=C2=A0 (757) 495-8229</div>
<br>
<div>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 48
TR1800=C2=A0=C2=A0=C2=A0 48 #4 Midget=C2=A0=C2=A0=C2=A0 65 Morgan 4/4
Series V (B1106)</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 75 Bricklin SV1 (#0887)=C2=A0=C2=A0=C2=A0
77 Spitfire=C2=A0=C2=A0=C2=A0 71 Saab Sonett III</div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
65 Rambler Classic</div>
<br>
<div>Morgan:=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.team.net/morgan" target=3D"_blank">
www.team.net/morgan</a></div>
<div>Bricklin:=C2=A0=C2=A0=C2=A0=C2=A0
<a href=3D"http://www.bricklin.org/" target=3D"_blank">www.bricklin.org</a>
</div>
<br>
<div>If you can read
this=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0
- Thank a teacher!</div>
<div>If you are reading it in English - Thank a Vet!!</div>
<br>
<div> From Dennis Prager - The American Trilogy:</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 e pluribus Unum, &quot;from many,
one.&quot;</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 In God We Trust</div>
<div>=C2=A0=C2=A0=C2=A0=C2=A0 Liberty - the=C2=A0 power=C2=A0 of=C2=A0
choosing,=C2=A0 thinking,=C2=A0 and=C2=A0 acting=C2=A0 for=C2=A0 </div>
<div>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0
oneself; freedom=C2=A0 from=C2=A0 control=C2=A0 or=C2=A0
restriction=C2=A0 </div>
<br>
<br>

--000000000000148d5c05c9488a98--

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[email-masked]

--===============8666431353813871573==--

---

From: David Scheidt <[email-masked]>
Date: Wed, 11 Aug 2021 09:15:11 -0500

--===============7440310093176824851==

--000000000000b429e805c9493fce

> heavier cast iron oil-type compressors.

There are two kinds of oil less compressor.  The really loud ones, and the
really quiet ones.  the really loud ones are cheap, which is their only
real redeeming feature (they have no oil in the air, which matters for some
applications, too.).  They have been around a long time, and basically,
they suck.  But they're cheap, so, they sell.

the quiet ones are not cheap, although prices have come down.  The best
known variety are sold by California Air Tools (they're made in china,
don't be fooled by the name.), but lots of people offer similar (or
identical) compressors these days.  For a given set of specs, they're much
of a muchness, and you'd do well to buy based on price, warranty, ease of
purchase, color, or whatever.
They reduce noise by having big pistons running at relatively low speed,
and by having lots of plastic and teflon parts.  They're not going to last
forever, probably a 1000 hours of pump operation.  I've got a little one,
with a 2 gallon tank, which I expect will last me years (it's used to air
up bike tires, dust off parts from time to time, and run a couple trim
nailers.).  On a job site, it'd be dead in a year, but it's likely to get
dropped, stolen, run over by a forklift, or otherwise killed first, so the
pump life span isn't a big a limitaion as it might seem.

If you're running shop tools using loads of air, like sand blasters, etc,
you want an old fashioned oil lubricated pump, rotating as low an RPM as
possible.  If you have lower volume air needs, the quiet compressors are
tempting.

--000000000000b429e805c9493fce
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><span class=3D"gmail-im"><div dir=3D"ltr" class=3D"gmail_a=
ttr">On Tue, Aug 10, 2021 at 1:43 PM old dirtbeard &lt;<a href=3D"mailto:di=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt; wrote:<br>=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Hi=
 John,<div><br></div><div>The
 oil-less compressors probably are good enough for casual use, but the=20
ones that I have been around were noisy, probably because they tend to=20
have aluminum blocks and that they tend to spin at higher RPM than the=20
larger, heavier cast iron oil-type=C2=A0compressors.</div></div></blockquot=
e><div><br></div></span><div dir=3D"ltr">There
 are two kinds of oil less compressor.=C2=A0 The really loud ones, and the=
=20
really quiet ones.=C2=A0 the really loud ones are cheap, which is their onl=
y=20
real redeeming feature (they have no oil in the air, which matters for=20
some applications, too.).=C2=A0 They have been around a long time, and=20
basically, they suck.=C2=A0 But they&#39;re cheap, so, they sell.</div><div=
 dir=3D"ltr"><br></div><div>the
 quiet ones are not cheap, although prices have come down.=C2=A0 The best=
=20
known variety are sold by California Air Tools (they&#39;re made in china,=
=20
don&#39;t be fooled by the name.), but lots of people offer similar (or=20
identical) compressors these days.=C2=A0 For a given set of specs, they&#39=
;re=20
much of a muchness, and you&#39;d do well to buy based on price, warranty,=
=20
ease of purchase, color, or whatever.=C2=A0 <br></div><div>They reduce nois=
e=20
by having big pistons running at relatively low speed, and by having=20
lots of plastic and teflon parts.=C2=A0 They&#39;re not going to last forev=
er,=20
probably a 1000 hours of pump operation.=C2=A0 I&#39;ve got a little one, w=
ith a 2
 gallon tank, which I expect will last me years (it&#39;s used to air up=20
bike tires, dust off parts from time to time, and run a couple trim=20
nailers.).=C2=A0 On a job site, it&#39;d be dead in a year, but it&#39;s li=
kely to=20
get dropped, stolen, run over by a forklift, or otherwise killed first,=20
so the pump life span isn&#39;t a big a limitaion as it might seem.=C2=A0 <=
br></div><div><br></div><div>If
 you&#39;re running shop tools using loads of air, like sand blasters, etc,=
=20
you want an old fashioned oil lubricated pump, rotating as low an RPM as
 possible.=C2=A0 If you have lower volume air needs, the quiet compressors=
=20
are tempting.=C2=A0 <br></div><br><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div><div id=3D"gmail-m_-962144170275894706gmail-m_73231821859=
80991174gmail-m_-911417382658544781DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><t=
able style=3D"border-collapse:collapse;border:medium none"><tbody><tr><td s=
tyle=3D"border:medium none;padding:0px 15px 0px 8px"><br></td><td><br></td>=
</tr></tbody></table></div></div></blockquote></div></blockquote></div>

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[email-masked]

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---

From: Arvid <[email-masked]>
Date: Wed, 11 Aug 2021 10:37:51 -0500

This is a multi-part message in MIME format.
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--------------A19C789870EC4AD7D2C791DF
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Agree with the "as low an RPM as possible". When I bought mine they offered a muffler\silencer for the intake. Google and YouTube offer a lot of suggestions for DIY silencers. I highly recommend anything on the intake along with the the standard filter.

On 8/11/21 9:15 AM, David Scheidt wrote:
>
>     Hi John,
>
>     The oil-less compressors probably are good enough for casual use, but the ones that I have been around were noisy, probably because they tend to have aluminum blocks and that they tend to spin at higher RPM than the larger, heavier cast iron oil-type compressors.
>
>
> There are two kinds of oil less compressor.  The really loud ones, and the really quiet ones.  the really loud ones are cheap, which is their only real redeeming feature (they have no oil in the air, which matters for some applications, too.).  They have been around a long time, and basically, they suck.  But they're cheap, so, they sell.
>
> the quiet ones are not cheap, although prices have come down.  The best known variety are sold by California Air Tools (they're made in china, don't be fooled by the name.), but lots of people offer similar (or identical) compressors these days.  For a given set of specs, they're much of a muchness, and you'd do well to buy based on price, warranty, ease of purchase, color, or whatever.
> They reduce noise by having big pistons running at relatively low speed, and by having lots of plastic and teflon parts.  They're not going to last forever, probably a 1000 hours of pump operation.  I've got a little one, with a 2 gallon tank, which I expect will last me years (it's used to air up bike tires, dust off parts from time to time, and run a couple trim nailers.).  On a job site, it'd be dead in a year, but it's likely to get dropped, stolen, run over by a forklift, or otherwise killed first, so the pump life span isn't a big a limitaion as it might seem.
>
> If you're running shop tools using loads of air, like sand blasters, etc, you want an old fashioned oil lubricated pump, rotating as low an RPM as possible.  If you have lower volume air needs, the quiet compressors are tempting.
>
>
>         	
>
>
> Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/[email-masked]
>

--------------A19C789870EC4AD7D2C791DF
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <p>Agree with the "as low an RPM as possible". When I bought mine
      they offered a muffler\silencer for the intake. Google and YouTube
      offer a lot of suggestions for DIY silencers. I highly recommend
      anything on the intake along with the the standard filter.<br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 8/11/21 9:15 AM, David Scheidt
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr"><span class="gmail-im">
          <div dir="ltr" class="gmail_attr">On Tue, Aug 10, 2021 at 1:43
            PM old dirtbeard &lt;<a href="mailto:[email-masked]"
              target="_blank" moz-do-not-send="true">[email-masked]</a>&gt;
            wrote:<br>
          </div>
          <blockquote class="gmail_quote" style="margin:0px 0px 0px
            0.8ex;border-left:1px solid
            rgb(204,204,204);padding-left:1ex">
            <div dir="ltr">Hi John,
              <div><br>
              </div>
              <div>The oil-less compressors probably are good enough for
                casual use, but the ones that I have been around were
                noisy, probably because they tend to have aluminum
                blocks and that they tend to spin at higher RPM than the
                larger, heavier cast iron oil-type compressors.</div>
            </div>
          </blockquote>
          <div><br>
          </div>
        </span>
        <div dir="ltr">There are two kinds of oil less compressor.  The
          really loud ones, and the really quiet ones.  the really loud
          ones are cheap, which is their only real redeeming feature
          (they have no oil in the air, which matters for some
          applications, too.).  They have been around a long time, and
          basically, they suck.  But they're cheap, so, they sell.</div>
        <div dir="ltr"><br>
        </div>
        <div>the quiet ones are not cheap, although prices have come
          down.  The best known variety are sold by California Air Tools
          (they're made in china, don't be fooled by the name.), but
          lots of people offer similar (or identical) compressors these
          days.  For a given set of specs, they're much of a muchness,
          and you'd do well to buy based on price, warranty, ease of
          purchase, color, or whatever.  <br>
        </div>
        <div>They reduce noise by having big pistons running at
          relatively low speed, and by having lots of plastic and teflon
          parts.  They're not going to last forever, probably a 1000
          hours of pump operation.  I've got a little one, with a 2
          gallon tank, which I expect will last me years (it's used to
          air up bike tires, dust off parts from time to time, and run a
          couple trim nailers.).  On a job site, it'd be dead in a year,
          but it's likely to get dropped, stolen, run over by a
          forklift, or otherwise killed first, so the pump life span
          isn't a big a limitaion as it might seem.  <br>
        </div>
        <div><br>
        </div>
        <div>If you're running shop tools using loads of air, like sand
          blasters, etc, you want an old fashioned oil lubricated pump,
          rotating as low an RPM as possible.  If you have lower volume
          air needs, the quiet compressors are tempting.  <br>
        </div>
        <br>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div class="gmail_quote">
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
              0.8ex;border-left:1px solid
              rgb(204,204,204);padding-left:1ex">
              <div>
                <div
id="gmail-m_-962144170275894706gmail-m_7323182185980991174gmail-m_-911417382658544781DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
                  <table style="border-collapse:collapse;border:medium
                    none">
                    <tbody>
                      <tr>
                        <td style="border:medium none;padding:0px 15px
                          0px 8px"><br>
                        </td>
                        <td><br>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                </div>
              </div>
            </blockquote>
          </div>
        </blockquote>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________

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[email-masked]

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From: David Scheidt <[email-masked]>
Date: Wed, 11 Aug 2021 10:45:59 -0500

> 1. What really controls how much a comperssor can generate, ie. SCFM?

Actual power available from the motor, more or less.  More power, more air.

>
> 2. What controls how long your compressor can supply air before having to start
> the motor to refill the tank?  I realize that some air tools use a LOT more air, but
> I'm speaking for any given tool, not compairing something like spray painting to

Size of tank, the pressure of the stored air, and the settings on the
pressure switch.
Bigger tank means longer run time before the compressor kicks in,
higher pressure means longer run time before the compressor starts.
Pressure switch controls when it comes on, so there can be more or
less usuable air in the tank.  Most tools are limited to 90 psi, so as
long as the system pressure is above that, the compressor doesn't need
to run.  In industrial settings, where there can be strict
requirements about air pressure, the cut in pressure can be different.
I used to work in a shop with three compressors ganged together, and
they were set up with different cut in pressures.  First one would
come on, and if pressure kept falling, the second would start; more
pressure drop, the last one cut in.  They'd all run until 175 psi was
reached.

Siz>
> 3. Why is a bigger tank better?  After the compressor's pressure switch kicks on,
> doesn't it take longer for the compressor to reach the shut off pressure with a
> larger tank?

It holds more air which lets you have surge capacity that uses more
air than your compressor produces, at least for a little while.
It also gives the air longer to cool down, which lets water condense out of it.

>
> 4. How can a 1.7 hp compressor deliver a peek of 175 psi and a regulated 155 psi
> pressure switch, mine is 110 on - 125 off, but really.  Can I put a pressure switch in mine and 175 psi.   I don't really think so.  Is this more advertising hype like
> when they were rating compressors at their starting current vs running current for

Pump design, and how its been chosen to be driven.  Higher pressure
means  more storage in a tank, and more pressure to overcome pressure
drop in lines.  the last shop I worked in, I was 75 pipe feet or more
away from the compressors, I had to set the regulator at my drop to
130psi to get a running psi of 90 or so on my impact gun.  The lift
closest to the compressor, I could turn it down to 95 or 100.  In
tuned industrial applications, pumps are often run at less than
maximum capacity, for less noise, less power use, and longer life.

-- 
David Scheidt
[email-masked]

[email-masked]