[Shop-talk] More compressor questions

[Mark Andy]

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 <dirtbeard at gmail.com> 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.
>
> 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 <jblair1948 at cox.net> wrote:
>
>>
>> Thanks again for all the replies to my original post about my compressor
>> motor
>> not working.
>>
>> With all this going on, I have been doing some thinking about having to
>> 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.
>> Based on the info in the manual, it appears that all 3 versions have the
>> same
>> SCFM specs.
>>
>> My current compressor is an oil lubricated one.
>>
>> 2. I see oil-less compressors that supposedly have fantastic specs for
>> air supply
>> 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
>> reading an
>> article that was talking about how the oil-less versions have come a long
>> ways.
>> They were saying that the biggest advantage for the oil liubes was for
>> 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
>> compressor back in the 60s and it was still running when he passed in
>> 2015.  I
>> bought mine back about '90.  So I lean toward them.  But is that
>> realistic?
>>
>> John
>>
>>
>>
>>
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>> John T. Blair  WA4OHZ     email:  jblair1948 at cox.net
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