[Shop-talk] More compressor questions

[Pat Horne]

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

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’t last as long. 

If you are using lots of air & your budget allows,  consider a 2 stage compressor. 

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 died. I purchased an oil lubricated unit to replace it. 

If you are mainly using air tools & not painting, I’d go with oil. Most of my usage is air tools & media blasting. When we needed to paint a vehicle we just added an oil separator & filter. Worked fine. 

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On Aug 10, 2021, at 1:25 PM, 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




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



John T. Blair  WA4OHZ     email:  jblair1948 at cox.net
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!!

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


_______________________________________________

Shop-talk at autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation  $12.96
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive

Unsubscribe/Manage: http://autox.team.net/mailman/options/shop-talk/patintexas@icloud.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/shop-talk/attachments/20210810/18c154c6/attachment.htm>