[Shop-talk] More compressor questions

[old dirtbeard]

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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