[Shop-talk] More compressor questions

Tue Aug 10 14:40:05 MDT 2021

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 <marka at maracing.com> 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.
>
> 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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