Tool Air compressor fill time sanity check
- Thread starter David_R8
- Start date
Tool
No idea. Never timed my Sears unit. I jump every time the big one starts up thought. Although I doubt that information helps...
Yes, recall me jumping when yours started up!
Tom Kitta
Ultra Member
CFM's your Air Compressor can Produce
Calculate the actual cfm's of your Air Compressor
www.spikevm.com
No, seems too slow.
quite reasonable.
Calculator at
www.bosscompressor.com
conversion calculators are at the bottom if the page. Also keep in mind temperature has a huge effect on air delivery, and so will humidity.
Calculator at
High-Performance Screw Air Compressors for Industries
Online calculator to find out volume of air (CFM) of air compressor
www.bosscompressor.com
conversion calculators are at the bottom if the page. Also keep in mind temperature has a huge effect on air delivery, and so will humidity.
Tom Kitta
Ultra Member
So this would mean that your compressor fills in faster from 90 psi to 125psi than from 0 to 90 psi - which is not exactly possible. I think you need to check your time again. Or your pressure gages are off. 6 min from 0 to 90 PSI would imply just over 50% of stated pump ability at 90 psi.
Is the motor on it original? Spinning at the correct rpm? Belts tight enough to not slip?
~6cfm seems slightly low I'd expect more like 8-9cfm. Check the discharge tube from pump to check valve when it's cold with soapy water and the pump first kicks in to see if it's leaking at a connection.
~6cfm seems slightly low I'd expect more like 8-9cfm. Check the discharge tube from pump to check valve when it's cold with soapy water and the pump first kicks in to see if it's leaking at a connection.
That was done with glass bead. Granules are about the size of salt.
https://www.princessauto.com/en/50-lb-greengrit-crushed-glass-blasting-abrasive/product/PA0008223794
I had to dry it out because it was quite damp and clumped something awful. Now that its dry it works very well.
25+ years ago I had a shop and lived beside Kelso Conversation Area. I owned several large compressors for my drilling business (300 to 425 Hp). The Kelso snow making equipment (for the ski hill) was 150psi. After doing modifications to their air lines (lots of 2” to 6” piping), they had to test it to over 200psi but their compressors were limited to 175psi. As a good neighbour, I often let them borrow my 750cfm/300psi compressor to pressure test their pipes. I was surprised at how much fuel was required. It took over 3 hours with the 750 compressor running full-out to pressure test their system.
David what make and model is your compressor? Some of the companies like Colman and husky exaggerate the cfm of their pumps. Even really good companies do that too.I measured my atlas copco and it wasn't getting to the advertised CFM. In that case I might have been under driving the pump.
@Alexander it is a Husky pump and motor so there is that
In truth, the additional 20 gallons of air makes a huge difference when using my benchtop blasting cabinet. Overall I'm quite happy with the setup.
I have a total of $475 into it.
I'll sell the two original Speedaire pumps and motors so my total investment may end up $250 range.
Separated the two tanks this afternoon. Checked belt tension.
Turns out the belt was loose, likely because it was brand new so has worn in.
Cut the 0-60 psi time in more than half; 3 mins vs 1:22.
Time to 125 psi is now 3:22 on a single tank.
That’s a massive improvement.
Turns out the belt was loose, likely because it was brand new so has worn in.
Cut the 0-60 psi time in more than half; 3 mins vs 1:22.
Time to 125 psi is now 3:22 on a single tank.
That’s a massive improvement.
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