View Full Version : Shop compressor CFM?

03-23-2011, 12:57 AM
A quick question re: appropriate shop compressors to pair with a ShoeBox 4500 psi.

The "Performance" page on the main website lists a requirement of 2 cu ft per min.

One of the compressors I'm comparison shopping is the Thomas Air Pac T-635HD, which is supposed to be reliable and quiet:


The specs page lists several CFM values:

* air displacement of 3.5 CFM
* 1.7 CFM @100 PSI

Which of these CFM values should I be concerned about and would this compressor be suitable to pair with a ShoeBox?

Paul M.

03-23-2011, 03:21 AM
Virtually any oil-less shop compressor will work with a ShoeBox.... It only uses about 0.07 CFM.... However, the bigger the tank and the higher the CFM rating the less the shop compressor will run....


03-23-2011, 11:36 AM
I have a 3 gallon pancake tank model shop compressor that is rated at 0.6 SCFM @ 100 psi. It works, but runs every 3 minutes to jack the pancake tank pressure from 85 psi back to 100 psi. The regulator output pressure varies from 90 to 80 psi (input to the shoebox) as the shop compressor tank fluctuates up & down. The system works like a champ though. My shoebox #314 can pump up my 88 cu ft carbon fiber tank at a rate of approximately 340 psi/hr. I recently pumped my CF tank from 3200 to 4550 psi in 4 hours.

Mark E.

03-28-2011, 01:42 PM
I have to agree with meastman. My Lowes 2 gallon .36 SCFM @ 90 psi works great.
It comes on about every 10 minutes to pump up the tank, but it's small, light, and pretty quiet .