Question about cfm ratings on air compressor

[hondacivic247]

So i know manufacturers make it tricky with all different cfm ratings at different psi. I have a Rolair k25 pump and the specs list as CFM displaced 18.2, 100psi/16.2, 175psi/14.26cfm

My question is what's the cfm displaced mean? I understand the cfm ratings at different psi. The pump runs quite well with a 5hp 56y frame century electric motor on 230v it fills the 60 gallon tank in 5 mins flat. I'm possible selling it tmrw to a guy and looking for a higher cfm compressor on Craigslist to come to buy. Bought this compressor for 275 bucks put 70 into a new aftercooler and paint and put it for sale for $700

 

[Snapped-off]

Cubic Feet per Minute; I believe what you're asking is what that means?

Imagine a 1'x1'x1' box. Your compressor could fill up 16.2 of those boxes at 100 psi in one minute.

Hope that's what you're asking.

 

[A_Pmech]

CFM displaced is the displacement of the cylinder times the RPM. In other words, how much air the machine would deliver if it was 100% efficient.

It's a pointless metric.

 

[hondacivic247]

Thanks for the info