Use this older air compressor

by Vittorio Bares
(New Hampshire)

Electric Motor

Electric Motor

Electric Motor
Compressor Numbers
Tank and compressor
Other numbers on the compressor

This tank is from a friend. Not much info on it, except his dad re-built it years ago and it has sat since. Not much identifying info on it...would like to put it back into service...


So, among other things, Need to understand electric motor pulley size.

Comments for Use this older air compressor

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Apr 28, 2015
Model 705
by: VB

Just looked at the head configuration in the manual (http://www.nhproequip.com/PDFs/Saylor-Beall-700-Series-AirCompressor-Pumps-Manual.pdf
). The 703 has 1 intake and 3 exhaust, 705 has 2 intake and 3 exhaust - so this one is a 705.

Apr 04, 2015
Model 703
by: Timbo

The pump is a Saylor Beall model 703. It's actually a 3hp pump. That motor will work just fine.

Jan 17, 2015
5hp pump
by: Anonymous

That's a 5hp pump when running at it's rated speed. You are probably going to have to run it pretty slow with a 3hp motor. I'd probably shoot for 500rpm on the pump and see what amps the motor is pulling at cut out. This pump will do 175psi, but to get there with an undersized motor means you will have to sacrifice some cfm to do it. Your call. The motor can only do so much work, especially when it is already a bit too small, so you can get max cfm at a lower cut out pressure, or go for a higher pressure and lose some air output. That is either a Saylor Beall 705, or more likely a Chinese knockoff of one.

To calculate pulley size, just multiply the o.d. of the flywheel in inches by the desired rpm of the pump, then divide by the motor rpm and that will give you your motor pulley o.d. in inches.

Jan 11, 2015
Not much to go on here...
by: Doug in s.d.ca

Can you tell anything about the compressor?

Are there pulleys for either the motor or pump?

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