# possible early 60's compressor??

by Stephen Gilbert

identifying this old air compressor

need help identifying this air compressor. Someone suggested that it might be a refrigeration compressor converted. bought this at an auction and it has a 3/4HP engine made by Teco (Eatons of Canada) dating to 1962 (maybe earlier).

Compressor pump has a cast a number stamped on the side 6B3C. bottom body has a casting number of F49520. There's 2 holes on the other side that look like that's where an ID plate should go.
there are no decals or ID plates on the tank or pump, just the motor.

my other question is do you think the pump could handle a 3 or 5HP motor??

Thanks!!

### Comments for possible early 60's compressor??

 Sep 09, 2014 Measure the Cylinders by: Anonymous First, it's a single stage compressor, so don't run it much higher than 125psi or you will get more heat than compressed air.Second, it looks like an old air brake compressor, maybe a Bendix. It is designed to be water cooled, so don't expect to run this hard for hours on end with no water cooling.Third, to calculate the horsepower required for an air compressor, take all of the FIRST STAGE displacement in cubic inches and divide by ten.Displacement of a cylinder = .7854 X diameter X diameter X stroke, all in inches. If there is more than one first stage, you must add up all of the cylinders to find the HP rating using this method. For instance, if you have a 3 cylinder compressor and it is a single stage unit, then you would add up the total displacement of all three cylinders in cubic inches and divide by ten. If you have a 3 cylinder compressor with two first stage cylinders and one second stage cylinder, you would total up the displacement of the first two cylinders only. This is a rule of thumb when trying to decide how much horsepower a compressor head is designed for. As always, amp draw will be the limit as to how fast you will be able to run the pump and to what cut-out pressure, but generally speaking, reciprocating compressors like to be at 1000rpm or less.

 Sep 08, 2014 Motor by: Doug in s.d.ca What do you mean by "handle" a 3-5hp motor?If the speed and pulleys are correct, you can use a 100hp motor. Won't change much of anything except the weight of the thing.