Century 5hp motor for compressor swap

[Tarnished]

Picked up this Century 5hp 1745rpm 1ph 220v motor at auction today and was hoping someone here can tell me something about it. It spears new and unused. Doesn't show any marks of being wired, or having pulley mounted.
I am hoping to use this to replace the 5hp 3ph on a Quincy 325 compressor I have been waiting to rebuild. Any information on this motor or this application would be appreciated.

 

[RivennHewn]

http://www.centuryelectricmotor.com/Applications/AdvanceCatalogSearch.aspx

I was just searching a part for my Century motor.

 

[laser3kw]

uh-oh
someone said "220 volt"

 

[G_P]

That should work just fine as a replacement for your 3ph motor.

 

[Norcal]

uh-oh
someone said "220 volt"

And if you don't know what voltages your working with, you should not be doing electrical, "220" is a ignorant term unless your in the parts of the world that still uses it. North America is not one of those parts of the world.


Was going to refrain from commenting.

 

[laser3kw]

Was going to refrain from commenting.

(gotcha!)

 

[RivennHewn]

220 / 221, what ever it takes

 

[Tarnished]

http://www.centuryelectricmotor.com/Applications/AdvanceCatalogSearch.aspx

I was just searching a part for my Century motor.

That should work just fine as a replacement for your 3ph motor.

Thanks Riven & G_P,
That is the kind of help I was hoping for. Any one have any experience with Century motors? Good or bad?

 

[Norcal]

They have had a few ownership changes over the years, but as far as I know they are OK.

 

[Strouty]

Nice score, you should be fine regardless of what the volts police tell you.

 

[wyliesdiesels]

If your compressor has a starter, which it should because the pressure switch is most likely not rated for 5hp, then u will need to change the heaters/ overloads in the starter.

Also, if it has a solid state overload relay with phase loss monitoring, some wiring will have to be changed. Why dont u post some pics...

The wiring to the compressor might be too small as well since a 3phase motor will have lower FLC than a single phase motor and this compressor should be hardwired.

 

[CompressorPros.com]

You will also want to make sure you size your drive pulley correctly to get the right RPM for your compressor pump. You can figure what the pump rpm if you know the original motor RPM and drive pulley size and the flywheel diameter. Take the motor RPM x drive pulley diameter and divide by the flywheel diameter. That will give you the target pump rpm...use the formula to figure the necessary drive pulley size once you know the pump rpm...take pump rpm x flywheel diameter and divide that by the motor RPM

 

[James-W]

I am a little confused. I thought compressor motors were usually 3,450 RPM's and not 1,725 RPM's.

 

[toplessHO]

Having been around long enough to have seen all of the various voltage
ratings of motors 110,115,120, 208,220,230,240,440,460,480. and now the 200v rating too.
I can tell you that just about any description is ok. The rest is splitting hairs.

 

[Tarnished]

Having been around long enough to have seen all of the various voltage
ratings of motors 110,115,120, 208,220,230,240,440,460,480. and now the 200v rating too.
I can tell you that just about any description is ok. The rest is splitting hairs.

+1, but then there are many things I am "ignorant" on. This is just another one.
Picked up a Quincy 325 r13 about a year ago. Unfortunately it was 3ph, and I originally intended to use a RPC to power it. Most advice is not to run compressor on RPC, so I have been on the lookout for a 5hp 1725 1ph motor for cheap for a while. Think I found it.
As for the pulley issue, I understand, and that is one thing that has held me up. Now I have motor with same size shaft, (1-1/8) and same rpm, (1725) so pulley swap should be a pretty straight forward.
Haven't done a lot to the Quincy yet, just a overall cleanup so far while waiting for motor to show up. I did pick up a new starter for the 3ph motor, but will have to check if it will work with the new 1ph. Hopefully just new heaters. Have picked up all the copper piping , but still need fitting. Plan to make this my winter shop project.
Pics of the compressor as found, motor plate and starter

 

[RivennHewn]

I put a bunch of effort into a '64 Binks, only to find out the tank was rusted out.

Have you pumped it up yet?

 

[Tarnished]

I put a bunch of effort into a '64 Binks, only to find out the tank was rusted out.

Have you pumped it up yet?

Rivenn, The compressor was working and under pressure when I brought it home about a year ago. I haven't tested it since, but I will before I
install the motor. Can pressure it up with my existing compressor for leak test. Would HATE to do all that work to find out I need a new tank.

 

[Trey T]

Looks like a typical 1800rpm 5HP motor comparable to today's Baldor 1800rpm 5HP motor w/ 1-1/8" shaft (guessing here). 1-1/8" shaft is a beefy shaft, larger than the 3600rpm 5hp motors.

I have a Century (US made) 3600rpm 5hp motor w/ slightly smaller shaft.

PERFECT FIT TO YOUR QUINCY 325.

 

[Tarnished]

Looks like a typical 1800rpm 5HP motor comparable to today's Baldor 1800rpm 5HP motor w/ 1-1/8" shaft (guessing here). 1-1/8" shaft is a beefy shaft, larger than the 3600rpm 5hp motors.

I have a Century (US made) 3600rpm 5hp motor w/ slightly smaller shaft.

PERFECT FIT TO YOUR QUINCY 325.

Thanks Trey, That is what I was hoping to hear. Got a few more parts to line up, and a few more projects to clear out of the way, but this is going to be my winter project. New AIR system for the SSS.