40HP RPC bearing size
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  1. #1
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    Default 40HP RPC bearing size

    Anyone know what bearing size the AD-40 RPC (American Rotary) uses?
    I would like to have the bearings in hand before tearing down the motor.
    AR only provides the part #, not the actual bearing #.

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    sometimes its on the motor nameplate.

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    Quote Originally Posted by johansen View Post
    sometimes its on the motor nameplate.
    Ya. Looked there also.
    AR wants $400/pair. That seem right for that motor size?

    Sent from my SM-G975U using Tapatalk

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    Frame size? Maybe 324T? Out put shaft is 2.125 - which means the bearing bore is somewhat larger than 2.125.

    Here is an example WITH bearing sizes - for 324T.

    Not necessarily YOUR bearing sizes

    https://www.alliedelec.com/m/d/51314...4c65b91c1f.pdf

    have fun - you probably know you can look in the electrical section of Machinery's Handbook and find out what your frame size is by measuring the motor

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    Tearing down the motor is no big deal. Done it many times, too many. You're going to have to do it anyway.

    Procedure:
    1. Unbolt the two end bell covers.
    2. Use a little heat on the covers to make the bearing hole larger.
    3. Remove covers one at a time.

    You think that is the worst part right? Wrong.

    You have to remove the original bearings off the rotor. I always have to devise a fixture for that and either use some heat or pressing a op.
    Last edited by rons; 12-30-2021 at 09:45 AM.

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    Quote Originally Posted by claya View Post
    Ya. Looked there also.
    AR wants $400/pair. That seem right for that motor size?

    Sent from my SM-G975U using Tapatalk
    Go call Motion Industries to see what AR's profit margin is...

    I would part the case and flush the original bearings with acetone or lacquer thinner. Then inject the grease. Can eliminate a costly guess so.

    If they are rubber sealed I've heard that a rubber side can be popped off and then pushed back on after a cleaning. Have not done that myself.

    I replace my motor bearings with totally sealed ones. Reason is less atmospheric/particle contamination.
    Last edited by rons; 12-30-2021 at 04:16 PM.


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