Single phase motor
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Thread: Single phase motor

  1. #1
    Gunco Member ak1st's Avatar
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    Default Single phase motor

    I was just given a old Century electric motor, 1/2 hp, 115/230v, single phase. I would like to put this motor on my bandsaw, but the motor runs clockwise. My bandsaw requires the motor to run counter clockwise. Anyone have any experience on reversing the rotation on one of these motors?

  2. #2
    Administrator pirate56's Avatar
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    there should be some wiring diagrams on the cover for the wires. if not check either the motor manufacturers or graingers web site.


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    Always sore, always tired Bradrock's Avatar
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    A picture of the terminal block & one of the guys could tell you better. Does it have a big capacitor on the outside?
    " Save a tree...........Eat A Beaver!"

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    Gunco Member ak1st's Avatar
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    Here is some additional information on the motor:
    Make: Century electric
    Type: CS
    cy: 60
    v: 115/230
    hp: 1/2
    rpm: 1140

    I checked the AO Smith website and found a wiring diagram for some older model Century motors. The motor I have is wired for 115 volts and runs fine. The motor is a capacitor start. The website did not say if this motor could be reversed.

  5. #5
    Gunco Veteran Lt762x39's Avatar
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    Ak,

    Unfortunatly alot of the single phase stuff cannot be reversed. You might try a gearbox. here is a site that covers your problem
    http://en.allexperts.com/q/Electric-...ngle-phase.htm

    here is another one
    http://groups.google.com/group/rec.c...471a57d748dd33

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    Gunco Regular JRIVEN00's Avatar
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    I've got a motor chart at work. I'll check that this morning and post.

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    hotbarrel's Avatar
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    the leg the cap is on determins the direction not the incommimg line configuration.
    if you can, put the cap on the other motor leg, motor will reverse.
    hope this helps
    I am off the page for extended times due to job requirements, not gone forever

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    Gunco Regular JRIVEN00's Avatar
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    Remove the cover plate and check the wiring. Leads 5 & 8 govern motor direction. If the motor is running clockwise then leads 1 & 5 will be joined. Connect leads 1 & 8 for the motor to run CCW. If the motor only has 6 leads it is not wired to run either direction. Basically reverse leads 5 & 8 and this will reverse the motor.

  9. #9
    Gunco Member ak1st's Avatar
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    Thanks everyone for the advise and information. My knowledge of electric motors is very limited, so all your advise is greatly appreciated. I will check the wiring again and see how it goes. Thanks again, AK1st

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