Which rotor does GE 8B52 timer use?

Discussion in 'Electric Horology' started by Chris, Aug 24, 2016.

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  1. Chris

    Chris Registered User
    NAWCC Business

    Nov 4, 2001
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    Clock and phonograph repair
    Ellsworth, Maine
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    I have an 8B52 clock / timer from the '30's in for repair and something is wrong. The rotor is working, but the clock is very slow. Does it take the typical B rotor at 1 rpm? Thanks!
     
  2. Chris

    Chris Registered User
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    Nov 4, 2001
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    Clock and phonograph repair
    Ellsworth, Maine
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    Anyone have an answer?
     
  3. eskmill

    eskmill Registered User
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    Aug 24, 2000
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    I suspect the GE/Telechron 8B52 Radio Timer uses the H or S 3.6 RPM (60 Hz) rotor. I think this is a post-WWII production.

    Show a photo of the motor/rotor and assembly when asking for assistance.
     
  4. davefr

    davefr Registered User
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    Nov 29, 2008
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    #4 davefr, Sep 2, 2016
    Last edited: Sep 2, 2016
    It uses the short tail BF style rotor with 36 tooth, 9/16" O.D. pinion gear. (1 RPM)

    http://www.telechronclock.com/wpimages/wp1124d178_06.png

    BF rotor's are pretty low torque so both the rotor and clock movement need to be in good condition.
     

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