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Thread: Speedo Worm Gear

  1. #1
    Join Date
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    Default Speedo Worm Gear

    Does anyone have an catalog info for a speedo worm gear stamped with the following number SW 447516? I'm assuming Stewart-Warner for the "SW". I've searched the web and no luck. The gear looks like its an 8tpi (for '62-'69 4-speeds). Hoping someone can help me ID the gear.

    Thanks, William
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    William Edwards, AMCA #10035

    Attend the 2018 Southern National Meet at Denton Farmpark, NC, 18-19 May 2018
    http://www.amcasouthernnationalmeet.com/

  2. #2
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    I checked the worm gear with a pitch gauge and it measures 9 tpi. Odd thread count as Palmer's book doesn't reference a 9 tpi gear unless I missed somewhere else in his book. Palmer's 4 tpi (E'62-'69 w/ 13T drive), 7 tpi ('36-'61 w/ 7T drive & '69-'80 w/ 23T drive), 8 tpi copper plated (L'61 w/ 23T drive) and 20 tpi ('37-'52 45" solos).
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    Last edited by wideglide38; 06-10-2018 at 09:34 AM.
    William Edwards, AMCA #10035

    Attend the 2018 Southern National Meet at Denton Farmpark, NC, 18-19 May 2018
    http://www.amcasouthernnationalmeet.com/

  3. #3
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    Default

    Palmer's references are not TPI, they are total number of teeth machined on the gear. Count the ends of the spirals.
    Robbie Knight Amca #2736

  4. #4
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    Thanks, you're right. Spiral end count is 4.
    William Edwards, AMCA #10035

    Attend the 2018 Southern National Meet at Denton Farmpark, NC, 18-19 May 2018
    http://www.amcasouthernnationalmeet.com/

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