Vintage Bass Machine Heads (142 Series) Gear Ratio

Discussion in 'Hardware, Setup & Repair [BG]' started by LowNloud1, Dec 5, 2015.

  1. LowNloud1

    LowNloud1 Commercial User

    Jun 11, 2012
    Wilmington NC
    I am a hobbyist making stone picks that I sell but mostly give away. They made me do this anyways.
    I looked at the Grover specs and could not find any reference as to what the gear ratio is for this tuner. They are on my Gibson SG 2013. This is the Vintage Elephant Ear or Clover style. Gibson calls it Shamrock.

    Does anyone know?
  2. megafiddle


    May 25, 2011
    If you can't find a spec:

    If the backs are open, just count the teeth on the ring gear. The worm gear has one tooth effectively, so the ratio equals the number of ring gear teeth.

    If not open back, remove a string from the post, attach a pointer to the post and align the pointer with a convenient reference point. Then count number of tuning key turns required to return the pointer to it's starting point.

  3. Turnaround

    Turnaround Commercial User

    May 6, 2004
    Toronto Canada
    Independent Instrument Technician
    I tried this. It didn't take any turns at all to return the pointer to it's starting point. Do I need a shim?

    Sorry - couldn't resist.
    MarkoYYZ, megafiddle and sissy kathy like this.

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