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40's Ford Drum Question

Discussion in 'The Hokey Ass Message Board' started by ratryan, Apr 30, 2012.

  1. ratryan
    Joined:
    Apr 8, 2010
    Posts:
    13
    Location:
    NM

    ratryan Member

    Hey all,

    I have some Ford 40's drums I came across that will need turned. What is max ID for the drum, meaning when is it still usable V.S. when is there no life left? I've not been able to find and spec's anywhere on what a good/average ID should be for these.

    Thanks in advance!!!

    ~Ryan
    Last edited: Apr 30, 2012
  2. 19Fordy
    Joined:
    May 17, 2003
    Posts:
    4,402
    Location:
    Coral Springs, FL

    19Fordy Member

    Typically 12.060 is the max for safely turning '40 brake drums. However, lots of guys go to
    12.090, like the aftermarket '39 Lincoln brake package sold by MT Brake product shown on the left below. I would stay with 12.060 in. The stock '40 drum is shown to the right.

    Attached Files:

    Last edited: Apr 30, 2012
  3. ratryan
    Joined:
    Apr 8, 2010
    Posts:
    13
    Location:
    NM

    ratryan Member

    Thank you sir!! Take it easy!

    ~Ryan
  4. Charlie Stephens
    Joined:
    Sep 27, 2008
    Posts:
    1,705
    Location:
    Southern Calfornia

    Charlie Stephens Member

    The 12.090 on the drum shown means that specific drum was designed to be turned that much, not that it is safe to turn the standard drum that much. I have always heard 12.060 unless otherwise marked.

    Charlie Stephens
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