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Old 04-30-2012, 09:48 AM   #1
ratryan
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Join Date: Apr 2010
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Default 40's Ford Drum Question

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 by ratryan; 04-30-2012 at 04:37 PM.
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Old 04-30-2012, 10:19 AM   #2
19Fordy
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Default Re: 40's Ford Drum Question

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.
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Last edited by 19Fordy; 04-30-2012 at 10:30 AM.
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Old 04-30-2012, 11:22 AM   #3
ratryan
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Default Re: 40's Ford Drum Question

Quote:
Originally Posted by 19Fordy View Post
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.
Thank you sir!! Take it easy!

~Ryan
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Old 04-30-2012, 12:27 PM   #4
Charlie Stephens
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Default Re: 40's Ford Drum Question

Quote:
Originally Posted by 19Fordy View Post
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.
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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