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Old 07-29-2020, 03:07 PM   #1
CA Victoria
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Default Oversized Brake Drums

I am working on putting together a set of 1935 Ford mechanical brakes & drums.
There are two different camps when the topic of brake drums comes up.
The warning comes to not use brake drums if turned beyond 12.060 stating it is dangerous. Why?
The folks who have worked on these for years will cite using drums turned well beyond 12.060, none so far can remember a drum failing?

The drums I have turned to 12.100 have about .110 wall thickness.
So is the warning because of drums failing, or overheating, or warping?

Several shoes I have removed have paper like shim material under the lining to compensate for the drum diameter. I have not found thicker woven lining so I have made .030 metal shims to use with woven linings.

Lots more experience here on The Barn than I have.......so do you see any pitfalls with using oversized drums with shimmed linings?
Any one with experience of drums failing?

Thank you!
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