| blarge | -- 10-23-2017 @ 2:59 PM |
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I am putting new brakes on the rear of my 48 Mercury. The rear drums needed turning, and it took .075 ( seventy five thousands) to clean them up. Is it OK to use these drums cut .075 over size? Bill Large
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| Greg58 | -- 10-23-2017 @ 7:45 PM |
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That is a lot, somewhere on the drum you should find the max. measurement, the problem will be lack of contact surface. I think the thickness of the drum will be OK but the shoes will have to wear more to have correct stopping power. If you take too much metal out the shoe will not touch the drum closer to the end at first. Greg This message was edited by Greg58 on 10-23-17 @ 7:46 PM
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| CharlieStephens | -- 10-23-2017 @ 8:08 PM |
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Bill, I don't think you will find the maximum on the drum, they weren't doing that at that time. Generally .060 is considered max (unless otherwise marked). Depending on what state you are in (you should put it in your profile) there may be a legal max. The shops I talked with won't turn beyond 060, sort of an unofficial "industry standard". I think I would start looking for new drums. Question for you, are the drums the same as Ford? Charlie Stephens This message was edited by CharlieStephens on 10-23-17 @ 8:25 PM
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| supereal | -- 10-24-2017 @ 2:16 PM |
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The Ford and Merc used the 21A-1112-L. They look like the Lincoln drums. While cutting the drums beyond the .060 limit usually doesn't impair the use, they may require refitting the brake shoes to gain full contact.
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