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re-skimming brake disc - min thickness and tips?


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Was going to throw my discs onto a lathe as they are a bit rusty from lack of use. I think they aren't that worn and I have access to a lathe hence giving it a go.

Does anyone know the min thickness of the vented 240mm sierra discs? I did a quick google and one set i saw said 22mm min does that sound right? I looked in the sierra manual but it doesn't specify.

I only have access to HSS cutters. Will these be ok. What shape is best? a roughing tool (rounded end)?



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thanks both. I've had another look at them and not as bad as i first thought. They are pretty flat, no grooves etc so might just give them a quick sand so i don't cover my alloys in brown rusty dust on first drive.

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