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GlennC1
Novice
Dec 9, 2015, 8:25 AM
Post #1 of 4
(1779 views)
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Resurfacing rotors
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Typically,if a rotor is smooth, has no grooves in it, how much material is removed when it is resurfaced ? I realize it probably varies depending on the particular rotor but what would be an average amount? To ask the question a different way:I have a rotor that has a Minimum thickness stamped 10.9 MM,so what would be the minimum thickness it would have to start out at to not go below 10.9 MM ?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 9, 2015, 8:43 AM
Post #2 of 4
(1774 views)
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Re: Resurfacing rotors
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How much are new ones vs this? You'll lose about 1mm* and another for life of rotor which is much more likely to warp if turned then a new one. Tech's will differ on opinions on this but unless wild price difference and can stay well within spec go new. You lose balance anyway when cutting them if you care,
T
* That can only be a guess. When on machine they may show more runout than you notice and take more off........
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kev2
Veteran
Dec 9, 2015, 8:45 AM
Post #3 of 4
(1772 views)
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Re: Resurfacing rotors
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smooth has no groves - why resurface? Out of round/warp would determine depth of cut.
It was standard practice to turn but no longer, manufacturers do not require/suggest it with pad changes.
do the math labor to turn vs new one, sometimes surprisingly low cost.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 9, 2015, 8:59 AM
Post #4 of 4
(1765 views)
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Re: Resurfacing rotors
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Agree and wonder Kev on that. Yes, they sure can work out fine if still properly done, lubed calipers with just pads and a good safe test drive for initial performance to settle.
They advertise just this at places without looking. It' rusty here if nothing else, friction surface can look excellent and the pull off hub type is all crust inside takes time to scrape clean or it will wobble.
Here - open web I err to new as the suggestion not making a call or know how it will be driven by who and where.
I'll do just pads and service my own calipers without turning when pads are 1/2 or less worn because they feel tons better on the new side then worn no rust on long owned since they were new or a clunker would toss them. Many just don't cost that much new vs (I pay as I don't have the lathe) about $40-$50 and so close to new taint worth it.
This speaks only for me, my use 99.9% below 30MPH that felt perfect or would be ticked to redo right away with new.
That's just not typical use for most that's all,
T
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