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Old 02-24-06, 06:55 PM   #1
bigz00
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disk brake question

Hey All

I was wondering if I could machine my rotors. I'm getting a pretty bad scraping sound from my rear rotor and I noticed it was slightly grooved. I'm a machinist so I can easily cut them in a lathe but will they work when I put them back on the bike. Does anyone have any specs for hayes discs? Should I just get new ones? Help please.

Thanks
JZ
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Old 02-24-06, 08:52 PM   #2
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So what kind of machining do you do?

1. mic the thickness of your bike's rotor now.
2. How much of that thickness is going to be left after you machine it?
3. What do you think is going to happen when you heat it up using the brakes?
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Old 02-24-06, 09:10 PM   #3
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They are so thin to begin with, I would be suprised if you could fully remove the grooves and still have a safe rotor. A new rotor can be had pretty cheap.
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Old 02-24-06, 11:11 PM   #4
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I machine parts for medical manufacturers, oil drilling companies, hydraulic system manufacturers, or anyone who has a blueprint and a budget with potential for repeat orders. I can Mic the calipers but I need to know the tolerances. Iím thinking Double Disk Grinding my calipers might be the best idea? Or would buying new be smarter?
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Old 02-24-06, 11:16 PM   #5
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As far as heating them up as I use the brakes. How hot do they get with average XC use?.
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Old 02-25-06, 12:24 AM   #6
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Quote:
Originally Posted by bigz00
I machine parts for medical manufacturers, oil drilling companies, hydraulic system manufacturers, or anyone who has a blueprint and a budget with potential for repeat orders. I can Mic the calipers but I need to know the tolerances. Iím thinking Double Disk Grinding my calipers might be the best idea? Or would buying new be smarter?
I have a Hayes V6 rotor, and it is etched with "1.52mm min thick".

Personally, I'd just buy one instead of machining it. You could get a V6 rotor for about $25. And, you'll be buying piece of mind.
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Old 02-25-06, 12:58 AM   #7
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yeah I will buy some rotors and pads while I'm at my LBS tomorrow.

Thanks All.
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Old 02-25-06, 08:56 AM   #8
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The rotors will get hot enough to give you a second degree burn, I don't know how hot that is tho. If you had one that had some transfer on it you could probably clean it up but, grooves would be to much.
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Old 02-26-06, 02:05 AM   #9
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Thanks everyone. I replaced the rotor and pads today at a cost of 50 bucks. And you are absolutly correct it's worth the piece of mind.
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