Anybody Ever Had A Brake Disc Skimmed?
Posted 17 May 2012 - 01:52 PM
for the sake of < 15 qwid im going to pop some new pads in.
after looing at my disc there are a couple of score marks on it so i have been thinking of getting it skimmed?
a new disc is more than i want to spend at the moment, and an engineers will only charge a tenner if that to skim it smooth and check it for flat.
just wondering is there tolerance on bike discs like the car equivalent?
anybody done the same?
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Posted 17 May 2012 - 02:53 PM
Posted 17 May 2012 - 05:28 PM
Posted 17 May 2012 - 08:42 PM
the minimum thickness of the disc i have fitted is 2.7mm (etched onto disc), and to be honest, ive measured it on removal tonight and it is just above the minimum at 2.74mm at its thinnest. but im going to do it anyway as i only want the (very shallow) scores taken out, and to be checked for flat.
im going to leave the disc in the capable hands of a friend who has a Pro-Cut lathe, and keep my finger crossed his equipment is able to do it.
Posted 17 May 2012 - 08:48 PM
Posted 17 May 2012 - 09:01 PM
ill ask my mate tomorrow if he thinks he can do it.
it wont hurt to ask the question, and even if he buggers it up i dont mind as i need a new disc anyway
Posted 17 May 2012 - 10:16 PM
The brake squeak is not due to the state of the disc surface but rather it is the relationship of the back part of the pad vibrating against the brake puck causing vibrations and squeaking. Pretty common and there is a product that one can get at a auto parts store for that very purpose.
Check the back of the brake and you should see a nice round wear circle that is witness to how well the round puck and brake pad are wearing together a broken circle mark tells a story.
Edited by BillyT, 17 May 2012 - 11:12 PM.
Posted 18 May 2012 - 01:31 AM
Nissan motor Co. (cars) parts departments sell a gold colored paste(PBC grease , I think is the name ,there's a bottle on my toolbox at work.!.!.) for application to all of the metal to metal contact points on disk brake pads , Similar to the lube you got years ago when you purchased factory toyota pads . Apply just a wee bit to the contact points on the back of the pad and where the ends of the pad slide in the bracket and your noise will go away . The squeek you hear is a harmonic vibration between the pad and its mounting points and the caliper , amplified by the rotor . the lube dampens the vibration and the noise won't be heard . And it also allows for better heat transfer so your brakes last longer and work better . Scuff your rotors with a coarse scotchbrite pad and brake cleaner , then install the new pads . I personally wouldn't even think of resurfacing a rotor on any motorcycle ... They wear out fast enough on their own ... (IMHO) And be sure not to get any of the lube on the friction surfaces !!!
Edited by axulsuv, 18 May 2012 - 11:53 AM.
And you never see a motorcycle parked in front of a psychologists office ...
"Traction is where you find it "
"To acheive anything in this game you must be prepared to dabble in the boundry of disaster" (Stirling Moss)
Posted 18 May 2012 - 05:49 AM
I got so much chattering it just went in the bin. Buy a new one if you can't grind it!
Posted 18 May 2012 - 11:22 AM
Grinding will quite possibly result in distortion.
Follow the advice others have given on getting rid of squeal - copperslip of blue hylomar btwen piston and pad work.
Nothing is foolproof to a sufficiently talented fool
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Posted 18 May 2012 - 04:26 PM
Next you want a smear of coppa slip grease on the bach of the pad (make sure your greasy fingers do not touch the pad material).
Re fit the pads and grease the main pin/bolt lightly with coppaslip before you pop it in.
You will have no more squeaking.
Posted 18 May 2012 - 04:56 PM
the pads got plenty of material on them, but the rear backing plate is bubbled up with corrosion, and the scoring of the disc has worn them unevenly and grooved them.
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