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Deglazing brake discs

Old 07-24-2016, 01:55 PM
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Deglazing brake discs

Has anyone have an opinion (that's a laugh) on using a wire cup (soft) on an angle grinder or bench grinder to de-glaze a disc? I have done it on auto discs with good results.
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Old 07-24-2016, 04:18 PM
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Old 07-24-2016, 05:49 PM
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I use scotch roloc discs in an angle die grinder and rubbing alcohol as a lube/solvent, finish with brake clean and a rag
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Old 07-25-2016, 07:46 AM
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Originally Posted by Fastguy59 View Post
I use scotch roloc discs in an angle die grinder and rubbing alcohol as a lube/solvent, finish with brake clean and a rag
Same here but use brake clean only..
Might want to consider the use of rubbing alcohol,, the flash point is really low depending on what % it is.
very common 90% Isopropyl Alcohol has a flash point of only 54deg F
70% is only 77deg F

and both vaporize making an even more combustible fuel at very low
points.
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Old 07-25-2016, 08:06 AM
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Originally Posted by E.Marquez View Post
Same here but use brake clean only..
Might want to consider the use of rubbing alcohol,, the flash point is really low depending on what % it is.
very common 90% Isopropyl Alcohol has a flash point of only 54deg F
70% is only 77deg F

and both vaporize making an even more combustible fuel at very low
points.
Good point about the flash point something I have never taken into consideration, but i have never had a problem and deglazing takes a light touch. I have an issue with breathing in brake clean vapor, it gives me a cranking head ache, hence the alcohol... When deglazing I put a 1/2" of alcohol in a small tray and dip the role in it every minute or so.
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Old 07-25-2016, 11:44 AM
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Medium grit on the Roloc? The maroon colored?
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Old 07-25-2016, 05:54 PM
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Originally Posted by xeris View Post
Medium grit on the Roloc? The maroon colored?
For me yes the maroon rolocs work fine! Erik what say you?
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Old 07-26-2016, 01:46 PM
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Originally Posted by Fastguy59 View Post
For me yes the maroon rolocs work fine! Erik what say you?
Same here, but if I was out I'd use a fine or coarse as well.. its a light touch on a very hard material.
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Old 07-31-2016, 06:58 AM
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Thanks for the replies.
Because I won't work the tool very hard, longevity is not an issue, and as much as it pains me, I purchased a small angle die grinder from china harbor. Will have at it in a couple of days.
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Old 07-31-2016, 11:43 AM
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I have the roloc system but prefer this if you want to remove all residual brake pad material.

4"x1-1/4" Paint & Rust Stripper Disc - Painting Tools - by Greschlers Hardware
Attached Thumbnails Deglazing brake discs-untitled.png  
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Old 07-31-2016, 04:22 PM
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Originally Posted by smokinjoe73 View Post
I have the roloc system but prefer this if you want to remove all residual brake pad material.

4"x1-1/4" Paint & Rust Stripper Disc - Painting Tools - by Greschlers Hardware
I've used those to strip paint with. Very agressive, on wood anyway.
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Old 07-31-2016, 04:57 PM
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Originally Posted by smokinjoe73 View Post
I have the roloc system but prefer this if you want to remove all residual brake pad material.

4"x1-1/4" Paint & Rust Stripper Disc - Painting Tools - by Greschlers Hardware
Im sure that rust remover disk does what you want it to...all i know is, the 3M rotor conditioning disks do a great job, so i dont see need for me to experiment with other options.
http://3mcollision.com/3m-roloc-brak...pack-1410.html
But if I ever run out of the 3M conditioning disks, I now have a reccomended option I might find locally..
Thanks

Last edited by E.Marquez; 07-31-2016 at 04:59 PM.
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Old 07-31-2016, 06:23 PM
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A side effect/result of deglazing is that it puts a non-directional finish on your rotors which will bed your new pads into the existing disc in half the time... Win, win!
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Old 07-31-2016, 06:31 PM
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The brake pad conditioning disc are designed to used in conjunction with a brake lathe turning at a constant speed while the tech applies one pass to the outside then a slightly overlapping pass to the inside of each side of the rotor. Doing this with the rotor static and moving the grinding medium, makes keeping the disc flat to the rotor very, very hard. I have tons of these discs on my drawer, but changed to the roloc maroon after measuring disc irregularities with the 120 grit disc used with the rotor being static...
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Old 08-01-2016, 06:17 AM
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Originally Posted by Fastguy59 View Post
The brake pad conditioning disc are designed to used in conjunction with a brake lathe turning at a constant speed while the tech applies one pass to the outside then a slightly overlapping pass to the inside of each side of the rotor. Doing this with the rotor static and moving the grinding medium, makes keeping the disc flat to the rotor very, very hard. I have tons of these discs on my drawer, but changed to the roloc maroon after measuring disc irregularities with the 120 grit disc used with the rotor being static...
It never occurred to me, someone would try and use a conditioning disk of anytype on a static rotor,, seeing as the rotor is easily spun at a constant rate with the front end on a lift. Good point.. you dont know what you dont know.
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Old 08-01-2016, 06:32 AM
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Oh, and to finish the job I got one of these.

The ball hone ads a multidirectional etch to the disc. Just like a new one from the factory.
Attached Thumbnails Deglazing brake discs-tech-flex-hone-rotors-144-001.jpg  
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