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Re: Brake drums powdercoat inside. Problem?
[Re: Howley]
#747722
09/03/18 10:25 am
09/03/18 10:25 am
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Joined: Aug 2015
Posts: 1,329 Bolton Lancs UK
Andy Higham
BritBike Forum member
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BritBike Forum member
Joined: Aug 2015
Posts: 1,329
Bolton Lancs UK
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Send your brake drum, brake plate and shoes to a brake specialist. They will fit oversize linings to your shoes, skim the drum and machine the linings to suit. Result = a better brake
BSA B31 500 "Stargazer" Greeves 200 "Blue Meanie" Greeves 350 Greeves 360 Suzuki GSX1100 EFE "Sorcerers Apprentice" GM500 sprint/LSR bike "Deofol" Jawa 500 "Llareggub" Aprilia RSV Mille "Lo Stregone" '35 & '36 OK Supreme Kawasaki ZZR1400 "Kuro no senshi"
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Re: Brake drums powdercoat inside. Problem?
[Re: Howley]
#747832
09/04/18 12:14 am
09/04/18 12:14 am
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Joined: Aug 2001
Posts: 4,650 Owego, NY, USA
Mark Z
BritBike Forum member
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BritBike Forum member
Joined: Aug 2001
Posts: 4,650
Owego, NY, USA
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Hi all,
I just got parts back from the powdercoaters and they've coated the braking surface of the brake drums. Is that going to cause a problem? I feel like it will.
Thoughts? It will absolutely cause a problem - besides creating an uneven radius, it will melt onto/into your brake linings. We see this problem at work with the wheels we get for our electric mobility scooters. They come from China so there's no sending them back, we just have to get the powder coating out of there however we can. If it's thin it can be sanded out, but if it's thick sometimes we have to resort to a hammer and chisel. BTW, for sanding, one of those "sanding screens" seems to work best.
Mark Z
'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
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Re: Brake drums powdercoat inside. Problem?
[Re: Howley]
#747883
09/04/18 1:43 pm
09/04/18 1:43 pm
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Joined: Dec 2012
Posts: 308 seattle
tiumphdave
BritBike Forum member
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BritBike Forum member
Joined: Dec 2012
Posts: 308
seattle
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I use paint stripper- the type that's labeled "aircraft quality".applied with an acid brush. It takes several applications because I use a thin coat to avoid slopping it around. It continues to cure for several days, so the sooner the better. Once softened all the way through it can be sanded easily to finish up. You just have to be careful to avoid getting it on surrounding areas, but if you do, it works slow enough to wipe off before damage is done. I had a Triumph rear hub done once, and had to clear the spoke holes with a drill bit. I now paint the hubs, along with the oil tank. It's expensive to have the front done in silver-gray, So I paint that as well. I sand some off (but not all) on bolted together flanges, and clear some holes with drill bit or tap as needed.Where they mask the top threads on the sliders sometimes a little bare metal doesn't cover up when assembled- I touch that up with several coats of a black permanent marker so it doesn't rust. Works well. Electrical grounding points need cleaned as well. I also take pictures of parts that show areas to be masked, and a pic of all small parts laid out- this helps prevent missing parts. At first I had them use the most glossy black ( they call it "wet-black"), but now I have them tone down the gloss a little, and it comes out much nicer. The biggest problem is orange peel- mostly side covers and headlight ears. I inspect when I pick it up and have them re-do anything I don't like. They use stripper when respraying, that's where I learned about it.
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Re: Brake drums powdercoat inside. Problem?
[Re: Howley]
#747907
09/04/18 6:44 pm
09/04/18 6:44 pm
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Joined: Aug 2001
Posts: 1,898 Elko, Nevada USA
dave - NV

BritBike Forum member
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BritBike Forum member
Joined: Aug 2001
Posts: 1,898
Elko, Nevada USA
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Gents … You didn't ask, but I'll share this with you. Some years ago when I was restoring a Goldie, I had spray painted a 190mm rake drum with the correct(?) silver automotive paint. After a few years of umm spirted riding, the drum became, ugly rusting down in the fins and the paint beginning to curl up. So for the last 190 brake I built up I sourced silver high temp 'caliper' paint from Eastwood and brushed it on paying attention to paint it down into the fins. To 'properly' build up this brake I also had the drum skimmed and the shoes of the Phil Pearson TLS backing plate turned to fit. Works nicely for a good 'whoa up' from speed. This paint flowed nicely and works great. It worked so well I unspoked the earlier brake, stripped it and repainted it too. On n on we go, sheeze.
I've also used the locally available black caliper paint to brush on rear brake drums.
Last edited by dave - NV; 09/04/18 7:01 pm.
Dave - NV
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Re: Brake drums powdercoat inside. Problem?
[Re: Howley]
#747926
09/04/18 9:50 pm
09/04/18 9:50 pm
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Joined: Aug 2001
Posts: 2,713 Springfield Nebraska
Richrd
BritBike Forum member
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BritBike Forum member
Joined: Aug 2001
Posts: 2,713
Springfield Nebraska
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where do you find these powdercoaters?
the two shops I've used mask off ALL areas that should not be coated. Brakes, bearing recesses, etc.
Rich (member ThreeMustGetBeers) "It's not always about going fast. Sometimes it's nice to slow down" (Wendy E.2016)
69 bonney 72 commando 75 commando interstate 06 Suzu..Suzu.. uh appliance couple of beesas a ducati and the Snake Bike and a Honda?
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Re: Brake drums powdercoat inside. Problem?
[Re: Howley]
#748078
09/06/18 3:47 am
09/06/18 3:47 am
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Joined: Jan 2006
Posts: 3,357 Medford, Oregon
Gary E
BritBike Forum member
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BritBike Forum member
Joined: Jan 2006
Posts: 3,357
Medford, Oregon
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Yes, concur with Richrd. The powder coater use, knows what their doing. They mask off all of the proper areas on frames and cycle parts. Once in a while I point out an area I want masked off.
1967 BSA Wasp 1967 BSA Hornet (West Coast Model) 1967 BSA Hornet (East Coast Model) 1968 BSA Firebird Scrambler 1968 BSA Spitfire Mark IV
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