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Author Topic: powdercoating brake discs  (Read 1871 times)

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Offline mazingerzeca

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powdercoating brake discs
« on: January 05, 2013, 06:33:39 AM »
Hello all.
I would like to paint the inner part of my brake discs (CB750). Given that I am going to bring some parts to the powdercoater, I wonder if I could include the brake discs, but I'm afraid that they could distorto due to the powdercoating oven temperature. Is the temperature safe for these discs? Thank you.
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Offline purf_man

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Re: powdercoating brake discs
« Reply #1 on: January 05, 2013, 06:40:54 AM »
totally safe.

I just had mine done (getting them next week)
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Offline MCRider

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Re: powdercoating brake discs
« Reply #2 on: January 05, 2013, 06:46:21 AM »
Quote from: purf_man on January 05, 2013, 06:40:54 AM
totally safe.

I just had mine done (getting them next week)
Me too.
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Offline mazingerzeca

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Re: powdercoating brake discs
« Reply #3 on: January 05, 2013, 06:51:13 AM »
Thanks for the replies. I will powdercoat them.
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Offline MCRider

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Re: powdercoating brake discs
« Reply #4 on: January 05, 2013, 07:11:56 AM »
Quote from: mazingerzeca on January 05, 2013, 06:51:13 AM
Thanks for the replies. I will powdercoat them.
When my guy masked off the braking surface, he left the circumferential edge. It got coated for a nice effect.

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1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline RSchaefer

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Re: powdercoating brake discs
« Reply #5 on: January 05, 2013, 07:31:27 AM »
I had been considering this!  Looks like from the one picture you went ahead and coated the pin/bolt heads around the inner ring as opposed to masking them off as well.  I was looking at the stock look and the masking effort would be substantial unless you forgot about the bolt heads.

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Offline MCRider

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Re: powdercoating brake discs
« Reply #6 on: January 05, 2013, 08:01:48 AM »
Hmm, it never even occurred to me. The powdercoater did it that way and I didn't offer an opinion.
I think he taped it, then ran a razor blade around the easiest border.
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1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Harsh

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Re: powdercoating brake discs
« Reply #7 on: January 06, 2013, 05:18:41 PM »
Quote from: MCRider on January 05, 2013, 08:01:48 AM
Hmm, it never even occurred to me. The powdercoater did it that way and I didn't offer an opinion.
I think he taped it, then ran a razor blade around the easiest border.

That is how I did mine.

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Offline SOHC4 Cafe Racer Fan

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Re: powdercoating brake discs
« Reply #8 on: January 06, 2013, 06:09:00 PM »
Quote from: MCRider on January 05, 2013, 07:11:56 AM
Quote from: mazingerzeca on January 05, 2013, 06:51:13 AM
Thanks for the replies. I will powdercoat them.
When my guy masked off the braking surface, he left the circumferential edge. It got coated for a nice effect.



That's some crazy drilling, MC.  I really like the coating on the edges.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
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"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
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Offline Thousandson

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Re: powdercoating brake discs
« Reply #9 on: January 06, 2013, 06:28:14 PM »
Tip from another pro. (not this guy, just useful information) Because of the inconsistency, of powder coat. If the inside of the disk rim (look below) is powder coated. When its bolted to the wheel, it might not be parallel with the wheel. One guy was telling me that when he was test driving it, when braking it would be inconsistent, it would shutter to a stop, not wile riding, just braking. Took the wheel off left the disks on, and brought it to his balancing station, spun the wheel and the disk wobbled. Not because of improper balance, or lose bolts but because of powder added thickness in between the rear of the disk and the hub. ".003" of and inch of powder  coat thickness transferred to .03 or so of wobble on the outer disk edge.
Keep riding, it looks good, just wanted to share my knowledge.

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Offline RSchaefer

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Re: powdercoating brake discs
« Reply #10 on: January 06, 2013, 06:37:38 PM »
Quote from: Thousandson on January 06, 2013, 06:28:14 PM
Tip from another pro. (not this guy, just useful information) Because of the inconsistency, of powder coat. If the inside of the disk rim (look below) is powder coated. When its bolted to the wheel, it might not be parallel with the wheel. One guy was telling me that when he was test driving it, when braking it would be inconsistent, it would shutter to a stop, not wile riding, just braking. Took the wheel off left the disks on, and brought it to his balancing station, spun the wheel and the disk wobbled. Not because of improper balance, or lose bolts but because of powder added thickness in between the rear of the disk and the hub. ".003" of and inch of powder  coat thickness transferred to .03 or so of wobble on the outer disk edge.
Keep riding, it looks good, just wanted to share my knowledge.


Very good point I think!!
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'72 CL 175, (Project Bike)
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'87 GL1200 Wineberry Aspencade
'83 GL1100 Wineberry Aspencade
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'75 GL1000 Turquoise
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Offline scottly

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Re: powdercoating brake discs
« Reply #11 on: January 06, 2013, 06:45:44 PM »
Also, don't powder-coat the inside of the center hole, as it may not allow the disc to fit on the wheel hub.
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Offline SOHC4 Cafe Racer Fan

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Re: powdercoating brake discs
« Reply #12 on: January 06, 2013, 07:03:17 PM »
All good points!   ;D
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: powdercoating brake discs
« Reply #13 on: January 07, 2013, 12:57:19 AM »
Had mine done too. He even coated the outside edge!
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Offline lucky

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Re: powdercoating brake discs
« Reply #14 on: January 07, 2013, 06:37:40 AM »
Quote from: Jerry Rxman Griffin on January 07, 2013, 12:57:19 AM
Had mine done too. He even coated the outside edge!

Do you mean the part the brake pad is in contact with??
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Offline lucky

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Re: powdercoating brake discs
« Reply #15 on: January 07, 2013, 06:38:00 AM »
Quote from: Jerry Rxman Griffin on January 07, 2013, 12:57:19 AM
Had mine done too. He even coated the outside edge!

Do you mean the part the brake pad is in contact with??
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Offline RSchaefer

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Re: powdercoating brake discs
« Reply #16 on: January 07, 2013, 06:42:07 AM »
No I think he means the outside perimeter edge as in the original MCRider picture
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'66 CB77, 305 Superhawk (Project Bike)
'72 CL 175, (Project Bike)
'75 CB750F (Project Bike, Complete)
'05 GL1800 ABS Black Cherry (Current Ride)
'87 GL1200 Wineberry Aspencade
'83 GL1100 Wineberry Aspencade
'76 GL1000 LTD
'75 GL1000 Turquoise
'69 Honda 750cc Gold
'67 Honda 305 Dream Black
'63 Honda S90 Black
'61 Honda 50 Red
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: powdercoating brake discs
« Reply #17 on: January 07, 2013, 01:16:14 PM »
Quote from: lucky on January 07, 2013, 06:38:00 AM
Quote from: Jerry Rxman Griffin on January 07, 2013, 12:57:19 AM
Had mine done too. He even coated the outside edge!

Do you mean the part the brake pad is in contact with??

Geez Lucky no one is THAT bad  ;) Rich is correct, the 'edge' not the surface. Guess he thought that'd be cool looking? 
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)
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