Author Topic: HELP! My Steering bearing seat got powder coated! what can I do now?  (Read 2578 times)

0 Members and 1 Guest are viewing this topic.

Offline Will

  • Full Member
  • *
  • Posts: 17
So I brought my '77 CB550F frame down to a guy that does blasting and coating in my neighborhood. I picked up the frame, and when I got it back to the shop to start rebuilding, I noticed that he had meticulously plugged all of the right holes, and masked everything that needed to be masked.... EXCEPT! he forgot to plug the head tube!!! Now I have a completely cured powder coat on both top and bottom steering bearing seats! 
What can I do to get the powder coating out of the bearing seats??? I am afraid to sand, or blast, because the seat tolerance will be f'd up.
Do i need to find a machinist to bore the bearing seat back out?
is there a chemical solution to strip a powder coat?
Has anyone ever had to deal with this before?
What a pain in the ass...

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,810
Re: HELP! My Steering bearing seat got powder coated! what can I do now?
« Reply #1 on: December 11, 2009, 05:53:07 PM »
Wrap and tape the outside surfaces.  Heat the races to melt the paint.  Got a glue gun....soldering iron........wood-burner tool? Be careful to keep the outer paint cool.
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline mcuozzo

  • Hot Shot
  • ***
  • Posts: 311
  • Bottle in front of me or frontal labotomy?
    • 77 CB750K - needs total rebuild
Re: HELP! My Steering bearing seat got powder coated! what can I do now?
« Reply #2 on: December 11, 2009, 07:37:06 PM »
I think the heat my damage other surronding powdercoating.  Especially if the powdercoat used is glossy or has a clearcoat.

There are chemicals available to strip powdercoating.  I would be surprised if your local coater didn't have some.  See if he'll give you some.  Just be careful to get it only on the pc that you want to remove.

If he doesn't have it you can get it at a number of places...

http://www.columbiacoatings.com/category_s/8.htm
http://www.eastwood.com/hotcoat-powder-coating/prep-stripping/ew-powdercoat-and-paint-dissolver-quart.html


Offline Will

  • Full Member
  • *
  • Posts: 17
Re: HELP! My Steering bearing seat got powder coated! what can I do now?
« Reply #3 on: December 12, 2009, 05:50:45 AM »
thanks guys, I appreciate your help.

Offline MCRider

  • Such is the life of a
  • Really Old Timer ...
  • *******
  • Posts: 14,376
  • Today's Lesson: One good turn deserves another.
Re: HELP! My Steering bearing seat got powder coated! what can I do now?
« Reply #4 on: December 12, 2009, 09:29:04 AM »
thanks guys, I appreciate your help.
I had the similar problem they coated the swingarm bosses, so the SA wouldn't slide into palce.

I used a sanding drum on a dremel. Carfefully took the powder off until I saw the metal and stopped. PC is tough but its not that tough.

I asked the powder coater and he said that should be fine. All of the coat is bonded to the metal so opening up a wound makes no difference.
« Last Edit: December 12, 2009, 09:31:06 AM by MCRider »
Ride Safe:
Ron
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."