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preparing for powder coating

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Ewan 500 K1:
Hi,

Just getting the frame ready for powder coating. Does anyone know if I need to remove the bronze bushes from inside the swing arm pivot tube ? They are in fine condition and I'd rather not have to buy new ones if I dont need to. Same with the taper roller bearings in the steering stem, do I need to take the bearing seats out ?   Last, I guess that the rear shock bushings on the swing arm will definetey need removed as they are part rubber ? I'd be interested in any other hints and tips for prepping for powder coating anyone has too

cheers

Piki:
Take off all rubber parts!!!

Ewan 500 K1:

--- Quote from: Oddjob on August 21, 2013, 03:30:06 AM ---A lot depends on whether the frame will be shot blasted or bead blasted. If bead then you can leave some stuff in but if shot remove everything.

Clean the frame, I mean really clean it, no grease etc otherwise if the powder coater isn't meticulous then you'll end up with areas or bead/shot which then get coated over and eventually the powder falls off as it has no adhesion.

Either fit old bolts into threaded holes or buy a good set of taps/dies to clean them up afterward.

Best powder coater I know is Index Triple S in Halifax, highly recommended especially for frames.

--- End quote ---

Cheers oddjob. I'll be using Triple S , seen so many good things said about them. They've moved to Bingley now. I managed to get the stubborn rear shock bushes off the swinging arm this morning , although the vice handle got bent in the prpcess ;) . Will stick some phots on my build thread later tonight. I've also degreased the sterring stem tube and swing arm tube and every other hole that I could fit a toothbrush/rag into. I'm still not keen on removing the bronze swing arm bushes and steering race tapered roller seats as I dont want the expense of getting new ones.... getting to close to the daughters weddin.... do I really need to remove them, what do you reckon ?

Ewan 500 K1:
Spoke to Andy at Triple S Powdercoaters ( http://www.triple-s.co.uk ). Andy says:

a) Leaving the bronze bushes in the swinging arm pivot tube should be fine
b) Leaving the seats for the needle bearings may be iffy because if there is any grease left behind the bearing seat it will melt when the part goes through the oven and spoil the job.
c) Triple S will blank off all holes and threads before applying the powder coat.

So ..... anyone know how to get the flipping needle bearing seats out of the headstock tube without damaging them ?

Bryanj:
Problem with taper races is that there is no surface to tap on to get them out, only way i know of removal ie either a run of weld arround the race to shrink the or a dremel to cut them--both of which destry them.

The only possible way i can think of to protect them is to turn some hardwood or dense nylon cones to fit and hold them tight in with a length of stud bar through a hole in the middle of both, ask the powder coater what he thinks.--Possibly even steel cones

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