Yo yo yo, my friend is powercoating my kh hub for me but when i had inquired about powder coating kh hubs from darren (bedford) he said it was pricey because he had to put “heat protective silocone” on the splines. Is this needed?
I don’t know alot about how hot it has to be to power coat… but you can get heat proof silicon from most cooking stores
I don’t think its that bad, when I had my hub powdercoated they used what looked like a crapload of masking tape. I think you just need to find a kind of masking tape or alike that has high heat restistant properties. The only problem I had with this method is that getting the tape off was a pain because the glue had gotten really gooy.
So your not quitting?
whats the point of covering the splines? i wouldnt think 500 degrees is enough to change the properties of steel. Plus, the rest of the hub is made of the same stuff so i would think that would need to be covered as well.
The splines would be out of spec with powdercoating on them.
but then he could just get koxx cranks!
Evan, look up normalizing and tempering of steels. Personally, i don’t heat any steel precision machined surface beyond 300 degrees farenheight without protecting the surface, unless finish is irrelevant.
The steel will oxidize (rust) faster than it does at room temperature. I would imagine the protection is to repel the powdercoating and keep the steel from oxidizing. If Darren says it, I would trust him, since he knows plenty about the subject.
He better not because I just bought him a hub…
I know that, i was intending to mask them anyway. I just dont get the whole heat protective silcone thing.
use fiberglass masking tape.
Yeah on mine the surface did oxidize a bit, when it was all said and done the splines seemed a bit more gritty and less polished than when it was new. I havn’t had any problems with it though.