Board logo

finishing hub faces
loggyboy - 15/8/13 at 10:47 PM

Im looking at powdercoating my rear hubs this week and was wondering if it would be best to leave the face the disc mounts to unfinished.

[Edited on 15-8-13 by loggyboy]

chrism - 15/8/13 at 11:59 PM

I would say yes, as even a small variance on the flatness of the hub face gets exagerated further out on the wheel, and would mean your wheel would not be spinning true.

britishtrident - 16/8/13 at 06:41 AM

Avoid a thick coating on either the hub to disc face or the hub to wheel face.
Avoid anything that gets in the way of heat transfer the wheels act as as heat sink for the brakes.

adithorp - 16/8/13 at 10:36 AM

Yes, leave them uncoated.

99% of "warped discs" are actually just crap between the disc and hub face. Just the slightest amount of Rust, grit, grease or I guess even paint cause it not to seat evenly enough.

loggyboy - 16/8/13 at 11:14 AM

Cheers all.
Nicely finished rear and copper slip to the bare metal it is then!

adithorp - 16/8/13 at 12:19 PM

quote:
Originally posted by loggyboy
Cheers all.
Nicely finished rear and copper slip to the bare metal it is then!


Officially they should be dry (no grease). We've never had any issues with just the slightest smear of copper-slip. No more than a smear though.

loggyboy - 16/8/13 at 12:29 PM

Why technically none? What the disadvantage?

adithorp - 16/8/13 at 12:33 PM

The heat from the brakes could/will melt it will be spun out and potentially get onto the braking surface. If it's applied unevenly then the disc doesn't sit flat/flush and you get vibration on the brakes (sounds unlikely but I've seen it happen).

britishtrident - 16/8/13 at 12:42 PM

And is better not to use Coppaslip between the hub and wheel as it doesn't really stop the wheel seizing on, the best stuff to use is aluminum-graphite anti-seize compound sometimes sold as Aerial Assembly Paste.

Various brands available but I have a big tin of Delta 515 which I bought after reading a LandRover service Bulletin on stuck on alloy wheels, it works a treat I have never had any alloy wheels stuck on after using it.