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28/29 brake hub

Posted: February 11th, 2018, 10:27 am
by s147881
Has anyone had the rear brake hubs turned. My right one is in great shape but the left rear has a lot of rust and pitting. I disassembled the bearing center from the hub but not sure how or who turns these. Any advice or direction would be greatly appreciated. Also - If someone has an extra brake hub (left) that they would like to sell - I would be interested. Thanks

Re: 28/29 brake hub

Posted: February 11th, 2018, 11:23 am
by Bob C
Are you looking for a hub or brake drum??

Bob

Re: 28/29 brake hub

Posted: February 11th, 2018, 2:34 pm
by s147881
Brake drum.

Re: 28/29 brake hub

Posted: February 11th, 2018, 3:52 pm
by flatford39
These are steel drums right??? I don't think you turn them like you can the cast iron drums. There isn't enough meat in them to cut out.

Re: 28/29 brake hub

Posted: February 11th, 2018, 5:06 pm
by KimVanOrder
Has anyone or could someone install a 'sleeve' to restore one?

Re: 28/29 brake hub

Posted: February 11th, 2018, 11:13 pm
by Chris Haynes
Perhaps metal spray on more metal then turn back to stock?

Re: 28/29 brake hub

Posted: February 12th, 2018, 4:02 pm
by KimVanOrder
Chris Haynes wrote:
February 11th, 2018, 11:13 pm
Perhaps metal spray on more metal then turn back to stock?
I wouldn't trust spray on metal. In may past life I have seen it delaminate. Press in and weld a .100" thick sleeve and turn to true it up. That is what I would do. (and keep an eye open for another one)..

Re: 28/29 brake hub

Posted: February 12th, 2018, 4:50 pm
by s147881
Took drum to my machinist and I believe it is to thin to turn. Heavily pitted and would need to turn down to .130 to clean up. Also he estimated 2-4 hours machining time with setup - 120.00 to 240.00 dollars. I told him I would look for better hub.

Re: 28/29 brake hub

Posted: February 12th, 2018, 8:17 pm
by tiredtruckrestorer
Cast drums can be cut on a lathe, but steel drums like most original A and AA used were pressed steel. To true up a pressed steel drum they should be ground on a drum grinding machine. The machinist was right, it can take around four hours to do one. I found an old truck brake drum grinding machine and set it up to grind the larger AA drums. If they are pitted bad there is not much material there to grind out pits though. I found that usually the 30-31 front drums are usually better candidates to regrind for the rear. I realize you can't do that with the 28-29 front drums as they are smaller than the rears. There were a couple of different depths to the rear drums too, depending on whether the truck had e-brakes or not, or they were used on the bevel gear rears.

It makes a difference when the the drums are trued, woven lining used and arced to fit the trued drums.

Keith