I have several rear hubs from vintage race MG Midgets that have spun their
bearings, and I need to find a repair. The problem is that this is a single
ball bearing taking all loads, and by the time you put triple the horse
power through far stickier tires through them they last about 300 miles.
The symptom is the outer race gets loose in the bore allowing the hub to
wobble due to the increased loads. The bearings themselves are fine. Hub
is forged steel. This was fine when we had a seemingly endless supply of
rear hubs to throw at the cars, but they are now becoming pretty scarce.
The proper fix is to install a second bearing behind the first, but that
requires a custom machined hub. When you do that there isn't enough room to
put in a seal that actually lasts, so instead of spinning the bearing you
get rear end grease all over your rear brakes.
So what I want to try to do is improve and repair the press-fit between the
bearing and the hub. My first thought is to try to knurl the ID to raise
the surface to get a big press fit. This coupled with Loctite may work.
the second idea is to sleeve the bores. There isn't a lot of room to open
out the bore to take a sleeve, so how thick a wall does the sleeve need?
What material for the sleeve?
Does anyone make an ID knurling tool or should I make one?
18 years ago