Permitted Rear Hub twist

[Peter Truman]

As advised elsewhere I'm building up two spare Spitfire rear axle assemblies from diff to rear hub/wheel, I've had the axles annealed/teat treated to remove any directional memory to avoid torsional failure, I'm about to fit the outer rear hubs with new wheel studs to the assembled axle's, new UJ's, rear inner hub (new good quality bearings), 

Being worried about buckled rear hubs I've just had the hub faces checked, one is 0.008 of a mm out on the outer face, which we considered acceptable, the other 0.017 of a mm out, the latter we propose to skim so it's flat. a third one I had was 0.045 of a mm out a definite case of a 3 arm bearing puller being used, that too will be skimmed!

What is the acceptable twist in the outer face of the rear hub, I've followed a supposed Concour quality Spit in the past where the wheel wobble of the wheel looked horrible, that in fact was a buckled wheel, new Minilite replica's fixed that. 

I would appreciate any members knowledge on what's acceptable?

Thanks

PeterT  

[Pete Lewis]

to me  its the sort of face that would have a std  0.005"  runout  tolerance 

same for any coupling flange 

Pete

[johny]

If you can get the brake shoes adjusted nicely to the drum ie minimal intermittent rubbing (can be drum out of round as well so try both) then I think thats got to be a pretty good indicator of the condition of the set up....

[ahebron]

Peter T more info on heat treating/annealing the axles please.
I have a pile of axles in my shed that have been removed from hubs so  no idea what side they are from.

Thanks
Adrian

[Pete Lewis]

it involves heating to some temperature and cooling slowly  

well worth doing on any unknown shaft as many that shear have been fitted to a reversed side 

and the unwind creates a crack which propergates to a nice smooth failure but not for the driver or the car 

Pete

[johny]

Id imagine its got to be done properly as uniform and not too soft - certainly dont want to lose hardness where the needle rollers run....

[Peter Truman]

When discussing with the spring maker restorer we discussed not affecting the hardened bearing area I seem to remember he said heated to around 350/400 so it didn’t affect the hardening.

A jag E type ownerI know has used him eons ago to recon the front torsion suspension to neutralise any torsional memory no problems to date

He had a beautiful little red Honda S800 Coupe in restoring all the suspension, very interesting looking at the drive line and chain drives

Edited October 24 by Peter Truman

[ahebron]

Damn, thats just over stick it in the home oven range of temps.
Assuming you mean celcius.

[Peter Truman]

Yep were metric here!! He was aiming for the 350C. Moorabbin Spring Resto

Edited October 25 by Peter Truman