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+--- Thread: Wheel studs CAUTION (/showthread.php?tid=1751)
Wheel studs CAUTION - Dennis Nicholas - 18-09-2018
While re-assembling my rear hub I was just putting the nuts on the wheel studs to hold the hub tool on that allows you to hold the hub while tightening the half shaft nut. I used moderate pressure with the spanner just to ensure the tool was reasonably tight on the hub. Two tightened ok but the third (as always the last one!) became easy to turn....the stud pulled out of the round plate that is riveted to the rear hub half.
The new stud bought looks to be far better in that it appears to be STUD/PLATE machined out of one solid billet rather than plate with seperate stud welded in.
So CHECK YOUR WHEEL STUDS FOR BEING FIXED TO THE RIVETED PLATE.
Rude words were said while I quickly removed hub before bearing locktite could set, on shaft taper and around bearing in hub....
So how do you rivet on the new one? An anvil (5mm round) held in vice to rest the rivet head on; one hand holding hub; second hand holding drift against end of rivet; THIRD hand holding hammer to strike drift
Note that the other half can't be involved in any holding anything steady as this has led to "heated discussions" in the past!Dennis
RE: Wheel studs CAUTION - bob46320 - 18-09-2018
I think I would replace all studs on all 4 hubs. The new ones I have bought were turned from the solid. The ones you show look like they were originally threaded onto their bosses.
RE: Wheel studs CAUTION - Ian Williams - 18-09-2018
Very common but not well publicised Dennis, so good on you for bringing it to the forums attention, I always check the back of the studs and replace at the first sign of any dishing.
RE: Wheel studs CAUTION - Hedd_Jones - 18-09-2018
I had two on one wheel part company on a run in the midlands some years ago. The result was a ride from the RAC. The wheel stayed on however
RE: Wheel studs CAUTION - Robert Foreman - 18-09-2018
The cause is due to to no radius in the corner New ones are fine. You may need to increase the countersink in the hub though Any radius will give strength, the bigger the radius the better.
RE: Wheel studs CAUTION - Dennis Nicholas - 19-09-2018
(18-09-2018, 10:37 PM)Robert Foreman Wrote: The cause is due to to no radius in the corner New ones are fine. You may need to increase the countersink in the hub though Any radius will give strength, the bigger the radius the better.
Sorry not understood. Please would you explain a bit more...........what "corner".
By "countersink in the hub" do you mean the countersink that the end of the rivet is knocked into?
Dennis
RE: Wheel studs CAUTION - mk1-mark - 19-09-2018
The radius is at the base of the wheel stud where it joins the back plate. A large radius here reduces the chance of failure. A sharp angle increases it.
The backplate may have to be countersunk to accommodate the larger fillet radius.
![[Image: studs.jpg]](Http://mk1-performance-conversions.co.uk/web/studs.jpg)
RE: Wheel studs CAUTION - Dennis Nicholas - 19-09-2018
Thank you mk1-Mark.
Just checked and my new studs from a7c have that radius. There also exists the countersink chamfer on the backplate.
Have just applied Wurths rust kill/prevention to bare metal and given a quick squirt of etch primer to stud and stud area on backplate....will re-apply topcoat when stud fixed in place.
Dennis
RE: Wheel studs CAUTION - Bob Culver - 19-09-2018
Many acid based rust treatments should be kept from ht steel such as spokes, studs, springs as promote failure.
In my youth my car was regularly much abused; inside rear wheel lifted on switchback corners etc. Nearly every hub I had seen had slightly dished studs so I fitted an extra 3 to each wheel. My experience at the time were limited and the locations not exact so had to use flat nuts. Car is still so disfigured.
RE: Wheel studs CAUTION - Colin Reed - 19-09-2018
Hi Dennis,
the previous replys are correct regarding having a radius on a one piece stud as that is the weakest point , But the reason your two piece failed is what ever means the Factory used to fix the stud and flange together failed and allowed the stud to pull through the flange nothing do with a radius .
Colin
NZ