I have my cortina hubs with original studs in, but understand they are a bit short for my alloys as there won't be enough thread for the nuts to hold onto. Anyone know what length replacement studs i need to order from raldes?

i'm getting near rolling chassis stage, so would be nice to know so the wheels fitter propper like!

Ned.

I seem to remember someone saying to replace the cortina studs with sierra ones....or was i imagining it?

Cheers
David

Dont forget the more important bit, the taper ! I used the original nuts on my TSW alloys and neary knackered them as the taper in the wheel was different to the one on the nut.
Better off investing in some new nuts to matched the taper in your alloys.

i have the nuts!

i also have some sierra uprights kickng about, so will swap the studs over. nice and cheap!

thanks!

Ned.

Any one know how much thread is needed through the wheel, to do the nut up proper like !!
Thanks
Jason

i *think*that on bolts/nuts you need a full 3 turns (at least) for saftey. not sure though

As a rule of thumb for a standard nut to be 'in safety' the thread of the bolt should protrude 1.5 threads. I know a lot of wheel nuts are closed but if you look at a standard nut that will fit your wheel studs then that will give you a good indication of the thread engagment required, (add a bit to allow for the taper). I would always err on the long side for peace of mind.

SB
I would strongly advise you never to consider three turns to be sufficient.

Mick

[Edited on 15/3/04 by Mix]

[Edited on 15/3/04 by Mix]

quote:

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Originally posted by ned
i have nuts!

i also have some sierra uprights kickng about, so will swap the studs over. nice and cheap!

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Have a look at this recent thread, also about studs and wheel nuts.

http://www.locostbuilders.co.uk/viewthread.php?tid=11343

[Edited on 15/3/04 by wicket]

IIRC the 3 thread thing comes from 3 perfect internal threads engaging on 3 perfect external threads carry something like 90 odd % of the load...the rest beyond 3 add virtually nothing...

I am sure it is theoretically correct, but in the meantime I'll be looking for a lot more threads engaged.

When I was at Rockwell the rule for thread engagement was 1.5 x D into holes that were 2 x D deep...i.e. a 10mm screw to engage 15mm (min) into a 20mm deep (min) hole.....I still follow this rule of thumb

Cheers guys, that clears it up loads, will have to order some new studs then, Bugger
Thanks for the info tho, better to know now than later !!

Jason

parts guy at ford main dealer said hes had kitcar owners in asking for this before, and he said that granada studs would do the job, he was totally correct, i think they were about 75 pence each.
minilight style wheels fitted to mine.

Wicket, just read the post you linked to , sorry, seams like you are doing the same as i intend, RS alloys onto the cortina hubs, I take it you didn't get away with std studs, did you get them from Rally design along with the nuts, I have the nuts, just need the studs ( incase anyone has a spare set that wicket describes )

Jason