Wheel Stud Question

[pappy]

Find yourself a caliper and measure the knurled base. Post the diameter and I'll measure some I believe I have sitting in the garage to compare.

 

[attackchef]

Ok I ll post it tonight, but I want to say 13.9

 

[rsc71]

do these press into the rotors or hubs?

anyone?or is it a dumb question?i just picked up an axle with the rotors off and the studs are in the rotors

 

[mr_manny]

anyone?or is it a dumb question?i just picked up an axle with the rotors off and the studs are in the rotors

rotor is attached/bolted to hub with two bolts.
and
studs are pressed through rotor/hub...

hth,
manny

 

[vk7ybi]

Hmm, the difference between early rotors is that the early ones are bolted with 6 bolts and have 6 holes.. The later ones are bolted with two bolts and retained also with the wheel studs pressed through the both.. These rotors have 8 holes, 6 large on 139.7mm and two smaller ones for the bolts.. Its not the stud that is the problem, its the rotor.. The holes for the bolts are smaller than those for the studs, finding replacement studs to press into the hub isnt going to help the hole size problem in the rotor..

 

[Vicm]

Hmm, the difference between early rotors is that the early ones are bolted with 6 bolts and have 6 holes.. The later ones are bolted with two bolts and retained also with the wheel studs pressed through the both.. These rotors have 8 holes, 6 large on 139.7mm and two smaller ones for the bolts.. Its not the stud that is the problem, its the rotor.. The holes for the bolts are smaller than those for the studs, finding replacement studs to press into the hub isnt going to help the hole size problem in the rotor..

Why is that a problem? , the 2 small holes take 2 bolts the same size ones you use to bolt the spindles to the knuckles.
This is the way they are designed.

 

[rsc71]

thanks Manny,so looking real close at this axle the wheel hubs are different design's.I have 3 axles and a set of knuckles out from a mini and only one wheel hub is different from the rest.any ideas?Sorry for the highjack

 

[vk7ybi]

Why is that a problem? , the 2 small holes take 2 bolts the same size ones you use to bolt the spindles to the knuckles.
This is the way they are designed.

Its not a problem if the rotor matches the hub, but trying to press a wheel stud through a hole only big enough for a bolt the same size as the spindle to knuckle bolt isnt going to happen.. The reason the stud doesnt fit is not because its too big, but because the hole is too small.. The hole is too small for the stud because the rotor is designed to be bolted with smaller bolts, not retained by wheel studs..

Trying to solve this by getting smaller studs wont work, because the studs wont be a press fit into the hub flange, the rotor wont be retained properly..

I learned all this when I did my rear disc conversion, as I used mini rotors.. When I purchased new rotors, I was given the option of the early small hole bolted ones, or the later large hole stud and bolt retained ones..

 

[Vicm]

Its not a problem if the rotor matches the hub, but trying to press a wheel stud through a hole only big enough for a bolt the same size as the spindle to knuckle bolt isnt going to happen.. The reason the stud doesnt fit is not because its too big, but because the hole is too small.. The hole is too small for the stud because the rotor is designed to be bolted with smaller bolts, not retained by wheel studs..

Trying to solve this by getting smaller studs wont work, because the studs wont be a press fit into the hub flange, the rotor wont be retained properly..

I learned all this when I did my rear disc conversion, as I used mini rotors.. When I purchased new rotors, I was given the option of the early small hole bolted ones, or the later large hole stud and bolt retained ones..

What you are saying is right, but he already said he has later rotor (with 8 holes) in post #4
That is the right rotor for the mini hub.
Nice disc conversion you did on those ff rear axles BTW.
Vic

 

[attackchef]

They did work,
after a cracked rotor and one finished rotor later I now know how to do this
you must support the hub in the press not the rotor
and it takes about 10-15 tons of pressure