Axle hell

[64Chevelle]

Hi,

I've made myself a problem... I wanted to fit C5 wheels on my 10 bolt 2nd gen Camaro rear axle. I need spacers to mount them easily and for convenience I wanted to order standard C5 adapters since I also have the AFX spindle up front. I'm also converting to 2002 Camaro/LS1 brakes on the rear. The stock axle hub is 70.5 (measured 70.6) mm so I decided to machinde the axle hub down to the C5 70.3 mm.

What I didn't think about is that the brake rotors should be centered on the hub but now the are not perfectly centered anymore. I should only have machined off the outher half of the hub...

Is there anything I can do to regain the hubcentricity of the brake rotors still allowing the use of the C5 adapters?

My other option is to buy new stock axles and order custom built adapters instead. The C5 adapters are readily available and are cheaper then the custom made ones...

[64Chevelle]

I've been somewhat successful with wrapping the inner half of the hub with some electric insulation tape, it provides just about the 0.15mm for a total of 0.3 mm.

It's not a long term solution though.

Any experience with hub rings?

[megaladon6]

i run hub rings on my vw's summer rims with zero issues and i haven't seen any issues from them.
question, don't the lugs go through the rotor? that should hold it in place enough. i don't think the rotor has to be perfectly centered.

[Apogee]

I would probably just machine the register further so that it is substantially (at least .100") undersized and then press fit a sleeve over it and remachine it the way you now know you should have to begin with. Any sort of loose spacer for the current dimensions is going to be so thin that machining it and maintaining any kind of roundness and/or wall thickness tolerance will be a chore IMHO. You may be able to machine it to a "standard" size and then use an off-the-shelf hubcentric ring as well.

Depending on the axles, I've also seen a few that were machined to accept bolt-on axle registers. The axles were center tapped for custom machined billet aluminum registers and then retained with a single fastener in the center...I believe it was so that they could easily swap between two different wheel patterns with different wheel registers. Those combined with screw-in studs seemed to work slick.

Considering how hard most of us work to balance our wheels and tires, the closer your rotor is to running true to center the better.

Tobin
KORE3

[paul67]

You can get plastic 1 s check some wheel suppliers.

[Twentyover]

You can get plastic 1 s check some wheel suppliers.

Ummmm....

If he's using this to register a rotor, which can get pretty hot, I'm not sure plastic is the best choice of material

[64Chevelle]

I would probably just machine the register further so that it is substantially (at least .100") undersized and then press fit a sleeve over it and remachine it the way you now know you should have to begin with. Any sort of loose spacer for the current dimensions is going to be so thin that machining it and maintaining any kind of roundness and/or wall thickness tolerance will be a chore IMHO. You may be able to machine it to a "standard" size and then use an off-the-shelf hubcentric ring as well.

That idea struck me as probably the best solution. I've got a hold of some thin flat shims that I'll cut and bend in fitting pieces to temporarily center the brake rotor.

Depending on the axles, I've also seen a few that were machined to accept bolt-on axle registers. The axles were center tapped for custom machined billet aluminum registers and then retained with a single fastener in the center...I believe it was so that they could easily swap between two different wheel patterns with different wheel registers. Those combined with screw-in studs seemed to work slick.

That would be awesome

Considering how hard most of us work to balance our wheels and tires, the closer your rotor is to running true to center the better.

Agreed, I believe the high weight of the rotor also makes small imbalances quite noticeable.

[64Chevelle]

Ummmm....

If he's using this to register a rotor, which can get pretty hot, I'm not sure plastic is the best choice of material

In my second post I've linked to some plastic hubrings, although their purpose is to register the wheel they are still close to the brake rotor and should be pretty much affected by the same heat. They are probably made from some special kind of plastic. I've also heard that the plastic hubrings are not recommended compared to their aluminum counterparts.