Using mustang rotors for 4.5" bc

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ppsi said:
View attachment 1715498370

View attachment 1715498371 View attachment 1715498373 I'd like see if there's an interest in creating the definitive guide to using the mustang rotors as a swap for the KH rotors.
My lathe is a little too small to swing the 11.210" mustang rotors so I set it up in my mill on a rotary table.. I'll do the machining of the bearing/seal areas but will have to bring them to get the OD cut down. I'm including a photo or two of the measurements I've taken and the demensions I think are correct. My main question is the difference in the distance from the outside dust cup face and the inside of the rotor face. There is a difference of -.125" between the mustang rotor and the OEM rotor. What, if anything, should folks be concerned about?
Thanks
Fwiw, this is a rotor I machined to the specs above minus the OD reduction.

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Yes the difference could have a problem where the outer bearing will hit the spindle before you can tighten up the adjusting nut. I had this problem so I made a ring to go between the outer bearing race and the disk rotor to space it out.
 
ncysys said:
Hi Guys, I did machine the Mustang rotors (Raybestos 6004R) and worked great for my dart. There were comments about not finding the rear seal. Here are two options:
SKF seals SKF
Timken seals Timken® National® 8121S 8000 Multi-Lip Oil Seal With Loaded Spring, 1.73 in ID x 2.34 in OD x 0.47 in W, Polyacrylate Lip, 70 to 75 Durometer | Source Atlantic
I measured the seal surfaces and confirmed they are correct 2.34" outside dia, 1.734" inside dia, .47" thick

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what are the final machining specs you used ?
 
Do I understand correctly that the outer and inner wheel bearings used are the ones used for the original KH rotors ?
 
So, I have read through all 13 pages so far and I have been trying to study this carefully. I bought all the parts recommended but I am not sure if I am missing something here or not? It seems the SKF 16743 rear seal is a larger diameter than the SET 6 inner bearing race? So, if I have the stock 6004R rotor seal surface milled down to where the bearing race begins, it appears there will be nothing left for the new SKF 16743 seal to fit into, even after the bearing race area is machined down into the hub area by .271"?

I guess I am uncertain about the inner seal not fitting and if I misunderstood on which inner seal fits best after the machine work is all done?

Thanks
 
Mine was like this after cutting.
Later I had to cut the out side ring thinner as well because it did not fit inside the dust cover.

image (5).png


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Thank you, What wheel bearing hub seal is that that you are using, if you don't mind me asking? I also noticed the replacement hub seal diameter for an A-body front KH Disc brake hub is about the same diameter as the inner SET 6 wheel bearing cup?

So it looks to me as if you have the 6004R one piece rotor and hub inner seal area milled down to the area where the factory inner tapered bearing cup begins, and then that area taken down .271", you possibly could press in an A-body inner bearing seal after the inner bearing cup and tapered bearing were installed?
 
Hi,
My parts list from rockauto:
  1. RAYBESTOS - 6004R
  2. TIMKEN - 8121S
  3. BCA - NBA6
  4. BCA - NBA2
These are the parts I used. I took the original rotor and 6004R to machinist who replicated the inner diameters from one rotor to other (I also provided one set of bearing that I was using and the dust cove so he can cut the inner to proper size). Did a test fit, found out that the dustcover hole is smaller the the outside of the new rotor, cut that down as well and have been driving like that for the hole summer.
 
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