Technical Help ID these brake rotors

It's more money, but I like to reface rotors on a flywheel grinder. You can grind only the required amount on each side independently, and it provides an original finish.

 

I called about a half dozen places this morning, nobody within 20 miles will turn rotors anymore. I found a place that very reluctantly said they can do it for $200, I told them the rotors are already off the truck, but she said she can’t change that in the system.

So if I can’t replace them, then yes I will have them turned

 

Did you check with your local NAPA, Car Quest, or O'Reilly?

 

I'd want to know what they are...period. There can be only so many choices for these rotors. If it were me... I'd take one with me to an 'old school' auto parts place, set it on the counter, then go through the process of elimination. I've done this very thing many times and had things eventually work out. Just recently went through this on a trans tail housing bushing and seal.
You just need to find a good parts place that's managed by car guys. Car guys help each other out...right? Good luck!

 

But, I would be doing the what-is-its with the old school shop guys while the rotors were on their brake lathe.

 

I looked up disk brake conversion for 1940 Chevy Truck and got a number of hits. Some have brackets that look a lot like yours. The point is they all are about the same thickness, and all their rotors need to fit on your spindle. Worth asking for a part number I think.

 

I was able to get the rotors turned, cost $80 to do them both.

I took the numbers off the old bearings:
Outer: M12649
Inner: LM67048 (I think, could barely read it)

I’ll order new bearings, but now the big mystery is what seals do I need? The old seals had no numbers on them.

Still wonder what the rotors are from. The weird thing is that when I ordered the chevelle rotors that turned out to be wrong, I also order a set of pads that are listed for a 70 Chevelle, but the funny thing is that the pads are identical. So I’ll use the chevelle pads I guess.

but anyway, given the above bearing part numbers, does anyone happen to know what seals I need? Thanks

 

Measure the OD and ID of the seal and any part store should be able to find one.

 

I would take my rotor plus the spindle size to my bearing supplier and they should be able to sort out a suitable seal