Thanks Jack.
I actually tried to do it right. I found a length of 195mm ID steel pipe and parted a length off so that it would support the entire way around the rotor, but I was right on the edge of the braking face, so the 'top hat' section was captive inside my pipe.
Hard to say what they did, but maybe it was crooked or something? Now I just need to find new rotors and move on.
After hours of searching last night it seems that only Wilkinson advertise a 'standard' rotor for my 74 L model. They are not expensive, but I know the shipping will be due to the weight.
Surely somebody has come up with a modification for a slip on rotor for these cars using a common and available rotor?
I thought about it during the night. Purchase a new set of wheel studs with the knurling right at the head like Toyota/Ford use. I'm using Bob's axles so the head of the axle is really thick and would support the studs beautifully. Assemble everything as normal but without the rotor.
Then find a rotor with a deeper top hat section that slips over from the outside and locates on the new studs and also the deep centre flange of Bobs axles.
I had a rear rotor in the shed from an early 90's Lexus SC400. I laid my back wheel down on it's face and then sat the rotor in there and aligned the stud holes by eye. Then I grabbed my new axles and sat it in there. The centre bore of the Toyota rotor was a perfect fit on bobs axle. There was still 10mm of the locating flange sticking through the rotor and this fitted perfectly into my wheel. SO you only have 10mm to locate into the wheel, but many cars only have 6mm anyway.
As the Toyota / Lexus has a small handbrake drum inside the rear rotor, the main body of the axle fitted perfectly in there.
The standard top hat on the solid rotor appears to be 42mm high from the rotor face. Bob's axle heads are 14mm thick. Toyota rotor face is 5.5mm thick.
All one would need to do is some mathmatics to
establish the top hat height required to put the braking face of the rotor in the middle of the caliper and it shouldn't be too tricky to do that.
I just did a quick drawing. Considering rotor is 18mm thick (>???<) and original top hat is 42mm high from the rotor braking face then its 64mm centre of caliper to mounting face for the wheel.
If I used a slip on rotor from any 114.3 PCD 5 stud configuration Japanese or Ford car with an internal rear handbrake (so it will take the axle) then I would need to find a rotor with a 55mm top hat height to maintain the same 64mm to the centre of the caliper from the wheel mounting face, which would now be on the rotor, not the axle.
This would make it so much easier to change rear rotors, never having to go through this hell of dissasembly and trying to find tools to get 400lbs out of that split nut.
I need some clarification on what thickness the standard rotor is as mine are 18mm and used.
What's your thoughts Jack?
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