norvalwilhelm
Well-known member
I finished trueing up the rotors this afternoon and got them within .002 or .003 runout. The next thing is to balance the assembly.
I made a balancer witch consist of a very fine bearing and a plate that just matches the internal hole in the rotor assembly . You mount it in a vise on in my lathe but the 14 inch diameter rotor hits the lathe bed.
The rotor is then installed on the balancer , the heavy spot rotates to the bottom, this spot is marked and you start adding weights to the opposite side until you come up with a weight that neutralizes the heavy weight and the rotor spins freely stopping at random.
While this homemade tool might look crude it is extremely consistent time and time again the same heavy spot will show up and even a small piece of solder looped through a hole will show up. It works
I machined a small piece of copper and screwed it to the light spot. I made a number of adjustments until I came up with the right weight.
Normally I would have just removed weight from the heavy spot but at the cost of these rotors and all the horror stories I hear about cracking I just added weight
Next the hat is removed, put on the lathe where I polished it with emery paper, steel wool, rubbing compound and finally Blue Magic #1 and a final coating of wax. Reassemble the 18 screws with loctite and put on the car, install the caliper, the new pads and call it a day.
I made a balancer witch consist of a very fine bearing and a plate that just matches the internal hole in the rotor assembly . You mount it in a vise on in my lathe but the 14 inch diameter rotor hits the lathe bed.
The rotor is then installed on the balancer , the heavy spot rotates to the bottom, this spot is marked and you start adding weights to the opposite side until you come up with a weight that neutralizes the heavy weight and the rotor spins freely stopping at random.
While this homemade tool might look crude it is extremely consistent time and time again the same heavy spot will show up and even a small piece of solder looped through a hole will show up. It works
I machined a small piece of copper and screwed it to the light spot. I made a number of adjustments until I came up with the right weight.
Normally I would have just removed weight from the heavy spot but at the cost of these rotors and all the horror stories I hear about cracking I just added weight
Next the hat is removed, put on the lathe where I polished it with emery paper, steel wool, rubbing compound and finally Blue Magic #1 and a final coating of wax. Reassemble the 18 screws with loctite and put on the car, install the caliper, the new pads and call it a day.