drgnbdy
+1y
If you don't machine the rotor the seal doesnt seat right and it also doesnt let the bearings slide up far enuff on the shaft so that they ride in the correct place on the spindle shaft. Not sayin it doesnt work.....just doesnt work correcttly...will eventually wear the bearings out and possibbly damage the spindle. And when the seal doesnt seat right it allows trash, dirt, debris to get in from the back side. If your gonna do it do it right the 1st time. Just my opinion.