I run a small shop.I own a brake lathe and have never had a problem machining a drilled or slotted or factory rotor....If I have the adapter to chuck it up to my lathe,you got a machined rotor.
Lathe cuts from the sides,when spinning and feeds out from inside of rotor surface to the very outer surface,when the bit that is cutting the surface hits a hole or slot it cuts nothing until it get past that then continues to cut............
Machining a slotted, grooved or drilled rotor is no problem.
TXDart
