Originally Posted by morris
Check your bolts that hold the caliper bracket onto the spindle. They have a tendency to walk out and have even cut a wheel in half (member posted pics) if that's it use locktite
This happened to me. One bolt walked out completely, the other was close. Caliper ground up the backside of a brand new rotor. Came home and pretty much poured Loctite on the caliper bracket bolts.
Also check your caliper slide pins. Regrease them while you're in there.