What is the useful life of a S-11 Refacing Disc?
The useful life of a S-11 Refacing Disc is only 1 refacing. Regardless whether the disc has been used for 25 or 50 cycles, the refacing disc should be discarded. Refacing with a used disc may change the wear coefficient of the wheel faces, and invalidate your test results. I am using the CS-0 wheels with S-33 or S-42 sandpaper, and find that glue sticks to the wheels. NEMA test method LD3 recommends using a light dusting of zinc stearate to rectify this situation. Another alternative is to use a light dusting of talc powder.
