Al
Don't throw away the old contact wheel. Just grind down past the bad spots using 60 grit paper glued to a board held against the wheel as it turns. Use a dust mask, safety glasses and old clothes, the black neoprene dust doesn't smell to good. when finished refacing the old wheel, get a strip of 2 inch wide natural rubber, usually obtainable from a local rubber company or call Hampton Rubber co in Hampton VA. sand these off at a 5 to one slope on the end and wrap it around the contact wheel stretching it slightly. Mark where the bevel on the other end needs to be and mark it with an ink pen. then bevel it to match the first bevel. Clean everything with acetone or denatured alcohol and glue up with contact cement. Once the cement sets turn on the grnder for a second or two to see if it is closed to balanced. If it doesn't jump around, then use the 60 grit board to grind it smooth then follow with a 100 or 120. Don't let the natural rubber grab the 60 grit smoothing board go easy. The fact the wheel is wider than the contact surface won't matter should be a quarter inch on each side.
Jim A.
