I use and love 3M radial wheels. I use the 3/4 inch discs at the
bench and the 3 inch discs on the buffer for pre-polish clean up. I
especially like the 3 inch blue 400 grit discs stacked with 6 discs.
I usually get about 6 months of wear out of the 3 inch discs then the
bristles start breaking off. Last month I ordered replacement 3 inch
blue radial disks from Stuller. In less than a week the bristles
started to break off and by two weeks they were bristle-less.
And before you ask, I did mount them correctly. I’ve been using
these disks for years. Has anyone else experienced this problem? Does
3M have a quality control problem and there was a bad batch?