This 6002rs bearing fits my Ridgid random orbit sander. It lasted about 12 hours with very heavy use (I sanded the floor). When it failed, the bearing exploded devastatingly into pieces, and very hot ball bearings and metal fragments rolled in different directions. I would say this bearing lasted about 75% longer than the original bearing; The original bearing stuck but did not break. Bottom line: if you're buying this bearing to replace a failed bearing, buy 2 so your work isn't interrupted.