Drive Shaft for Sander 6 x 48 Belt Sander Finishing Machines built prior to 1975. These machines used 920-06-020-5334 and 920-08-020-5339 extended inner race bearings which are more expensive and a narrower Spacer # 904-10-031-3806. The newer shaft 406-03-106-0002 can be substituted if bearing 920-04-020-5360 and bearing 920-06-020-5334 and spacer 406-03-104-0003 are substituted as a set.