Rockwell/Delta, Homecraft 4" Jointer Cutter Head Bearings. Set of 2. These bearings are used on later model (post mid 60's) 37-290 4" jointers. They will not work on early model 37-290 models that used extended race bearings. Bearings have a 15mm ID, 35mm OD, and are 11mm wide. Replaces Rockwell/Delta Part Number: 920-04-010-7272 These are rubber sealed bearings and are dimensionally the same as the original.