Rockwell,Delta 6" Jointer Cutter Head Bearings. Set of 2.
Bearings have a 17mm ID, 40mm OD, and are 12mm wide.
These bearings are used on later model (post mid 60's) 37-220 6" long bed jointers. They will not fit early model 37-220 models that used extended inner race bearings.
They are also used on 6" motorized models 37-255, 37-280, and 37-285
It is recommended that you verify your current bearings before ordering.