This is an authentic Powermatic replacement part that has been sourced from the original manufacturer to be used with planers. The metal gear attaches to the lead crank screw and is used to engage the screw when changing the depth of cut. This item is sold as an individual replacement part.
This ball bearing is assembled by the original manufacturer. It is used in a variety of Powermatic, Jet, and Wilton power tools. Ball bearings serve to protect moving parts from wearing each other down and from damage due to incorrect position/direction. This is a high-wear part and will need regular replacement. This part is sold individually.