D4 and D3 Bearing
Original OEM factory bearing for the model D4 SE (Special Edition), D4, and D3C Rainbow system. On the D4 SE (Special Edition) and D4, this bearing is located on top of the armature in the bearing bridge and also in the motor base assembly. The metal shield is installed towards the carbon brushes.
When installed in the model D3C motor, this bearing is located in the bottom motor housing. Again the metal shield is installed towards the carbon brushes.