Compatible OPC drum haven't a metal gear. This gear should be remove from the original OPC drum with help a flat screwdriver and it uses in compatible OPC drum.
Also searched as:
Canon i-Sensys MF 5940,MF5940, i-Sensys5940, iSensys5940, i-SensysMF5940, iSensysMF5940, Canon MF5940DN, Canon MF 5940DN