Gears adjust the power provided by an engine or motor and allow for changes in direction. They are found in the gear case on the front of cutting machines (such as grass cutters), in the gearbox of hedge trimmers, as well as in the scanning mechanism of marine radars.

Clutch drums transmit engine power to or isolate engine power from other drive components. they play a role in starting and stopping chainsaw chains and mower blades. They are found in a wide variety of equipment including chainsaws, grass cutters, hedge trimmers, power sprayers, compactors, circular saws, and earth augers.