A shaft found in most overhead cam engines that is used to drive the distributor, fuel pump, and oil pump.

see Countershaft

intermediate shaft

A jackshaft is a device for turning the wheels of a locomotive. It is essentially an axle with no wheels. Each end of the jackshaft has a crank pin and a counterweight.

Also knon as Mid-Drive: a gear cluster in the middle of the bike which adds gearing.

Electric operator installed next to the door coming complete with a chain hoist for emergency manual operation. It can be used with all types of track configuration.