A spindle or axle of a wheel.
A stimulus or driving force.
A bar or beam of wood or iron, connecting the opposite wheels of a carriage, on the ends of which the wheels revolve.
A vertical cylindrical machine that revolves on a spindle, used to apply force to ropes, cables, etc. It is typically surmounted by a drumhead with sockets for levers used to turn it.
A rotating spindle used to move recording tape through the mechanism of a tape recorder.