Worm Gears This name is used on a #gear assembly consisting of a worm-like screwdriver and a worm #wheel (similar to the ordinary gear).

The #worm #gear is made up of a cylinder wrapped around it teeth can be spiral and may be one tooth or a few
#Engine Starter is a DC electric #motor that converts electric power from battery into #mechanical power that used to turn a #gear in the engine
#Hydraulic #pump is a mechanical source of power that converts mechanical power into hydraulic energy (hydrostatic energy i.e. flow, pressure). It generates flow with enough power to overcome #pressure induced by the load at the pump outlet.
There is a multiple designs for the hydraulic pump
the #gear hydraulic pump is a simple effective design and cheap
How manual #gear box works ?
The gearboxes that used in cars are used to increase torque while reducing the speed of a prime mover output shaft . This means that the output shaft of a #gearbox rotates at a slower rate than the input shaft, and this reduction in speed produces a mechanical advantage, increasing torque.