Spur Gearhead GB5P, the most popular gearhead, is a multi step gear box with all polyacetal gears which rotate on steel spindles which are polished to a mirror-finish and introduced between metal plates with a plastic frame. All bearings are permanently lubricated and therefore require no maintenance. Motor is attached to the gear box by means of spring clip. Thicker shafts (Ø6-7mm) mounted in robust bushings (Ø12mm) are available (GB5PS). Similarly the gears at the output end can be metal (GB5PH) with thick shafts & robust bushings (GB5PHS). Sintered gears variant also possible (GB5Si) GB5P can also be combined with small DC Motors. To achieve higher gear torque,GB5P can be mounted on GB4.