Gear definition
Wheel-like part with teeth cut into the rim. When one gear meshes with another gear, it causes the second gear to drive the other and in this way transmits power. When the gears are different sizes (different number of teeth on each gear) the mechanical average is changed. Also see axle end gears , bevel gear , camshaft gear , cluster gear , constant mesh gears , crankshaft gear , flywheel ring gear , helical gear , herringbone gears , high gear , hypoid gear , idler gear , intermediate gear , low gear , passing gear , planet gears , reverse idler gear , ring gear , sliding gear , spider gear , spiral bevel gear , spur gear , steering gear , straight-cut gear , sun gear , timing gear , wide-step gearing , and worm gear .