#Gear : A rotating #machine part with cut teeth that mesh with another toothed part in order to transmit #torque; in most cases, the teeth on both gears are identical in shape.
Gear ‘A’ has 30 teeth and gear ‘B’ has 20 teeth. If gear ‘A’ turns one revolution, gear B well turn : A/B = 30/20 = 1.5 so B well turn 1.5A = 1.5 revolution .