The rotary speed is usually modified.
Bevel gears have a conical shape and transmit torque between perpendicular shafts.
Simple gears are straight toothed wheels. The teeth on helical gears and bevel gears are set at an angle and are thus able to transmit more power. The optimal curvature of the tooth flanks for the teeth to engage was calculated by Leonhard Euler in 1750. Zahnr der bereits um 330 v. Chr. Power transmission assemblies Power transmissions and driving gears are assemblies of moving components, which modify the speed and torque between two shafts.