Parabolic and wave-shaped cogwheels

Cogwheels are everywhere! Transmissions and gearboxes accompany our daily life. Constant improvements have made them more specialized for all versatile types of applications. After 2300 years (the first cogwheel was invented around 300 bc), one might think the development is complete. But there is always a demand for products with improved properties: scientists of a Bavarian University accepted the challenge and have taken the cogwheel to the next level.

Additive manufacturing processes provide the key to improving the properties of gears in direct engagement for power transmission and gear ratios. Numerous properties can be improved by a wave-shaped or parabolic tooth flank design in contrast to conventional cogwheels. Smooth running reduces noise, vibrations and abrasion. Larger contact surfaces increase power transmission. Off-axis teeth design compensates bearing clearance and enables adjustable axial forces.