Abstract: A type of modifiedhourglass worm gear drive, frequently called typeII worm gearing for short, has various favorable meshing features. Its sole shortcoming is the undercutting of the worm wheel. By adopting a slight ...

Abstract: The mathematical principle for calculating the contacting curve length of the involute Helicon gearing is put forward. The transient contacting curves within the conjugate zone are attained. The approximate analytical ...