Optional for parallel shaft helical, helical-bevel and helical-worm gear units. The TorqLOC^® hollow shaft mounting system is used for achieving a non-positive connection between the customer's shaft and the hollow shaft in the gear unit. As a result, the TorqLOC^® hollow shaft mounting system is an alternative to the existing hollow shaft with shrink disc, hollow shaft with key and the splined hollow shaft. The TorqLOC^® hollow shaft mounting system provides the advantages of easy installation and de-installation, and saving costs.