Gearbox Selection and Use: Frequently Asked Questions

This guide answers the questions that come up when choosing and running a gearbox or geared motor for a machine: which gearbox type, which ratio, how much torque at the output shaft, what motor power, how the motor connects to the gearbox, and what to check if noise, heat or an oil leak appears in service.

The examples use the values on the site's pages for HEM worm gearboxes (HEM30–HEM130), K series bevel-helical, M-HEM foot-mounted helical and HF parallel-shaft gearboxes. These values are for preliminary selection; the final frame size, ratio and service factor are confirmed against the catalogue and in the quotation.

To plan the gearbox and motor together, send us the machine type, the required output speed (rpm), the motor power (kW), the daily operating time, the mounting arrangement and the quantity on WhatsApp. Motors suitable for gearboxes are listed under electric motors for gearboxes, and the models on sale are in the buy electric motors category.

If you are replacing an existing geared motor, send photos of the motor and gearbox nameplates as described on the find an equivalent from the nameplate page.