Why do some gearboxes last longer than others?

Most industrial operations have processes or equipment that are regular maintenance issues. Those that require regular attention often drive most of the maintenance, repair and operations costs. However, why do some gearboxes seem to last longer than others?

The answer comes down to design, production and the application.


Robust gearboxes are born to run. Minimized bearing spans reduce shaft deflection and transverse torsion on the bearings and seals. Power density is balanced with gearbox rigidity to exert minimal stress on gears and bearings, and promote better gear tooth engagement.

Purpose driven gear arrangements allow each type of gear to do what it was designed to do, such as worm gears for changing direction and helical gears for efficient torque increase. Minimized seal/shaft linear speeds generate less heat and optimized housing designs provide plenty of surface area to promote heat conduction.

The ability to hold tight tolerances on housing and shaft dimensions allows the gears and bearings to perform at their highest level. Consistent AGMA Class 9 production gear quality ensures trouble free operation. Finally, control of the gear heat treat process ensures high quality material is matched with optimized machining to provide the best manufactured product possible.

A thorough knowledge of application conditions, loads, speeds and run frequency will ensure a well designed and manufactured gearbox is properly selected, sized and applied.

When all operation conditions are known and the selected gearbox is not oversized or undersized, the result is a trouble free, long lasting gearbox.

Through strength of design, high quality manufacturing processes, and careful product selection, gearboxes by Master Power Transmission are born to run, built to last and are here to stay. Contact one of our product specialists at 888-616-1094 for more information.