Failure Analysis of Gearbox - Image of Failed Gearbox
Failed Gearbox

We performed a failure analysis of elevation gearboxes used to control an earth-station antenna. It was found that 3 gearboxes had failed at three separate locations, with less than six years of service. Metallurgical tests and engineering analysis were were also done.

We determined that the gearbox was of sound design and of quality fabrication. The stage gears did not show any signs of misalignment, wear or pitting. Lubrication appeared adequate. Observed damage was limited to the output pinions and ring gears. It is likely that the tooth or teeth on the output pinion initially broke, and the harder pinion teeth (400 + BHN) subsequently damaged ring gear teeth.


We perform failure analysis on gearboxes, industrial machinery and other equipment.

Give us a call to discuss your engineering challenges.

Related Projects

Metallurgical & Engineering Evaluation of Cracks in Aircraft Landing Gear
Failure Analysis of a Boeing 737 Flight Control System
Analysis of Defects on Blades of 304 Stainless Steel Mixer

Similar Services

Forensic/ Expert Witness Services
Engineering Troubleshooting


Tom O’Donnell, PE
Murals of our Work

(412) 835-5007

Scroll to Top