Failure analysis of a pinion of the jacking system

Experiment results showed that the superficial heat treatment of the pinion was not uniform and there was no hardened layer at the tooth root. At the same time, the hardened layer near the pitch circle had been worn out for long-term service, thus the surface hardness of the failed pinion was lower than that of the rack

More informations : Failure analysis of a pinion of the jacking system of a jack-up platform.