Specifically, the service identified a single high-speed planetary pinion gear that had fractured. But an internal Safety Investigation Board report -- which has not been made public -- showed ...

The pinion gear then completely failed ... While both the publicly released AIB and the internal SIB blamed this single gear, ...

Pinion gears need to grip a motor shaft tightly – normally done with a screw through the gear and onto the motor shaft. But a motor and its shaft can get quite warm when doing a lot of work ...

Most car-based vehicles use rack-and-pinion steering in which the steering wheel turns a pinion gear that moves on a rack to turn the front wheels. Others use recirculating ball systems in which ...

But last fall they also showed us some nice-looking 3D-printed titanium crankarms for Pinion gearbox bikes, that could save you an easy 170g. That got us thinking a bit… what was the carbon ...