pic: Stripped VexPro gear

[Mechvet]

Originally Posted by R.C.

For the 14T I would personally only use the steel in anything that takes moderate to high load and the aluminum one for low load. Or just use the steel one all the time since the weight difference is minor.

Absolutely. Our fix was to go grab some 3/8 AM hex gears and face them down to the required width. No issues after we switched out the aluminum gears.

Originally Posted by pilleya

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Also teams are putting much more torque on them than usual, for example if a team normally uses a shifting gearbox with a 11fps low gear on a year with an open field and 4inch or 3.25inch wheels, and then they change to 8inch wheels and a 6fps low gear, then the final stage is experiencing almost 4 times the torque.

This is the differing factor.

However, two years in a row of COTS gearboxes failing us has prompted the decision to return to custom boxes. They're heavier (and a touch more expensive), but they never broke.