Gearbox Maximum Torque

[EricVanWyk]

Disclaimer - I am an electrical guy, please excuse my ignorance.

Some of the students prototyped a lifter mechanism that featured and subsequently destroyed a P60 132:1 gearbox. The final planetary stage was almost entirely bald.

It is easy to gut-feeling see why it broke in retrospect, but I'd like to be able to teach them how to predict this ahead of time. Trouble is, I couldn't find any specification on this gearbox that would give me a good place to start.

What is the name of this 'max torque' spec that I am looking for, and where do I find it? Is there a collection/spreadsheet of this info for common FRC gearboxes?

Thanks!


PS: If it helps you understand the number I want: I'd measure this by stalling one side of the gearbox and cranking on it with a torque-meter until it broke. Does this number change with speed?

PPS: What other info am I missing?