Bevel & Knob Gears - Max Torque

[AxeSlash]

Has anyone measured the maximum torque that the various knob and bevel gears can take before they deform/crack?

I managed to find some figures for spur gears that seem to suggest around 5 Ncm per tooth ( https://brickexperimentchannel.wordpress.com/2023/11/15/characteristics-of-lego-parts/ ), but obviously bevels will be less.

If I had a sensible way of testing and calculating this myself I would...is there any simple method that doesn't require a special device that measures torque?

Need this info because I'm trying to put together a drivetrain calculator that tells you if you're going to damage an axle or gear!

Thanks

 

 

Edited April 19, 2024 by AxeSlash

[aeh5040]

I don't have specific data, but in my experience knob gears perform very poorly under load especially when run for an extended period. The surfaces degrade quickly, increasing the friction, and after a while pieces start chipping off the teeth.

[Zerobricks]

From my experience 28 tooth bevel gear inside the 7x11 frames wth axles supported inside and outside work the best.

[AxeSlash]

Thanks guys, but what I'm looking for here is numbers that I can crunch in a spreadsheet, not general construction advice.

Or alternatively a simple test method.

[1963maniac]

Would this help: 

or this: