Hi all!

I have gearbox housing that is designed on the maximum torque case which has 1000 s duration. I'm wondering how many load cycle of bearing will appear during this time. Is next formula correct:

Number of cycles=number of teeth* shaft rotational velocity*case duration

If it is, number of cycles will differ from input and output shaft due to different number of gear teeth in input and output gear and for different velocity?

Thank you!