Offshoreonly.com - Drive Ratio and Durability

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- - Drive Ratio and Durability - Any correlation??? (https://www.offshoreonly.com/forums/drives-lower-units/235792-drive-ratio-durability-any-correlation.html)

Quote:

Originally Posted by audacity (Post 3172792)

zx gears are bevel gears=lower vibration than a straight cut gear like the xr's. the xr are more durable.

I would have thought the XZs would be more durable with the bevel cut (more contact patch).

long term durability with less load. then yes. the straight cut xr's can handle greater loads.

have a look at the 2 side by side and you will see for yourself.

it's about money and the manufacturing process as well...having 20 years in engineering powertain development and testing i've seen it all...on a new product at ford the goal is to pass all of our testing specs. then the next goal is to take money out of it because it's too good.

have a look at a t53 turbine planetary gear set. they are small and precise but rarely fail with well over 1500hp going through them and taking 25,000 rpms down to 6,000 rpms (rough #'s)...actually that bell gear there has had some issues with resonance frequency failures.

kinda cool...thought i would share...