I've got an electric motor which drives a two-geared system. The first gear is on the motor's shaft. And, the 2nd gear drives a shaft via a a sprague bearing (spins freely in one direction/locks in the other), which is press fit in to an aluminum journal in the center of the larger gear. I'm using a sleeve retainer that's rated to 3000psi shear when pressing the sprague bearing in to its journal. But, it is not holding even after two days curing. The sleeve retainer states full cure in 24 hours, FYI. And, it's a new tube, as I assumed my sleeve retainer may have gone bad when this happened the first time. The entire bearing spins in its journal when the motor is slowly spun up (I'm not applying full torque to the gear train from a stop).(adsbygoogle = window.adsbygoogle || []).push({});

Unfortunately, I don't know the math to calculate the load my drive system is putting on the sprague bearing's press-fit surface. And, I'm curious is 3000psi shear strength is enough, or if I have another issue.

I'd like help calculating the maximum force in psi that this system could apply to the bearing journal surface to be able to compare it with the sleeve retainer's rating.

Here's the details:

Electric brushless motor with a rated max output of 5200 watts.

see here if I didn't provide enough info:

http://innov8tivedesigns.com/parts/brushless-motors/scorpion-hkiii-4035-560-brushless-motor-kv-560

the gear ratio is 11/106 (that's the number of teeth on each gear). the reference diameter of the smaller gear is 11mm, and the reference dia of the larger gear is 106mm.

the shaft driven by the larger gear that passes through the sprague bearing is 6mm in diameter. and, the journal that the sprague bearing is pressed in to is 15mm in diameter.

Let me know if you need more info. And, thanks for any help.

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# Can someone help a non-ME

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