Quote:
Originally Posted by FrankJ
It does not look like fatigue to my admittedly under-trained eye.
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Looks like it might have been... too little detail to tell for sure.
IMHO snap rings are the way to go unless what is going on the shaft already is in essense a shaft collar (like a keyed sprocket).
What WILL cause severe problems under torque is drilling a hole through a shaft and putting a bolt/cotter pin. Just ask anybody who saw the 1747 bot at Cage match 2008 before elims. We sheared a steel shaft that drove the slide lift on the manipulator right where it was drilled for a drive sprocket. had we keyed the shaft and used the gear like a shaft collar it wouldn't have failed.
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Dean's List Semi-finalist 2010
1747 Harrison Boiler Robotics 2008-2010, 2783 Engineers of Tomorrow 2011, Event Volunteer 2012-current
DISCLAIMER: Any opinions/comments posted are solely my personal opinion and does not reflect the views/opinions of FIRST, IndianaFIRST, or any other organization.