Quote:
Originally Posted by Jon Stratis
Sure, it's a stress point... but is it really that big of a deal? We've used some AndyMark Toughbox Nano's in several applications (including drive train) without any issues at all, and they use retaining rings. In fact, we have one pair of Nano's that's made it through two seasons on two separate robots, with a season in between where it was used for practice. That experience would seem to indicate that using retaining rings may not actually be all that bad.
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It is a big deal if the snap rings are placed between loads on a shaft. They are a major stress riser then. They are fine on the ends of a shaft, but I would never (again) put them between torques, especially on higher reductions.
In this application - can you just have bearing / gear / bearing on the inside of the tube, and shaft retention handled elsewhere? That would require an inner width of only .75, which lets you use 1" wide .125 wall tubing.