Quote:
Originally Posted by Oblarg
Had this problem last year when we used two of them, direct-driven, to actuate our roller arm (after both failed as described, we switched to pneumatics). If you look at the spec sheet, it actually does specify that this is the standard failure mode if you exceed the maximum rated torque - I was surprised, too, until I looked it up.
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If you open up the PG-188 gearbox, the shaft has a couple of triangular notches in them. That's where ours broke. I'm not sure if they're put there to create a known failure mode or not. If so, I'm guessing the thinking is that it's relatively simple and cheap to replace the shaft rather than the gear assembly.