Quote:
Originally Posted by sanddrag
In ours there was no free play when new. I would suspect the Double-D shaped end of the shaft is rounding out in the plate (I am correct in saying these are driven like that right?). It may yield until some point and then not go any further. If you have that much free play though, I'd suspect it would keep opening up. Hard to say.
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It will continue to open up. If you are using it for an arm, it is likely being overloaded, especially if quickly reversing direction. We have doubled up these transmissions on the arm shoulder, and have eperienced similar results, but not failure. TIG welding the shaft to the output plate by an experenced welder has been done in the past.