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Re: Vex mecanums
We found the 6" VEX mechanums where good for about a regional & 1/2 before they started breaking the rollers. The same on our practice bot. It appeared to me to be a fatigue thing. Fortunately replacement rollers are available. We treated it as a maintenance item.
The mechanums are naturally torque limited so I would be really surprised to see bolts breaking. With Versa system, the torque is not transmitted by the bolts so you should not see properly torqued bolts breaking.
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