Quote:
Originally Posted by Paul Copioli
This failure mode has almost nothing to do with the transmitted torque to the wheel. The way these wheels are designed to eliminate the "mecanum bounce" flexes each individual roller from tip to opposite tip. This deflection causes cyclical stress across the roller hub. We have a stress concentration at the base of the roller boss (where the shaft bushing is located) that sees a fatigue stress at around 4 hours of driving time for the 4" mecanum.
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That makes sense and matches from what we have seen in testing.
Thanks Paul !