Quote:
Originally Posted by Richard Wallace
Max Rhino drive RPM is the team's choice. AM options for gearing with the TB Mini (easiest to mount on a Rhino module) range from 12.75:1 down to 5.95:1. Since the Rhino timing pulleys are 1:1 (42 teeth on drive and driven), track pulley speeds will be in the range 415 - 890 RPM. My team plans to use a ratio between these extremes, so about 670 RPM max is the target for us.
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PV of the SAE 863 is 35000. V @ 900 RPM is 88.5 SFM. So P is 395.5 psi. Projected area for one of those bearings is .375 sq in. So max load on one bearing is 148.3 lbs. You're using two, so max load per pulley is about 300 lbs. That's combined load from tension and weight, but I think you should be fine regardless.