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Unread 04-29-2015, 11:26 AM
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Re: Urethane Drive Wheel Questions

Quote:
Originally Posted by Andrew Lawrence View Post
The wheels are rated at 800 rpm, so anything faster than 14 ft/s on a 4" wheel is going out of recommended spec.
I actually called the company about a variant of these about a year ago. They say they are rated for 800 rpm but that is due to balancing. They said this is so people don't order wheels or rollers for high speed applications without their knowledge. I clarified with them that up to 1200 rpm would be fine and still not require additional balancing. They also recommended that if I was using it for a shooter wheel (like 2013 disk shooters) I would have to note a high speed use and request balancing (I seem to remember up to 16000 rpm being ok but you could call again to make sure). They were also very nice and sent sample disks of about 10 different types so I could compare relative friction and durability between them. Also a caution, they can cut treads into the material for you for extra grip but unless you are ordering 100's of wheels all treads were hand cut as opposed to molded (molds cost 500$ at the time) and this boosted the cost quite a bit. Lastly, they at the time would take hubs to make the wheels from so you could machine your own or they could machine them for you (ex: custom spokes or team number) but their machine time was fairly expensive. You can easily blow 399.99 on one wheel with all the fixings.