Quote:
Originally Posted by Madison
Can people talk about their coefficient of friction with carpet as compared to roughtop or wedgetop tread?
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Unmodified Colson wheels have a coefficient of friction of about 1.1-1.2. In last 2009, we did some tests with Colson wheels and determined cutting thread in them increased their coefficient of friction by 30% on a similar carpet to the FRC playing field (I want to do better tests to verify these results, but subjective evidence from watching our 2010 robot drive around confirms this). We really like these wheels, and will likely continue using them whenever possible.
Quote:
Originally Posted by Madison
They appear to come with a polypropylene hub. Are the delrin bushings they're furnished with from McMaster-Carr removable? How about the bearings?
I don't know as much about these wheels as I should and want more options for wheels available to me. I've been considering what it'd take to, say, press this hub from AndyMark into this wheel with its 1 3/16" bore. You could then match drill and bolt on a sprocket.
Discuss! |
A hub diameter of 1.20 is pressable into the wide Colson wheels if you have a beefy arbor press. We've always used live axle setups with the 1.5" or 2" wide Colson wheels on 228, since the sides of these wheels aren't very flat and I'd be worried about the drill bits wandering. When I was on 190, we used 7/8" wide Colson wheels, and those were much easier to drill a three/six hole pattern into.