Quote:
Originally Posted by Jeffy
When you say extrusion, did you use something other than the normal 2X1 tubing?
Also whats up hex bearings?
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Yes, we use 1/8" 1 x 2 aluminum extrusion.
The hex bearings are a problem because they shouldn't exist, at least not for 4 dollars. It seems that the vex pro ones are just normal bearings broached to fit a 1/2" hex shaft. The problem with this is that the added force on the corners of the shaft crack the inner race and render the bearing useless. This happened to use every couple hours of driving in practice, and a 2 times in competition. If you use hex parts, do it with round bearings if at all possible. (you can machine down a 1/2" hex shape on 5/8th shaft)