does anybody have a good place to buy shaft collars in fairly large quantities like 50-100 (hopefully for a deasent price) i know you can get them from vex but only 16 in a bag:mad:. i use them like crazy and I’m not in any comps so its no biggy
i took these measurements
outer diameter- 7/16"
set screw- 8/32"
Yes… The set screws are much too soft sometimes. Ours strip frequently, just because we tighten our important axles a lot and the screw can’t handle it. I’ll be on the lookout for some more… but even at 17 cents a piece, with 15 teams money becomes an issue.
Those are the hex-driver sizes for the screws. I believe the O.P. is asking about the axle bore in the shaft collars. I believe the bore is 3/16", but I’ll double check with a micrometer this evening when I get home from work.
Axle size is 1/8" square, which means the diagonal across the axle is
[INDENT]√ ( 0.125 ² + 0.125 ² ) = 0.1768"[/INDENT]
5/32" = 0.15625", which is 12% too small
3/16" = 0.1875", which is 6% oversized (just about right)
Maybe, but 12% undersized would require quite a bit of rounding. Also, the shaft collars are not very snug when the set screw isn’t tightened. Tonight, I’ll measure and post the I.D. of the shaft collar, and the diagonal thickness of a VEX axle.
*]Flat Thickness = 0.125" = 1/8"
*]Diagonal Thickness = 0.158 - 5/32"
The rounded edge on the axle must be in the neighborhood of 1/64" radius, but I don’t have a good way to measure that directly.