Two versions of a V-Slot wheel for OpenBuilds C-Beam or other matching aluminum extrusion.
One uses two 45 degree bevels as bearing surfaces, the other uses a completely rounded profile. Both parts use a standard 608 skate bearing that can be inserted from one side only. Both parts have an inner rim to place bearing in the center of the wheel.
Both wheels stand 10.5 mm when laying flat. Round wheel measures 32mm at greatest diameter, beveled wheel measures 30mm at greatest diameter. Both currently untested. Flat outer face of beveled wheel measures 6.5mm tall.
Holes should be 13mm (on center) away from the edge of the extrusion. Your mileage may vary.
Ensure that the layer start is set to random
Google Sketchup. Circles set to 90 or 60 segments (depending on size and allowable segment number).