Bearing

I was bored on a Sunday Afternoon and decided to draw a bearing, then I got tired and didn't feel like making a complicated retainer so I attached some blocks to the inner race, it should work anyways, I will post pictures when I find the time to print it, I uploaded the SketchUp file in case someone wants to modify it.

Outer Race Diameter 40 mm

Inner Hex 7.3 mm

Balls Diameter 4.5 mm

Tolerance is 0.5 mm