u joint that can move like a u joint but not handle stress like a u joint

used on vehicle driveshafts

has built in lock collars on the end of yokes, uses 1/8 in fine thread bolt at 1:1 scale.

1:1 scale has a 0.75" bore on the yokes, and has 12 splines. 

Snap rings do NOT fit on 1:1 scale.

how to assemble:

1. print 2 yokes, 1 cross, 4 caps, and optionally 4 snap rings
2. make sure caps fit onto cross and into yoke holes, if not you will have to sand them
3. put caps into yoke slots, make sure they are mostly sticking out
4. put cross in between the caps and push caps in
5. put snap rings, if you printed them, into little slots in the yokes. The snap rings hold the caps into place so they don't slide out.