I couldn't find a printable U-joint for Deltabot rods that I liked, so I made one. The bearings give the joint high load capacity with low friction and zero wear.
Yes, it could be much smaller with special bearings (like the Kossel Pro U-joints) but 623zz is a common and cheap size that fits M3 hardware.
The rod pocket is sized for TriDPrinting.com 5.8mm rods, but feel free to modify the size to fit whatever you want.
I will be posting up-rev'd files for overall size and range of motion as I iterate the design. No promises that different revs work together.
| Delta_U-Joint.skp | 292.6KB | |
| Delta_ujoint_inner_r3.stl | 119.7KB | |
| Delta_ujoint_inner_r4.stl | 139.7KB | |
| Delta_ujoint_outer_r3.stl | 152.0KB | |
| Delta_ujoint_outer_r4.stl | 151.7KB | |
| Ujoint_Rod_Jig.stl | 194.1KB |
