kossel mini magnetic ball joints

thingiverse

I made these parts called rod_piece using PLA. The part called Teflon, however, is not printed on mine - they're actually manufactured in a Schaublin lathe, and I'm forever grateful to Khun Chai and Khun Racine for their help with this project. Thanks a million, guys! Yes, these parts are indeed made of Teflon. The cylindrical magnets N52 and 10mm bearing balls GRADE 100 AISI 52100 fit perfectly with them, as they have excellent magnetic properties and are "stainless." Keep in mind that normal stainless steel won't work because it's not magnetic. On one end, I've got a ring magnet measuring 10 X 3 mm with a countersunk hole of 3mm N50. This magnet is glued to the ball, ensuring there are no side forces on the magnetic coupling. I had to drill up the hole for the rod and included some clearance variables in the scad file that you can adjust if you don't want to drill. Printer Settings: * Printer: Kossel Mini * Supports: No * Resolution: 0.2mm * Infill: It doesn't matter, but I used 20% infill; it's surprisingly thin. Notes: If the magnets are tricky to insert, you can try dipping the part in hot water to soften it slightly. Just be sure not to heat up the magnets - at least consult their data sheet first and find out what temperature is safe for them. Normal N52 magnets lose their properties long before boiling point, so be cautious!