Haydn’s MagBalls and MagBallArms for Delta/Kossel 3D Printers

Description Price US First Class
First Class postage
High-precision MagBalls 12 for $18 or
$1.50 each
$5 $14
CNC’d Delrin rod ends 12 for $15 $5 $14
N52 NdFeB magnets (each one tested) 12 for $24 or
$2 each
$5 $24
215mm set of arms: Mini-Kossel $75 $5 $24
288mm set of arms: Kossel w/<250mm bed $75 $5 $24
304mm set of arms: Kossel w/250mm bed $75 $5 $24
360mm set of arms: Kossel w/300mm bed $80 $5 $24
Custom length set of arms $115 $5-$15 varies

Contact haydn.huntley@gmail.com for MagBalls, magnets, and extremely carefully assembled, precisely measured carbon fiber arms.
I test and measure each set of arms. The magnets in the joints have a tested holding strength on a MagBall of at least 1.5kg. The arms in a set match lengths within 30µ, according to my calipers.

All sets of arms include MagBalls, N52 magnets and CNC’d Delrin ends.

Lubricant: I use bicycle chain lube. Stays in place, sheds dirt. My favorite is White Lightning Easy Lube

Here are typical measurements for the new high-precision MagBalls:

These new ball studs are about 10x as precise as the previous ones I was able to have made.

I don’t recommend the practice of unattended printing with any 3D printer, though that’s the way I usually print.