Prym maxi/Sentro knitting machine drill adapter

UPDATE: I made the bit thicker so it won't brake. 

FULLY 3d printable

A adapter for a drill to use on a Prym Maxi or Sentro circular knitting machine to automatically turn the knob. This way you can knit faster without putting too much strain on your wrist. 

Just slide te two pieces together, pop in the pin and screw the nut tight. I made it so that the pin is printed vertically to make it stronger. Print the pin and nut at 100% infill and the other part with 4 walls and your good. The print profile is set like this.