Hand crank motorizer

This couples an inexpensive power screwdriver to a hand cranked gadget.
In this specific case, it turns a hand cranked yarn ball winder into an electric yarn ball winder.

It took a few drafts to get it right.

Modeled in OpenSCAD, so the model is a simple text file you can edit to suit your hand crank.

The steel shank is a flat head screwdriver bit left over from another drill set,

Print instructions

Category: Hobby Print Settings

Printer: Monoprice Mini select

Rafts: Yes

Supports: Yes

Resolution: .1mm

Infill: 100%

Notes:

I printed this in PLA at 190°.

It's printed at right angles to the orientation you'd expect to get the strongest grain. (When I tried printing this with the cone pointing up, it twisted apart in under a minute.)

Post-Printing

super glue in the screw driver bit.

With the print in its printed orientation, the screwdriver bit fits in so the blade is vertical.

Custom Section

The tool in action.