Star Knob

Accepts a standard 1/4 20 hex bolt. I sized the hex insert to be fairly tight for the bolts purchased at Home Depot. I had some other bolts that didn't fit but you could apply a very slight scale to the print if you needed a slightly larger opening.

I opted to print these solid as I wasn't confident about how much torque I could use with some percentage of infill.

Print Settings

Printer Brand:

Creality

Printer:

Ender 3

Rafts:

No

Supports:

Yes

Filament:Overture PETG Black