This allows a cordless screwdriver to power an OXO pepper mill. The OXO mill is great, but when I have to grind a lot of pepper it gets tiring. Some rub recipes call for 45 mL of coarse ground pepper, which wears me out. This lets me drive it with my cordless screwdriver. If I had to grind a lot of pepper every day I would get a proper battery powered grinder, but this is good for occasional use.
The cap fits over the bottom of the mill, and has features on the inside that engage with the finger grips on the mill. The top is a ¼ inch (6.35 mm) hex drive that fits a generic cordless screwdriver that works with ¼ inch hex bits.
I had to set a minimum layer time of 30 seconds in my slicer to allow the hex enough time to cool down. Without that setting it turned into misshapen mush. I included a test part that you can use to calibrate your settings, and to verify that it fits your cordless drill.
See the photo, but actually you have to hold onto the glass, to keep it from turning while the motor turns the base.
Revision: I made a version for a ¼ inch square drive because printing that hexagonal shaft is an uncertain affair. The alternate version uses a Hex Shank Socket Driver, such as a Harbor Freight 68513 or a DeWalt DW2224, between the cordless screwdriver and the cap. In the original version I figured if there was too much torque the hex shaft would just break off, but that certainly won't happen with this one. Because of that I made an alternate version with some slots in the drive ring to add some flexibility, so maybe the driver will slip before breaking something else. No guarantees, of course, choose your adventure.
The author marked this model as their own original creation.