Wiha Precision Handle for Your Tools

Alright, something for your toolbox.

First, I would like to say that I'm in love with my Wiha precision screwdrivers. They are elegant, they are awesome, they are tough as nails, and thanks to the rotating cap on the end, you have a very precise single-handed control.

Here are some of the features I wanted from the precision handle:

1. Freely-spinning cap on top of the handle so you can push the cap against your palm and use your fingers to twist the handle freely.
2. The handle and cap must be printed separately. I want to use different color caps to color code my tools.
3. The cap is press-fitted to the handle; no fasteners are needed.
4. You can (lightly) hammer the top of the handle. Yes, it is a precision handle, I know. Still, I want to be able to hit it! Emphasis on “lightly”.
5. Wiha looks ;-)

The handle is designed in OpenSCAD for an extrusion width of 0.5 mm and a layer height of 0.2 mm. 

This is a very thin and tall model, so it is crucial not to have gaps between shells. If you plan on using different slicer settings, I recommend regenerating the handle with your values from the SCAD file.

Since you will be press-fitting your tools into the handle, use some tough filament (I used quality PETG) and print about 5C hotter than usual to give it more strength. I would also recommend cleaning the hole with a drill bit before press-fitting.

I was printing my handles with something like this: 250C, 6 top & bottom layers, 4 shells, 50% infill, allow single extrusion fill, and print at 30mm/sec. Go sloooooow if you want a nice-looking handles!

I used a vise with two blocks of pine as jaws to squeeze the needle file without marring it, and then I hammered the handle on the tool using a wooden mallet.

As an example, I used the handles on a set of diamond files.