Bit to motor shaft adapter
thingiverse
Adapter for electric screwdriver that allows you to connect engine shaft with different bit sizes. Fusion360 file contains 2 parameters that you can change to adjust it to your shaft and bit dimensions. It is a part of a 3D printed electric screwdriver project, more info can be found in here: https://www.thingiverse.com/thing:5583965 I didn't try to print it without supports, printing it starting with a bit hole at the first layer is better as it allows for easier support removal.
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