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Finger Hex Wrench - 4mm and 1/4-inch
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Finger hex wrench for screwdriver bits with two shank sizes -- 4mm and 1/4-inch. Low profile and a fast and easy print.
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- 5 / 5
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- 57
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- 273
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- 5
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- 965
- Oceny
- 4
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Remix of the very cool "Finger Hex Wrench" by RonaldWalters at https://www.thingiverse.com/thing:3985566
I wanted to challenge myself and do a complete from-the-ground up redesign (reimplementation?) of the original finger wrench in OpenSCAD.
Here are some changes and improvements I made:
- Still has 1/4-inch hex version
- Addition of a 4mm hex version for compatibility with iFixit style mini-bits
- Changed the magnet to a larger 10mm diameter by 1.8mm thick rare-earth magnet. This magnet is able to hold the finger wrench to a magnetic surface (even upside-down!) and also holds the bit in the wrench.
- The magnet now mounts on the underside. I recommend using supports for the magnet cavity.
- Removal of all fillets and replaced with chamfers, which makes the underside print cleanly with no support (apart from inside the magnet cavity).
- Full source code included (SCAD and SVG)
- 4mm hex-bore is oversized by 0.46mm to compensate for well known issue with 3d printers undersizing holes
- 10mm magnet hole size is oversized by 0.4mm
See the source code for an equation developed by Joshua Kuhn in his 2015 Master's thesis relating to oversizing the 3d-model holes to get accurate holes in 3D prints: