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Parametric hex drive bit (5.5mm - 1/4" provided for IBM model M) — image 1
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Parametric hex drive bit (5.5mm - 1/4" provided for IBM model M)

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Parametric bit for hex bolts. Useful for the rare occasions where you meet an unusual size. FreeCAD file provided

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Model information

Category
Tools
License
Creative Commons — Public Domain

I needed a 5.5 mm bit to disassemble my IBM model M keyboard.
It is not a very common size and usually you do not get in sets.

I'm providing the FreeCAD file so that you can customize it for you needs.
Open the file, tweak the parameters in the spreadsheet, select the main object and export from the menu. 

Do not expect it to withstand too much torque but in a pinch it might do the job

 

For IBM model M enthusiasts:
consider printing it with a longer shaft otherwise you might have some difficulties reaching some of the screws

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