Parametric magnetic quick release keychain

A simple parametric magnetic quick release keychain, which can be easily customized to fit your magnet sizes.
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updated August 24, 2024

Description

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A simple parametric magnetic quick release keychain.

I made this some time ago to use with archery arrow puller and it's working great.

 

You can change diameter and thickness of top and bottom magnets, if you do not have 8x3mm or 6x2mm sizes.

You can even use mismatched magnets (if you need to do so), and the file should compensate for the differences.

There are few more parameters that can be changed (all have descriptions), like clearanceOffset for tolerances (0.2mm by default).

 

It can be printed with brim and no supports in the orientation it's in, if you have a good layer adhesion, or you can rotate it and use some supports.

This design was chosen specifically to be usable with smaller key rings even when using larger magnet sizes.

 

Layer height should be 0.16mm or less.

 

 

Changelog:

v10

  • fixed issue with fillet on the top part that I broke just before publishing the file (it worked fine only for specific magnet sizes)
  • I have removed the v9.f3d file to avoid confusion

v13

  • changed ringHoleSafeZone to correctly adjust how much material is added between ring holes and magnets

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The author marked this model as their own original creation.

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