Magnetic separation stand

by NonDisjunction, published

Magnetic separation stand by NonDisjunction Apr 23, 2013
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3060Views 439Downloads Found in Biology


Similar stands for protein purification from Promega and Millipore cost anywhere from $45-377 (for 8 position stands). That's ludicrous! It is plastic with a neodymium magnet inside. So I designed my own and printed it out in about 25 minutes (total cost around $2, including the rare earth magnet inside). The stand is sized to fit two 3/4" x 1/2" by 1/4" rectangular magnets, although the space should accommodate and work perfectly with other smaller/rounder rare earth magnets. It is also designed to be modular, in that the first prototype here fits together with tape, such that you can transform the two-position stand into a four-position stand by removing the tape.

I am happy to hear your comments, questions, and to see if anyone else can derive a better unit. I plan on quickly designing an 8-position unit sometime in the near future (per request, to replace the Millipore unit).


Print two of these babies, insert rare earth magnets, and tape 'em together.

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Nice start - -why not add a snap fit to put them together.

I would like to. My AutoDesk Inventor skills are not that refined. For this design, I would like a snap fit that doesn't interfere with the ability to join them as a four-position unit. Any thoughts? Please feel free to be iterative on this design, remix, repurpose, whathaveyou.

For something like this - I would strongly suggest taking a look at using OpenSCAD so that other users can then use the Customizer App as it wouldn't be that much work to make it parametric - so people could get the number of positions, magnet size, etc. for what they are doing. Check out http://www.thingiverse.com/thing:47491http://www.thingiverse.com/thi... as a good example.

Customizer Colorimeter/Nephelometer Case v0.1