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96 well plate / 0.2 mL strip tube Magnet Rack

by acadey, published

96 well plate / 0.2 mL strip tube Magnet Rack by acadey Apr 24, 2013

Description

This is a magnet holder for magnetic bead separation for either a 96 well plate - or a 96 well plate with the wells cut out can be taped on top to hold 8 tube strips. Here are the magnets: http://www.kjmagnetics.com/proddetail.asp?prod=BZ082. I added a struts design that can be printed and used to hold the tops of the magnets in place while the epoxy sets. Make sure they are not in contact with the epoxy while it sets! I also added a version that holds the magnets a little more snugly that helps with setting the magnets.

NOTE: The first prototypes pull beads ~25-30% slower than commercial versions - also they require more care when removing the super. This I believe is due to the depth of the magnets and I am working up a new model that uses different sized magnets that may work better.

Also if you are a grad student and are trying to convince your PI to buy a 3D printer - making just two of these will pay for the printer. These things are ridiculously overpriced.

UPDATE: Added a version for smaller square magnets. Will add more details soon, but hopefully this will allow the beads to be pulled higher on the tube. Also the magnets are a pain to glue in place - I am going to try a much faster drying glue and hopefully that will work...

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Added a new version for smaller, square magnets that may help pull beads higher up on the tube wall. Still in development, so any feedback is appreciated. I will hopefully have some results soon, but it is jammed into the middle of a long to-do list...
Thank you !!!
There actually is no top part. It is designed to hold entire 96-well plates. If you want the top part with the holes, the best way is to take a skirted 96-well plate (where there is a hard shell and the tubes are of different, clear plastic - I have a link to an image below) and just cut the tubes out by running a razor over the top (carefully - its easy to cut yourself since the blade can get stuck).

Image: ecx.images-amazon.com/images/I/41C7%2BO3kXCL._SL500_AA300_.jpg

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Added a new version for smaller, square magnets that may help pull beads higher up on the tube wall. Still in development, so any feedback is appreciated. I will hopefully have some results soon, but it is jammed into the middle of a long to-do list...
Hi, I am looking into building this rack but I can not find the file with the top part that has the holes. Am I doing something wrong?
There actually is no top part. It is designed to hold entire 96-well plates. If you want the top part with the holes, the best way is to take a skirted 96-well plate (where there is a hard shell and the tubes are of different, clear plastic - I have a link to an image below) and just cut the tubes out by running a razor over the top (carefully - its easy to cut yourself since the blade can get stuck).

Image: ecx.images-amazon.com/images/I/41C7%2BO3kXCL._SL500_AA300_.jpg
Thank you !!!
Has there been another version made with different magnets?
acadey - in reply to 1234
I have one designed, but have not yet had the time to print and test it. Hopefully int he next month though.
This is amazing work!
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