Carbide Burrs Gridfinity Holder (1/4" shank)

This is a follow on to the Gridfinity holder I made for my IR307B die grinder, to hold the bits.  I've gone through several different versions of this before getting something I am relatively happy with.  This could have been more compact by arranging the burrs vertically, but I wanted it to fit in a lower drawer.  So I made it in 2x2 squares, and placed them at an angle.  Then I added a space for an additional burr horizontally which can accommodate a relatively large burr.

Like my other Gridfinity models, the base is altered to accept 6x3 magnets as a press fit, with the upper surface of the magnet holes modified to make the slicer bridge across correctly for a clean result.  Due to the size of this model, I have included sacrificial “mouse ears” in the CAD to give the ends more surface area to help prevent them warping off the bed.  These will need to be removed after printing.

The unit pictured was printed out of Overture PLA on my bear upgraded Mk3S+, using a 0.6mm nozzle, at 0.3mm layer height.