Yet another Z Shaft Coupler for Prusa Mendel

by raldrich, published

Yet another Z Shaft Coupler for Prusa Mendel by raldrich Aug 21, 2011
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I bought motors that happened to have rather short shafts, and 2 flats cut at 90° to each other, and was having a lot of trouble getting the standard couplers to center and hang on to them, so I decided to design my own.

These use trapped nuts and grub screws to hang on to the shaft - one pushing the motor shaft into the flats on the motor shaft hole, and 3 holding the z axis screw.


Print, clean out the grub screw holes, insert M3 nuts into the traps (I had to epoxy them in, because apparently .5mm of slop is too much for my printer), and add M3 grubscrews.

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it would be perfect for me but my motor shaft has only one cut and i cant modify the .scad file to fit my needs.