Nema 23 Extruder mounting converter

thingiverse

This is a plate to convert a Nema 23 mount to a Nema 17 plate. It allows you to mount a cheap chinese metal extruder meant for a Nema 17 onto a Nema 23. You have to drill out the extruder gear with a 6mm drill (and wiggle it, the shaft is actually 6.35) but if you have a spring loaded extruder it doesn't matter if it is a little eccentric. The Nema 23 has huge torque compared to a Nema 17, typically Nema 17 have 10 - 50 Ncm torque (0.1Nm - 0.5Nm) whereas a Nema 23 is measured in whole Nm usually between 1Nm - 5Nm (100Ncm - 500Ncm) so basically 10 times as much power (yay!) I would be telling a lie if I said I never had motor slip now, but it only happens if I do something stupid (usually too thin a first layer as I cram it into the plate to get adhesion!) but otherwise? No, never :) anyway, I "only" have 1.26Nm motor from ebay that cost £16.50! The mounts to the Nema 23 are M5, the mounts to the Nema 17 are M3. I found I had to turn the nuts and bolts upside-down (e.g. bolts push through from bottom) Instructions I printed it 50% fill as I am mean, probably should be 100%