Prusa i3 lead screw adaptor
thingiverse
This is an adapter that enables you to utilize standard brass leadscrew nuts, with X-axis ends designed for the leadscrew nuts supplied with Prusa i3s (which have a larger BCD). You will lose approximately 8mm from your Z build height if using a standard Prusa i3 design. This is for the right-hand leadscrew - print a mirror image for the left. Thread the two small holes for M3, then secure the adapter to the X-axis end using M3 bolts through the recessed holes. Finally, secure the brass nut to the adapter using M3x10s. Tested on my own MK3 clone - if anyone else uses them on other printers, please let me know and I'll create a compatibility list.
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