spice grinder core 3d model

A functional vertical multi-stage spice grinder core, optimized for Bambu Lab A1 Mini (max height 120mm, outer diameter 55mm). The body prints as a single monolithic unit featuring an integrated central rotating shaft, top twist handle, and multiple internal stacked crushing levels with alternating fixed/rotating teeth and gravity-feed holes. Both top and bottom connection ends feature standardized male/female screw interfaces designed with a counter-threaded (reverse-threaded) pitch relative to the handle rotation direction to prevent loosening during operation. Optimized for PETG 3D printing.