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- 4 lead nema17 stepper motor 42 motor nema 17hs4401s pg518 extruder gear stepper motor ratio 5 18 1 planetary gearbox for cnc
4 lead nema17 stepper motor 42 motor nema 17hs4401s pg518 extruder gear stepper motor ratio 5 18 1 planetary gearbox for cnc