Ball screw linear stepper motor
NEMA17 48mm two phase bipolar stepper motor
Rated current: 1.68A, 1.8 step angle
Rolled 1204 ball screw
Material: Gcr15, Ball Screw Nut included
According to RobotDigg's conclusion that ball screw linear stepper is Not good for Z-axis but much higher efficiency and precision for XY axis.