Nema 23 57 x 57 closed loop stepper motor with encoder at affordable price, 5.2 amp, 2 phase 4 wire for 3D printer, robot arm, CNC machine, sewing machine and other electrical equipment. Hybrid stepper motor with 1.8 degree step angle, 102mm motor length, 8mm shaft, holding torque at 2.2N·m, lightweight and high torque. SKU: ATO-STEP-23C520.