Iverntech Nema 23 Stepper Motor 57x56mm Body 1.8 Stepper Angle 2.0A 2 Phase 4-Lead with 80cm Cable for 3D Printer, CNC Machine and Robotics: Amazon.com: Tools & Home Improvement
NEMA 23 High Torque Stepper Motor, 1.8°, 4 or 8 Wires
Nema 23 Stepper Motor Bipolar, 1.8 degree, 3A, 2 phase 4 wires | ATO.com
Stepper motor not rotating, just sounds like it is going back and fourth - Motors, Mechanics, Power and CNC - Arduino Forum
NEMA 23 Stepper Motor Pinout, features and example with Arduino