This Nema 17 stepper motor with size 42x42x34mm
It has4 wires, each phase draws 1.3A, with holding torque 280mN.m
This is the most popular Nema 17 model. It with 1.8 deg. step angle (200 steps/revolution). Each phase draws current 1.3A at 12V-24V,allowing for a holding torque of 28Ncm.
Warning: Make sure the motor connect to a constant current or chopper drive controller before you test motor. Connecting the motor directly to a power supply will destroy the motor.