Model No. Step Angle Motor Length Rated  Current Resistance /Phase Inductance /Phase Holding Torque Couple Relaxing Inertia Of Rotor   Lead  ( °) (L)mm (A) (Ω) (mH) (N.cm)  (N.cm)  (G. cm²) (No.) 17HS4401 1.838 1.52.43.7 4015 54 4