Product name：17HS4401-S 40mm Nema 17 Stepper Motor 42 Motor 42BYGH 1.7A 40N.cm 4-lead Motor for 3D printer CNC Laser Engraving Machine Specification: Model:17HS4401-S Phase:2 Step Angle:1.8° Motor Size:42 x 40mm Shaft:"D" shaft 22 x Ф5mm Outlet way:"4" plug line Motor leads:Dupont line(1M) Adapter drive:Two-phase step drive Scope: 3D Printers, Monitor Equipment, Medical Machinery, Textile Machinery, Packaging Machinery, Stage Lighting, Laser engraving, Automation Equipment, Non-standard Equipment, Placement machine ect. Electrical Specifications: Model No.:17HS4401-S Step Angle( °):1.8 Motor Length(L)mm:40 Rated Current (A):1.7 Resistance/Phase(Ω):1.5 Inductance/Phase(mH):2.8 Holding Torque(N.cm):40 Detent Torque(N.cm):2.2 Inertia Of Rotor(G. cm²):54 Lead( °):4 General Specification: Precision angle step:±5% (full step, no charge) Resistance accuracy:±10% Precision inductance:±20% Temperature rise:80deg Max (rated current, 2 phase on) Ambient temperature:( - 20°)-(+ 50°) Insulation resistance:100MΩ Min, 500VDC Insultion Force:500VAC for a minute Features: 1. Low noise. 2. Low heat. 3. Smooth operation. 4. Good acceleration performance. 5. Black surface treatment. Package Included: 1 X 17HS4401-S Stepper Motor