Product name:17HS3401 34mm Nema 17 Stepper Motor 42 Motor 42BYGH 1.3A 28N.cm 4-lead for 3D Printer CNC Laser Engraving Specification: Model:17HS3401 Phase:2 Step Angle:1.8 Motor Size:42 x 34mm Shaft:"D" shaft 21 x 5mm 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.:17HS3401 Step Angle( ):1.8 Motor Length(L)mm:34 Rated Current(A):1.3 Resistance/Phase():2.4 Inductance/Phase(mH):2.8 Holding Torque(N.cm):28 Detent Torque(N.cm):1.6 Inertia Of Rotor(G. cm):34 Lead(No.):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:100M Min, 500VDC Insultion Force:500VAC for a minute Features: 1. Low noise. 2. Low heat. 3. Smooth operation. 4. Good acceleration performance. Package Included: 1 X 17HS3401 Stepper Motor