Description: 48mm Nema 17 Stepper Motor 42 Motor 1.8A 52N.cm 4-lead for CNC 3D Printer.  Certification:CE, ROSH, ISO, FCC.    Specification: Phase:2;  Step Angle:1.8°;  Motor Size:42 x 48mm ;  Shaft:"D" shaft 21 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.    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.    Package Included: 1 X Stepper Motor;  1 X 1M Dupont Line