5:1 Planetary Gearbox Nema 17 Stepper Motor 0.4A for DIY CNC Robot 3D Printer

This is a short geared NEMA 17 Stepper motor, total length inlcuding shaft below 80mm, and with 6mm diameter shaft. It has an integrated planetary gearbox with a 5.18:1 gear ratio, the resolution reach 0.35 deg. step angle. It's a good solution in applications that need very low rotation speeds and/or lots of torque. Electrical Specification: * Manufacturer Part Number: 17HS13-0404S-PG5 * Motor Type: Bipolar Stepper * Step Angle: 0.35 deg. * Holding Torque: 121.2Ncm * Rated Current/phase: 0.4A * Phase Resistance: 30ohms * Inductance: 34mH+/-20%(1KHz) Gearbox Specifications: * Gearbox Type: Planetary * Gear Ratio: 5.18:1 * Efficiency: 90% * Backlash at No-load: Physical Specifications: * Frame Size: 42 x 42mm * Motor Length: 34mm * Gearbox Length: 27.3mm * Shaft Diameter: 6mm * Shaft Length: 18mm * D-cut Length: 12mm * Number of Leads: 4 * Lead Length: 500mm * Weight: 380g Connection: Black(A+), Green(A-), Red(B+), Blue(B-) 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.