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 without Gearbox: 25Ncm(31.2oz.in) * Rated Current/phase: 0.4A * Phase Resistance: 27ohms * Inductance: 28.5mH+/-20%(1KHz) Gearbox Specifications: * Gearbox Type: Planetary * Gear Ratio: 5.18:1 * Efficiency: 90% * Backlash at No-load: <=3 deg. * Max.Permissible Torque: 3Nm(424.83oz.in) * Moment Permissible Torque: 5Nm(708.06oz.in)* Shaft Maximum Axial Load: 50N * Shaft Maximum Radial Load: 100N 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.
