STEPPERONLINE 27:1 Planetary Gearbox High Torque Nema 17 Stepper Motor 3D Printer DIY Camera

This high precision NEMA 17 Stepper motor has an integrated Planetary gearbox with a 26.85:1 gear ratio, the resolution reach 0.067 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: 17HS19-1684S-PG27 * Motor Type: Bipolar Stepper * Step Angle: 0.067 deg.* Holding Torque: 3Nm * Rated Current/phase: 1.68A * Phase Resistance: 1.65ohms * Inductance: 2.8mH+/-20%(1KHz) Gearbox Specifications: * Gearbox Type: Planetary * Gear Ratio: 26.85:1 * Efficiency: 81% * Backlash at No-load:<=1 deg.* Max.Permissible Torque: 3Nm(425oz-in) * Moment Permissible Torque: 5Nm(708oz-in) * Shaft Maximum Axial Load: 50N * Shaft Maximum Radial Load: 100N Physical Specifications: * Frame Size: 42 x 42mm * Motor Length: 48mm * Gearbox Length: 35mm * Shaft Diameter: 8mm * Shaft Length: 20mm * D-cut Length: 15mm * Number of Leads: 4 * Lead Length: 500mm * Weight: 570g 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.'