STEPPERONLINE 51:1 Planetary Gearbox Nema 17 Gear Stepper Motor Bipolar L=48mm for CNC DIY Router

• High torque and low speed
• 0.035 deg. Step Angle
• NEMA 17 Bipolar 4 Wire
• 50.9:1 Planetary Gearbox Ratio
• Rated current 1.68A and resistance 1.65ohms

This high precision NEMA 17 stepper motor has a built-in planetary gearbox with a speed ratio of 50.9:1, the resolution reaches 0.035 deg. step angle. It is a good solution in applications that require very low rotational speeds and/or a lot of torque. Electrical Specifications: * Manufacturer part number: 17HS19-1684S-PG51 * Motor type: bipolar stepper * Step angle: 0.035 deg. * Holding torque: 4Nm * Rated Current/Phase: 1.68A * Phase Resistance: 1.65ohms * Inductance: 2.8mH+/-20% (1KHz) Gearbox Features * Gearbox Type: Planetary * Gear Ratio: 50.9:1 * Efficiency: 73% * Backlash to No-load: <=1 deg. * Maximum permissible torque: 4Nm(6000g) * Allowable Torque: 6 Nm(950 oz) * Maximum shaft axial load: 50N * Maximum shaft radial load: 100N Physical characteristics: * Frame size: 42 x 42 mm * Motor length: 48 mm * Gearbox length: 42.7 mm * Shaft diameter: 8 mm * Shaft length: 20 mm * D Cut Length: 15mm * Number of tracks: 4 * Lead length: 500 mm * Weight: 620g Connection: Black(A+), Green(A-), Red(B+), Blue(B-) WARNING: Make sure the motor connects to a constant current drive controller or chopper before testing the motor. Connecting the motor directly to a power supply will destroy the motor.