20:1 High Precision Planetary Gearbox Nema 17 Geared Stepper Motor 1.68A Gear Ratio for 3D Printers XYZ Axis or CNC Machine

This Nema 17 stepper motor with 39mm body and 1.68A rated current, integrated with a 48.3mm Planetary gearbox of 20:1 gear ratio. It's a good solution to applications that with special space but need low speed and/or high torque.

Electrical Specification

*Manufacturer Part Number: 17HS15-1684S-HG20
*Motor Type: Bipolar Stepper
*Step Angle: 0.09deg
*Holding Torque without Gearbox: 39Ncm(55oz.in)
*Rated Current/phase: 1.68A
*Phase Resistance: 1.6ohms
*Voltage: 2.7V
*Inductance: 3.2mH ± 20%(1KHz)

Gearbox Specifications

*Gearbox Type: Planetary
*Gear Ratio: 20 : 1
*Efficiency: 75%
*Backlash at No-load: 1.6°
*Max. Permissible Torque: 10Nm
*Moment Permissible Torque: 15Nm
*Max. Radial Load: 100N
*Ambient Temperature: -10 - 90℃
*Insulation Class: B
*Noise: <=50 dB
*Life: 20000 h

Physical Specifications

*Frame Size: 42 x 42mm
*Motor Length: 39mm
*Gearbox Length: 48.3mm
*Shaft Diameter: 8mm
*Shaft Length: 23.5mm
*Key-way Length: 14mm
*Number of Leads: 4
*Lead Length: 320mm
*Weight: 880g

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.