This high precision NEMA 14 Stepper motor has an integrated Planetary gearbox with a 50.9:1 gear ratio, the resolution reach 0.035 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: 14HS13-0804S-PG51
* Motor Type: Bipolar Stepper
* Step Angle: 0.094 deg.
* Holding Torque: 4Nm
* Rated Current/phase: 0.8A
* Phase Resistance: 6.8ohms
* Inductance: 10mH+/-20%(1KHz)

Gearbox Specifications:
* Gearbox Type: Planetary
* Gear Ratio: 50.9:1
* Gear Efficiency: 73%
* Backlash at No-load: * Max.Permissible Torque: 4Nm(566oz-in)
* Moment Permissible Torque: 6Nm(850oz-in)
* Shaft Maximum Axial Load: 50N
* Shaft Maximum Radial Load: 100N

Physical Specifications:
* Frame Size: 35 x 35mm
* Motor Length: 34mm
* Gearbox Length: 43.6mm
* Shaft Diameter: 6mm
* Shaft Length: 18mm
* D-cut Length: 12mm
* Number of Leads: 4
* Lead Length: 500mm
* Weight: 360g

Connection:

Red(A+), Green(A-), Yellow(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.