This is high precision bipolar Nema 17 stepper motor with 0.9° step angle (400 steps/revolution). Each phase draws current 1.2A, allowing for a holding torque of 11Ncm(15.6oz.in).

Electrical Specification

* Manufacturer Part Number: 17HM08-1204S
* Motor Type: Bipolar Stepper
* Step Angle: 0.9°
* Holding Torque: 11Ncm(15.6oz.in)
* Rated Current/phase: 1.2A
* Phase Resistance: 3.0ohms
* Recommended Voltage: 12-24V
* Inductance : 2.2mH±20%(1KHz)

Physical Specification
* Frame Size: 42 x 42mm
* Body Length: 21mm
* Shaft Diameter: Φ5mm
* Shaft Length: 17mm
* Number of Leads: 4
* Lead Length: 300mm
* Weight : 150g

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.