"This dual shaft Nema 23 stepper motor with 1.8 deg. step angle (200 steps/revolution).
It with 8 wires, which you can give three connection options: Unipolar or Bipolar(Serial) or Bipolar(Parallel), you can choose any type as you wish.
A rear shaft can mount encoder, hand wheel or equals.

Electrical Specification:

* Manufacturer Part Number: 23HS33-4008D
* Motor Type: Unipolar/Bipolar
* Step Angle: 1.8 deg.
* Holding Torque(Bipolar): 2.83Nm(400oz.in)
* Holding Torque(Unipolar): 2.0Nm(283oz.in)
* Rated Current(Bipolar Serial): 2.83A
* Rated Current(Bipolar Parallel): 5.66A
* Rated Current(Unipolar): 4.0A
* Phase Resistance(Bipolar Serial): 1.6ohms
* Phase Resistance(Bipolar Parallel): 0.4ohms
* Phase Resistance(Unipolar): 0.8ohms
* Inductance(Bipolar Serial): 7.2mH+/-20%(1KHz)
* Inductance(Bipolar Parallel): 1.8mH+/-20%(1KHz)
* Inductance(Unipolar): 1.8mH+/-20%(1KHz)

Physical Specification:

* Frame Size: 57 x 57mm
* Body Length: 84mm
* Shaft Diameter: 6.35mm
* Front Shaft Length: 21mm
* D-cut Length: 15mm
* Rear Shaft Length: 15mm
* Number of Leads: 8
* Lead Length: 300mm
* Weight: 1.3kg

Connection:

BLK(A+), WHT(A-), BRN(C-), ORG(C+), RED(B), PUE(B-), BLU(D-), YEL(D+)

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. "