This is a dual shaft bipolar 269 oz-in Nema 23 Stepper Motor, suitable for smaller Mills and lathes such as the Taig and Sherline machines.
Model Number: 23H276-28-4B
Specifications
Size: Nema 23 (Size 57)
Phase: 2 Phase
Step Angle: 1.8 Degrees
Voltage: 70V Max
Current: 2.8A
Resistance: 1.2ohm
Inductance: 4.7mH
Holding Torque: 269 Oz-in
Dual Shaft
Bipolar 4 Wire
Physical Dimensions
Shaft: 6.35mm (1/4")
Length: 76mm
Height: 57mm
Width: 57mm
Wiring
Black > A+
Green > A-
Red > B+
Blue > B-