This is a Shaft-Reversed stepper motor, which is often used in CNC machines and 3D printers.

The advantages of stepper motors include low cost, high reliability, high torque at low speeds, and simple, robust construction that works in almost any environment. They are typically controlled digitally as part of an open-loop system for use in positioning or holding applications.

This is a Nema 17 stepper motor with a face plate size of 1.7 x 1.7 inches (43.2 x 43.2 millimeters). The Nema 17 is larger and generally heavier than a Nema 14, but this also means it has more potential for higher torque. However, its size does not indicate its power.

Technical Specifications:

• 2 Phases
• Step Angle: 1.8±5% degrees/phase
• Voltage: 4.2V DC
• Current: 1.2A/phase
• Resistance: 8.8±10% Ω/phase
• Inductance: 6.0mH±20 % (1kHz 1V rms)
• Lead Style: AWG26 UL1007
• Comes with a 70cm 4-Lead cable
• Holding Torque: 40N.cm Min
• Detent Torque: 2.6N.cm Max
• Insulation Resistance: 100MΩ Min (DC 500V)
• Insulation Class: B (130°C)
• Rotor Inertia: 57g.cm²
• Cable Length: 70cm