This bipolar stepper motor with planet gear box (gear ratio: 5.18) uses a standard 8mm-diameter D type output shaft, and has a 1.8° step angle (200 steps/revolution).
Each phase draws 1.0 A at 3.4 V, allowing for a holding torque of 18kg-cm (176N-cm) (200rpm).
The motor has a body dimension of 42mm square and 40mm in length, while the planet gear box is 36mm in diameter and 27mm in length.
The motor has four color-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. It can be easily mounted with 4 M3 threaded holes and can be controlled with the Dual Bipolar Stepper Motor Shield for Arduino (DRV8825).

Applications:

• Printer
• 3D Printer
• CNC
• Robotics
• Linear Actuators

Specifications:

• Model No: 42BYGH40-18-22A-C5.18
• Step Angle (degrees) :1.8
• 2 Phase
• Voltage: 3.4V
• Current: 1.0A
• Resistance: 1.7±10% Ohm/Phase
• Inductance: 4.3±20% mH/Phase
• Holding Torque: 3600 g.cm
• Detent Torque: 400 g.cm
• Insulation Class: B
• Life: 6000 hours
• Gear Ratio: 5.18:1
• Hold Torque with Gearbox: 18kg·cm (176N·cm) (200rpm)
• Dimension: 42×42×40mm(1.65×1.65×1.57″)
• Mounting: 4 x M3