The Stepper Motor 3.71:1-139:1 Ratio NEMA17 42BYG, with a compact and durable 60mm body length, is an ideal choice for precise and efficient movement control. This motor boasts a 48MM gearbox, providing a ratio of 27 to 1 for an unmatched level of speed and power. The high-quality construction ensures reliable performance, even under heavy loads or in high-pressure applications. Its 40mm diameter and 42BYG series name indicate that it is designed for industrial and commercial use. The 139:1 ratio ratio is ideal for stepping, providing precise control over the motor's position and speed. This Stepper Motor is a game-changer in motion control, making it an essential addition to any workshop, factory, or industrial facility.