The Pololu 391:1 Metal Gearmotor 20Dx46L mm 6V CB with Extended Motor Shaft is a compact yet powerful brushed DC gearmotor. It combines a 6V brushed DC motor with long-life carbon brushes and a 390.6:1 metal spur gearbox. With a cylindrical shape of 20mm in diameter, it is designed to deliver high output for its size. The gearmotor features a D-shaped output shaft that is 4mm in diameter and extends 18mm from the face plate of the gearbox. Additionally, it also comes with a 6x2mm extended motor shaft.
The key specifications of this gearmotor are worth noting. It operates at 6V, delivering a no-load performance of 36 RPM and 150 mA. The stall extrapolation is 16 kg⋅cm (220 oz⋅in), with a current of 2.9 A. However, it's important to note that the gearbox torque limit is 70 oz-in (5 kg-cm), indicating the maximum torque the gearbox can handle.
This gearmotor is perfect for small robotics, automation projects and hobbyist applications where compactness, high torque and fine control are required. Its long-life carbon brushes ensure durability and longevity, reducing the need for frequent replacements.
The 391:1 Metal Gearmotor's extended motor shaft is a unique feature that sets it apart. This extended shaft can be used to mount additional components such as encoders or pulleys, providing more flexibility in design and application.
In summary, the Pololu 391:1 Metal Gearmotor 20Dx46L mm 6V CB with Extended Motor Shaft is a small, robust, and powerful gearmotor. It is designed to deliver high performance and versatility, making it an excellent choice for a wide range of applications.