391:1 Metal Gearmotor 20Dx46L mm 12V CB

Pololu's compact brushed DC gearmotors pack a powerful punch for their size. This particular model features a 12V brushed DC motor with durable carbon brushes and a 390.6:1 metal spur gearbox. The cylindrical gearmotor has a diameter of 20mm, while the D-shaped output shaft has a diameter of 4mm and extends 18mm from the gearbox's faceplate.

Key specifications of the product include a 12V voltage, 36 RPM no-load performance with 80 mA, and a stall extrapolation of 21 kg⋅cm (290 oz⋅in) with 1.6 A. However, please note that the gearbox torque limit is 70 oz-in (5 kg-cm), which is a critical detail to consider when evaluating product limitations.

These gearmotors are perfect for a variety of applications. They can be used in robotics for precise movement control, in automotive applications for power window and seat adjustment mechanisms, or in any project where compact size and high torque are required. Thanks to the long-life carbon brushes, you can expect a long service life, reducing the need for frequent replacements and thereby saving time and money in the long run.

One of the unique properties of this gearmotor is its high torque-to-size ratio. Despite its small size, it can generate a significant amount of power. This makes it an excellent choice for projects where space is at a premium but power cannot be compromised. Furthermore, the metal spur gearbox provides robustness and durability, ensuring the gearmotor can withstand demanding conditions.