Pololu
50:1 Micro Metal Gearmotor HPCB 12V
The 50:1 Micro Metal Gearmotor HPCB 12V is a compact brushed DC gearmotor from Pololu's popular micro metal gearmotor family. This high-power carbon brush (H...
The 50:1 Micro Metal Gearmotor HPCB 12V is a compact brushed DC gearmotor from Pololu's popular micro metal gearmotor family. This high-power carbon brush (HPCB) variant operates at 12V and draws half the current of its 6V equivalent for the same performance, making it better suited to 12V systems and battery configurations.
The carbon brush design provides significantly longer motor life compared to precious metal brush versions, making it suitable for projects that require extended or continuous operation. The 50:1 gear ratio provides a good balance of speed (650 RPM) and torque (0.67 kg·cm stall) for small robot drives and mechanisms.
Key Features
- 50:1 Gear Ratio – Balanced speed and torque for versatile applications
- 12V HPCB Motor – High-power carbon brushes for extended motor life
- Half the Current – Same performance as the 6V version at half the current draw
- 3mm D-Shaft Output – 9mm long, compatible with Pololu wheels and hubs
- Compact Form Factor – 10 × 12mm gearbox cross-section
Specifications
- Gear Ratio: 50:1
- Rated Voltage: 12V
- Free-Run Speed: 650 RPM
- Free-Run Current: 80mA
- Stall Torque: 0.67 kg·cm (9.3 oz·in)
- Stall Current: 0.75A
- Max Power Output: 1.1W
- Output Shaft: 3mm diameter D-shaped, 9mm long
- Gearbox Cross-Section: 10 × 12mm
- Brush Type: Carbon (long-life)
Ideal For
- Small robot drives and chassis
- Mechanisms requiring moderate speed and torque
- 12V battery-powered mobile projects
- Applications needing extended motor life (carbon brushes)
Package Contents
- 1× 50:1 Micro Metal Gearmotor HPCB 12V
Jargon buster
Plain-language definitions for the technical terms used above.
- kg·cm
- A torque unit often used for hobby servos, meaning how many kilograms of force the servo can hold at a 1 cm arm length. A higher kg·cm rating means the servo can move or hold heavier loads, but power supply current needs may also increase.
- Stall torque
- The maximum twisting force a servo can produce when its output is held still and cannot move. It helps you judge whether the servo is strong enough for a robot joint, steering linkage, or other load.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
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Robotics & Motion
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