Pololu
25:1 Metal Gearmotor 20Dx41L mm 6V CB with Extended Motor Shaft
A compact 6V brushed DC gearmotor with long-life carbon brushes and a 25:1 metal spur gearbox. This version includes an extended 6 × 2mm motor shaft at the r...
A compact 6V brushed DC gearmotor with long-life carbon brushes and a 25:1 metal spur gearbox. This version includes an extended 6 × 2mm motor shaft at the rear, useful for attaching encoder wheels or other feedback mechanisms.
The cylindrical body has a 20mm diameter, and the D-shaped output shaft is 4mm in diameter extending 18mm from the gearbox face plate.
Key Features
- 25:1 Metal Gearbox – Durable metal spur gears for reliable operation
- Carbon Brushes – Long-life brushes for extended motor lifespan
- Extended Motor Shaft – 6 × 2mm rear shaft for encoder wheel attachment
- Compact Form Factor – 20mm diameter cylindrical body
- D-Shaped Output Shaft – 4mm diameter, 18mm extension
Specifications
- Voltage: 6V
- Gear Ratio: 25:1
- No-Load Speed: 570 RPM
- No-Load Current: 150mA
- Stall Torque: 1.6 kg·cm (22 oz·in)
- Stall Current: 2.9A
- Diameter: 20mm
- Output Shaft: 4mm D-shaped, 18mm long
- Extended Motor Shaft: 6 × 2mm
Ideal For
- Small robotics platforms with encoder feedback
- Motorised mechanisms requiring long motor life
- Mobile robot drive systems
- Compact motion control projects
Package Contents
- 1× 25:1 Metal Gearmotor 20Dx41L mm 6V CB with Extended Motor Shaft
Jargon buster
Plain-language definitions for the technical terms used above.
- encoder
- A device attached to a motor or shaft that reports movement, such as rotation steps or position. In a pump system, an encoder can help measure or control how much the motor has turned, which affects how repeatable the watering amount can be.
- 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.
- 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.
Find this product in
Robotics & Motion
Related Tutorials
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