Pololu
47:1 Metal Gearmotor 25Dx52L mm HP 12V
A high-power 12V brushed DC gearmotor from Pololu's 25D mm metal gearmotor range. The 46.85:1 metal spur gearbox delivers 220 RPM no-load speed with up to 15...
A high-power 12V brushed DC gearmotor from Pololu's 25D mm metal gearmotor range. The 46.85:1 metal spur gearbox delivers 220 RPM no-load speed with up to 15 kg·cm of stall torque, making it well suited for robotics drive systems and mechanisms requiring moderate speed with strong torque.
The cylindrical form factor (just under 25 mm diameter) and 4 mm D-shaped output shaft allow easy mounting with standard Pololu 25D brackets and hubs. The output shaft extends 12.5 mm from the gearbox face plate.
Key Features
- 46.85:1 Gear Ratio – Metal spur gearbox for durability under load
- High-Power Motor – 12V brushed DC motor with strong torque output
- 220 RPM No-Load – Good balance of speed and torque
- 15 kg·cm Stall Torque – Sufficient for driving robot wheels and mechanisms
- 4 mm D-Shaft Output – 12.5 mm extension, compatible with standard hubs and couplers
- Compact 25D Form Factor – Under 25 mm diameter cylindrical body
Specifications
- Operating Voltage: 12V
- Gear Ratio: 46.85:1
- No-Load Speed: 220 RPM
- No-Load Current: 250 mA
- Stall Torque: 15 kg·cm (210 oz·in)
- Stall Current: 5.0A
- Output Shaft: 4 mm D-shaped, 12.5 mm long
- Motor Diameter: ~25 mm
- Motor Type: HP (High Power)
Ideal For
- Robot drive systems and wheeled platforms
- Motorised mechanisms and actuators
- Conveyor and positioning systems
- Projects requiring moderate speed with high torque
Package Contents
- 1× 47:1 Metal Gearmotor 25Dx52L mm HP 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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Brands
Robotics & Motion
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