CGM25-370 DC Metal Gear Motor – 25mm High-Torque Geared Motor

The CGM25-370 DC Gear Motor is a compact brushed DC motor combined with a durable 25mm metal reduction gearbox, providing increased torque and reduced output speed for robotics, automation and mechanical projects.

Its compact size, metal gear construction and 4mm D-shaped output shaft make it well suited for robot wheels, mobile platforms, small mechanisms and DIY motion-control systems.

Technical Specifications

• Model: CGM25-370 / GM25-370 Series
• Motor Type: Brushed DC Motor
• Motor Construction: Permanent-Magnet DC Motor
• Gearbox Type: Metal Spur Gear Reduction
• Gearbox Diameter: Approx. 25mm
• Output Shaft Diameter: 4mm
• Shaft Type: D-Shaped
• Direction: Bidirectional
• Speed Control: PWM Compatible with Suitable Motor Driver
• Gear Material: Metal
• Maximum Torque: Depends on Gear Ratio
• Available Gear Ratios: Multiple Ratios Depending on Version
• Encoder: Not Included Unless Specifically Stated

Metal Reduction Gearbox

The integrated 25mm metal spur gearbox reduces the high rotational speed of the 370-size DC motor while increasing available output torque.

This makes the CGM25-370 more suitable for mechanical loads than a standard high-speed DC motor without a gearbox.

Different versions of the motor can use different reduction ratios, allowing the same motor family to provide either higher speed or higher torque.

4mm D-Shaped Output Shaft

The motor features a 4mm D-shaped output shaft.

The flat section of the shaft provides a secure mechanical connection for compatible:

• Robot Wheels
• Hubs
• Couplings
• Gears
• Pulleys
• Mechanical Linkages

Always verify the bore and shaft type of the accessory before installation.

Bidirectional Rotation

The CGM25-370 is a brushed DC motor, so its direction can be reversed simply by reversing the polarity applied to the motor terminals.

For electronic forward/reverse control, use a suitable H-bridge motor driver.

PWM Speed Control

Motor speed can be controlled using PWM through a suitable DC motor driver.

Compatible control platforms can include:

• Arduino
• ESP32
• STM32
• Raspberry Pi Pico
• PIC / AVR Microcontrollers

The microcontroller should not power the motor directly from a GPIO pin. A suitable motor driver must be used between the controller and motor.

Suitable Motor Drivers

Depending on the actual motor current and application, the CGM25-370 can be controlled using an appropriately rated brushed DC motor driver or H-bridge.

The motor driver's voltage and current ratings should be selected according to the exact CGM25-370 version being used, with sufficient margin for startup and stall current.

Applications

Ideal for:

• Mobile Robots
• Robot Cars
• Tracked Robots
• Smart Car Chassis
• Arduino Robotics
• ESP32 Robotics
• DIY Automation
• Small Conveyors
• Mechanical Mechanisms
• Educational Robotics
• RC Projects
• Motorized Platforms
• Prototyping

Important Voltage & RPM Note

The CGM25-370 / GM25-370 is a motor family available in multiple voltage and gearbox configurations.

Depending on the specific version, motors can have different:

• Rated Voltages
• Output Speeds
• Gear Ratios
• Torque Ratings
• Gearbox Lengths

For this reason, always confirm the voltage and RPM marking of the actual motor before connecting power.

Do not assume that every CGM25-370 has the same operating voltage or speed.

Important Motor Driver Note

DC motors can draw significantly more current during startup or when the shaft is stalled than during normal operation.

Always select a motor driver and power supply capable of handling the motor's required current with adequate safety margin.

Do not connect the motor directly to an Arduino, ESP32 or other microcontroller GPIO pin.

Package Includes

1 × CGM25-370 DC Metal Gear Motor