BMT JGA25-370 DC Geared Motor 12V 26RPM 8.4kg.cm Torque

The BMT DC Motor 12V 26RPM is a compact JGA25-370 DC geared motor designed for robotics, automation, mobile platforms and other applications requiring a combination of low-speed rotation and high output torque.

The integrated gearbox provides a reduction ratio of approximately 1:78, reducing the motor's high-speed rotation to a controlled output speed of approximately 26RPM at 12V. This makes the motor suitable for applications where controlled movement and torque are more important than high rotational speed.

The motor features a 4mm diameter D-shaped output shaft, allowing compatible wheels, gears, couplings and other mechanical components to be securely mounted to the output shaft.

With a stated stall torque of greater than 8.4kg cm at 12V, the motor is well suited to small robotic drive systems, automated mechanisms and other projects requiring a geared motor with useful mechanical output.

Features

• JGA25-370 DC geared motor.
• Nominal operating voltage of 12V DC.
• Operating voltage range of 6-18V DC.
• No-load speed of approximately 26RPM at 12V.
• Approximately 1:78 gear reduction ratio.
• High output torque for a compact geared motor.
• Stall torque greater than 8.4kg cm at 12V.
• 4mm diameter D-shaped output shaft.
• Easy to integrate into robotics and mechanical projects.
• Suitable for wheels, gears and mechanical couplings.
• Compact geared motor design.
• Suitable for low-speed, high-torque applications.
• Useful for robotic vehicles and automated mechanisms.

Specifications

• Product Code: BMT DC MOTOR 12V 26RPM
• Motor Model: JGA25-370
• Motor Type: DC Geared Motor
• Nominal Voltage: 12V DC
• Operating Voltage: 6-18V DC
• No-Load Speed at 12V: 26RPM
• Free-Run Current at 12V: 50mA
• Stall Current at 12V: 1200mA
• Stall Torque at 12V: Greater than 8.4kg cm
• Gear Ratio: Approximately 1:78
• Output Shaft Diameter: 4mm
• Output Shaft Profile: D-shaped
• D-Shaped Shaft Dimension: Approximately 3.4mm
• Application: Robotics, automation and mechanical projects

Geared Motor Design

The JGA25-370 combines a DC motor with an integrated reduction gearbox. The approximately 1:78 gear ratio reduces the rotational speed while increasing the available output torque.

This makes the motor particularly useful for applications where a slower, more controlled output is required, such as robotic wheels, positioning mechanisms and automated mechanical systems.

26RPM Output Speed

At the nominal 12V supply, the motor has a stated no-load output speed of approximately 26RPM.

The actual operating speed will depend on the applied voltage and mechanical load. When the motor is loaded, its speed will generally decrease compared with its no-load speed.

The 26RPM specification should therefore be regarded as a no-load reference speed, rather than a guaranteed speed under load.

High Output Torque

The motor provides a stated stall torque of greater than 8.4kg cm at 12V.

This makes it suitable for projects requiring relatively high mechanical force from a compact geared motor.

Potential applications include:

• Robot wheels
• Small mobile platforms
• Automated mechanisms
• Mechanical actuators
• Rotating platforms
• Model machinery
• DIY robotics
• Low-speed drive systems

The actual usable torque depends on the motor's operating conditions and should remain below the stall condition during normal operation. Prolonged operation at or near stall can result in high current draw and motor heating.

D-Shaped Output Shaft

The motor features a 4mm diameter D-shaped output shaft. The flattened side of the shaft helps provide positive engagement with a suitably sized wheel, coupling, gear or other mechanical component.

When selecting an accessory, ensure that the shaft diameter and D-profile are compatible with the selected component.

Electrical Characteristics

At the specified 12V nominal voltage, the supplied specifications indicate:

• Free-run current: Approximately 50mA
• Stall current: Approximately 1200mA
• Free-run speed: Approximately 26RPM
• Stall torque: Greater than 8.4kg cm

The significantly higher stall current means the power supply and motor driver should be capable of handling startup and high-load current demands.

Motor Driver Requirements

The motor should be controlled using an appropriately rated DC motor driver, H-bridge or other suitable motor-control circuit.

The motor should not be connected directly to a microcontroller GPIO pin, as the motor requires considerably more current than typical microcontroller outputs can provide.

When designing a robotic system, select the motor driver according to the motor's operating and stall current requirements.

Applications

The BMT JGA25-370 geared motor is suitable for:

• DIY robotics
• Robot cars
• Mobile robot platforms
• Automated mechanisms
• Low-speed drive systems
• Mechanical prototypes
• Model vehicles
• Small machinery
• Conveyor mechanisms
• Rotating platforms
• Actuator projects
• Arduino robotics
• STEM projects
• Educational electronics
• Custom automation systems

Power and Usage Considerations

The motor has a 12V nominal voltage and can operate within the supplied 6-18V range. Speed will vary according to the applied voltage.

For reliable operation:

• Use an appropriately rated DC power supply.
• Use a motor driver suitable for the motor's current requirements.
• Allow for the higher current drawn during startup and heavy loading.
• Avoid prolonged stall operation.
• Ensure the mechanical load is appropriate for the available torque.
• Do not exceed the specified operating voltage range.

Note: Motor driver, power supply, wheels, couplings, mounting hardware and other accessories are not included unless specifically stated. The 26RPM rating is specified at 12V with no load, while the stated 8.4kg cm torque is a stall-torque specification.

What's in the box
1 x BMT JGA25-370 DC Geared Motor 12V 26RPM 8.4kg.cm Torque