12V 100 RPM Johnson Geared DC Motor – Grade B

The 12V 100 RPM Johnson Geared DC Motor is a robust and reliable component, perfect for projects that require high torque at a low rotational speed. Unlike standard DC motors, this unit incorporates a pre-installed gearbox, which significantly reduces the output shaft’s speed while multiplying its torque. This makes it an ideal choice for applications that need to lift, move, or push heavy loads with precision and stability. Engineers and hobbyists often choose this motor for its durability, consistent performance, and the balanced combination of speed and power it provides, making it a workhorse for everything from robotics to automation systems.

Key Features:

• High Torque Output: The integrated gearbox provides a substantial increase in torque, allowing the motor to handle heavy loads with ease.
• Low Rotational Speed: With a stable 100 RPM output, you get precise and controlled motion, which is critical for robotic arms, winches, and conveyor systems.
• Durable Construction: The motor features a robust metal gearbox and a high-quality carbon brush design, ensuring a long operational life.
• Bidirectional Operation: You can easily reverse the motor’s direction by simply changing the polarity of the power supply.
• Versatile Voltage Range: While rated for 12V, this motor can operate across a range of voltages, allowing you to adjust its speed and torque for different project needs.
• Quiet Operation: The geared system is designed to run smoothly, minimizing noise during operation.

Technical Specifications:

• Rated Voltage: 12V DC
• No-Load Speed: 100 RPM
• Rated Torque: ~12 kg-cm
• No-Load Current: 250 mA
• Stall Current: ~3.5 A
• Gearbox Reduction Ratio: 1:120 (approximate)
• Shaft Diameter: 6 mm

Mechanical Specifications:

• Body Material: Steel casing with metal gearbox.
• Shaft Type: D-cut shaft for secure mounting of wheels and couplings.
• Mounting Holes: Two M3 screw holes on the gearbox face for easy and secure installation.
• Motor Brushes: Carbon brushes for long-lasting performance.

Dimensions:

• Motor Length (excluding shaft): ~67 mm
• Motor Diameter: ~37 mm
• Shaft Length: ~22 mm

Pinout and Wiring:

• Wiring Terminals: Two solder-able terminals on the back of the motor.
• Wiring Note: Connect the motor’s terminals to your power supply. To reverse the direction of rotation, simply swap the connections. You can use an H-bridge motor driver to easily control both speed and direction from a microcontroller like Arduino.

Datasheet Reference:

• Download Datasheet (Note: A generic datasheet may be provided as specific manufacturer details can vary.)

Commonly Used in:

• Robotics: Powering the drive wheels of a mobile robot or the joints of a robotic arm.
• Automation: Used in conveyor belt systems, automated gates, or smart blinds.
• RC Projects: Providing the torque needed for RC tanks, crawlers, or other heavy vehicles.

Applications:

• Lifting Mechanisms: Create a small hoist, winch, or linear actuator.
• Smart Devices: Powering gears in a smart lock or an automated pet feeder.
• Model Making: Drive the moving parts of a scale model or diorama.

Equivalent Models:

• BO Motor: A simpler, lower-cost geared motor with plastic gears, suitable for light-duty applications.
• Pololu High-Power Metal Gearmotor: A more professional-grade, precision-engineered motor with a wider range of gear ratios.

Package Includes:

• 1 x 12V 100 RPM Johnson Geared DC Motor