Product Overview
The 3–9V 77RPM DC Gear Motor is a compact low-speed, high-torque motor widely used in robotics, automation projects, and educational electronics kits.
It features a durable plastic gearbox with metal internal gears, delivering reliable torque output at a controlled rotational speed of approximately 77 revolutions per minute (RPM).
This motor is commonly used with Arduino boards, motor driver modules, and robotic platforms where precise movement and controlled speed are required.
It is ideal for applications such as robot cars, rotating display signs, conveyor models, and DIY automation systems.
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Key Features
• Wide Operating Voltage: Supports 3V to 9V DC operation
• Low Speed Output: ~77 RPM for controlled mechanical motion
• High Torque Gear Reduction: Suitable for driving wheels and mechanisms
• Compact Design: Easy to integrate in small robotics projects
• Metal Gear Mechanism: Improved durability and longer service life
• Standard Shaft Design: Compatible with common robot wheels and couplers
• Low Power Consumption: Efficient operation for battery-powered systems
• Educational Friendly: Ideal for STEM and robotics training kits
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Technical Specifications
• Motor Type: Brushed DC Gear Motor
• Rated Voltage: 3V – 9V DC
• No-Load Speed: ~77 RPM
• Gearbox Type: Reduction gearbox (plastic housing with metal gears)
• Shaft Type: D-shaped shaft
• Shaft Diameter: approx. 5 mm
• Motor Length: approx. 70 mm
• Gearbox Size: approx. 70 × 22 × 18 mm
• Weight: approx. 30 g
• Rotation Direction: Reversible (change polarity)
• Operating Current: approx. 150–300 mA (no load)
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Key Advantages Over Standard DC Motors
• Stable and controllable speed due to gear reduction
• Higher torque output compared with direct DC motors
• Compatible with common robotics driver modules
• Reliable performance for long operating cycles
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Typical Applications
• Arduino robotics cars
• Educational robotics kits
• Rotating advertising displays
• Automatic signage systems
• Small conveyor mechanisms
• DIY automation projects
• STEM learning projects