The N20 Gear Motor is a high-torque, miniature DC motor integrated with a precision metal gearbox. Known for its small cross-section and reliability, it is the standard choice for micro-robotics, electronic locks, and precision instrumentation where space is limited but mechanical power is required.

Specifications

• Rated Voltage: 6V DC (Operational range: 3V – 9V).
• Speed (at 6V): 30 RPM (Revolutions Per Minute).
• Shaft Type: D-shape (single flat side to prevent gear slippage).
• Shaft Diameter: 3mm.
• Shaft Length: 10mm.
• Gearbox Material: All-metal (brass/steel) for durability.
• No-Load Current: ~ 30mA.
• Stall Current: ~ 500mA (at 6V).
• Stall Torque: ~ 5.0 kgcm (varies by manufacturer).

Features

• High Torque-to-Size Ratio: Despite its tiny footprint, the high reduction gear ratio allows this motor to move significant loads compared to standard small DC motors.
• Precision Metal Gears: Unlike plastic gear motors, the all-metal construction provides high wear resistance and a much longer operational lifespan under load.
• Compact Form Factor: The "cross-style" gearbox design allows it to fit into slim enclosures and tight robotic chassis.
• D-Shaped Output Shaft: The 10mm length and D-profile ensure that wheels, gears, or couplers can be securely attached without spinning freely on the shaft.

Pin and Connection Guide

• Terminal 1 (+): Positive terminal (typically marked with a small red dot or plus sign).
• Terminal 2 (-): Negative terminal.
• Reversibility: Swapping the polarity of the connections will reverse the direction of rotation.

Common Applications

• Micro-Robotics: Ideal for small mobile robots, "Sumo" bots, and line followers.
• Smart Home Hardware: Powering electronic door locks, automatic blinds, and small security cameras.
• Precision Actuators: Used in 3D printers for auto-levelling probes or small-scale linear actuators.
• Medical Devices: Driving miniature pumps or adjustment mechanisms in portable equipment.

Usage Tips

• Mounting: Use a dedicated N20 Mounting Bracket to secure the motor. Avoid applying excessive glue directly to the gearbox, as it can seep inside and jam the gears.
• Stall Prevention: Do not let the motor stay in a "stall" condition (where the shaft is blocked while power is applied) for more than a few seconds, as the high current can quickly burn out the small motor windings.
• Voltage Flexibility: While rated for 6V, it can run at 3V (slower/less torque) or 9V (faster/more torque, but shorter lifespan). 6V is the optimal balance for performance and longevity.
• Wiring: The terminals are delicate. It is recommended to use flexible silicone wire and apply a small piece of heat-shrink tubing over the soldered joints for strain relief.