N20 Gear Motor 6V 100RPM Shaft 4mm
Price in Sri Lanka

The N20 Gear Motor is a miniature high-torque DC motor integrated with a precision metal gearbox. This 6V 100RPM variant is a "standard" performance choice, offering a balanced mix of speed and torque that is ideal for mid-sized micro-robots. The shorter 4mm shaft is specifically designed for ultra-compact applications where a standard 10mm shaft would be too long or require excessive space.

Specifications

• Rated Voltage: 6V DC (Operating range: 3V – 9V).
• No-Load Speed: 100 RPM (at 6V).
• Shaft Type: D-shape (flat side to prevent gear or wheel slippage).
• Shaft Diameter: 3mm.
• Shaft Length: 4mm (Short version).
• Gearbox Material: All-metal (Precision brass and steel).
• No-Load Current: ~ 35mA.
• Stall Current: ~ 500mA (at 6V).
• Stall Torque: ~ 1.2 kgcm.

Features

• Ultra-Short 4mm Shaft: Perfect for mounting thin gears, custom couplers, or small wheels in tight enclosures where a standard 10mm shaft would interfere with other components.
• Precision Metal Gearing: Features a rugged, all-metal gear train that resists stripping and wear much better than plastic alternatives, even under heavy loads.
• Standard N20 Footprint: The motor body and gearbox dimensions are standard, ensuring it fits into any universal N20 mounting bracket.
• Balanced Output: 100 RPM at 6V provides enough speed for mobile robots while maintaining the torque needed to climb small inclines or push light obstacles.

Pin and Connection Guide

• Terminals: Two small solder tabs at the rear of the motor.
• Polarity: The motor is bidirectional. Swapping the positive and negative wires will reverse the rotation direction.
• PWM Support: Fully compatible with 6V-rated motor drivers (like the L298N, TB6612FNG, or DRV8833) for variable speed control.

Common Applications

• Compact Micro-Robots: Driving small wheeled robots where the chassis width is limited.
• Electronic Locks: Powering narrow-profile latch mechanisms in smart cabinets or safes.
• Precision Actuators: Moving internal parts in portable medical devices or handheld electronics.
• Custom Tooling: Driving small screw-mechanisms in DIY automated projects.

Usage Tips

• Shaft Clearance: Because the shaft is only 4mm long, ensure your wheel or coupler is designed for a shallow fit. Check that the set screw aligns perfectly with the D-flat for a secure hold.
• Mounting: Use a dedicated N20 bracket. Avoid over-tightening the screws, as the gearbox casing is thin and can deform, causing the gears to bind.
• Soldering: The terminals are delicate. Use thin-gauge wire (26AWG–30AWG) and apply heat-shrink tubing to provide strain relief and protect the tabs from breaking due to vibration.
• Voltage Limit: While it can run at 9V for more speed, it will increase heat and wear. 6V is the recommended "sweet spot" for reliability.