Pololu 3700/3701/3702/3703/3704/3705/3706/3707/3708/3709/3710/3711 Metal Gearmotor 6V CB
Pololu 3700/3701/3702/3703/3704/3705/3706/3707/3708/3709/3710/3711 Metal Gearmotor 6V CB
Pololu 3700/3701/3702/3703/3704/3705/3706/3707/3708/3709/3710/3711 Metal Gearmotor 6V CB
The Pololu Metal Gearmotor 6V CB series represents a comprehensive range of compact, high-performance DC motors with integrated metal gearboxes designed for robotics, automation, and embedded systems applications. Professional engineers and hobbyists rely on these motors for precise speed and torque control in mobile robots, conveyor systems, and mechanical automation projects. This product solves the critical challenge of achieving reliable, efficient motion control with minimal backlash while maintaining compact form factors suitable for space-constrained designs.
Product Overview
The Pololu 3700-3711 Metal Gearmotor series features a brushed DC motor coupled with a precision metal gearbox that delivers consistent torque output across the 6V operating range. The metal gear construction ensures superior durability and lower backlash compared to plastic alternatives, making these motors ideal for applications requiring accurate positioning and repeatable performance. Each model in the series offers different gear ratios and output specifications, allowing engineers to select the exact speed-torque combination needed for their specific application without over-engineering or undersizing their mechanical systems.
The CB designation indicates these motors feature a cylindrical brush design optimized for extended brush life and reduced electromagnetic interference. The integrated gearbox uses hardened steel gears with precise machining tolerances, ensuring smooth operation and minimal noise generation even under sustained load conditions. The 6V nominal voltage rating provides excellent compatibility with standard battery packs, solar power systems, and regulated DC power supplies commonly used in robotics and IoT projects, while the metal construction provides thermal stability and consistent performance across temperature variations.
Key Specifications
| Specification | Details |
| Product Type | Metal Gearmotor with Integrated Gearbox |
| Brand | Pololu Robotics and Electronics |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Nominal Voltage | 6V DC |
| Motor Type | Brushed DC Motor |
| Gearbox Material | Hardened Steel Gears |
| Gear Ratio Range | Multiple ratios available across 3700-3711 series |
| Output Shaft | Dual shaft configuration with extended output |
Key Features
- Metal Gearbox Construction: Hardened steel gears with precision machining deliver minimal backlash below 5 degrees, ensuring accurate positioning for robotic arms and mechanical assemblies
- Multiple Gear Ratios: Series includes 12 distinct models with gear ratios from 50:1 to 1000:1, enabling selection of optimal speed-torque characteristics for specific load requirements
- Brushed DC Design: Cylindrical brush configuration provides smooth commutation, extended operational life exceeding 10,000 hours, and compatibility with simple PWM speed control circuits
- Compact Form Factor: Integrated gearbox eliminates external coupling requirements, reducing mechanical complexity and enabling installation in space-constrained robotic platforms
- Dual Output Shaft: Extended output shaft with flat edge allows direct coupling to wheels, pulleys, or mechanical linkages without additional adapters
- Thermal Stability: Metal housing dissipates heat efficiently, maintaining consistent torque output and motor characteristics across ambient temperature ranges of 0 to 50 degrees Celsius
Applications and Use Cases
- Mobile Robotics: Drive wheels and locomotion systems in differential-drive robots, where precise speed control and reliable torque delivery ensure accurate navigation and obstacle avoidance
- Robotic Manipulators: Joint actuation in multi-axis robotic arms and grippers, where low backlash and consistent torque enable smooth, repeatable pick-and-place operations in manufacturing automation
- Conveyor Systems: Material handling and sorting applications requiring sustained torque delivery with minimal speed variation, ensuring reliable product movement in warehouse automation
- Automated Door and Gate Systems: Access control mechanisms where controlled speed and holding torque prevent damage to door frames while ensuring safe, smooth operation
- Educational Robotics Platforms: Learning systems and STEM projects where students develop programming and mechanical engineering skills using reliable, well-documented motor components
- Mechatronic Prototyping: Rapid prototyping of mechanical systems where engineers need plug-and-play motor solutions with predictable performance characteristics and minimal integration complexity
How to Use
To implement the Pololu Metal Gearmotor 6V CB in your project, begin by selecting the appropriate gear ratio model based on your required output speed and torque calculations. Connect the motor terminals to a 6V power source through a motor driver circuit such as an H-bridge or PWM controller, ensuring proper polarity for forward rotation. The motor accepts PWM signals ranging from 0 to 100 percent duty cycle, allowing software-controlled speed regulation from complete stop to maximum RPM. Mount the motor securely using the provided mounting brackets, ensuring the output shaft remains unobstructed and properly aligned with driven mechanisms to prevent binding or premature bearing wear.
For optimal performance, implement current limiting protection in your power supply circuit to prevent damage during stall conditions, and use decoupling capacitors across motor terminals to suppress electromagnetic noise that could interfere with nearby sensors or communication circuits. If your application requires bidirectional rotation, use an H-bridge motor driver that allows independent control of forward and reverse motion through logic-level inputs. Monitor motor temperature during extended operation under heavy load, and ensure adequate ventilation around the motor housing to maintain thermal stability. For applications requiring speed feedback, consider adding an optical encoder to the output shaft, enabling closed-loop control systems that maintain constant speed despite load variations.
Frequently Asked Questions
What is the difference between the various models in the 3700-3711 series?
Each model in the Pololu 3700-3711 series features different internal gear ratios that determine the output speed and torque characteristics. Lower numbered models typically offer higher output speeds with lower torque, while higher numbered models provide reduced speed with increased torque multiplication. Consult the detailed specification sheet for your specific model number to identify the exact gear ratio, no-load RPM, and stall torque values required for your application calculations.
Can these motors be controlled with PWM, and what frequency range is recommended?
Yes, the Pololu Metal Gearmotor 6V CB series fully supports PWM speed control through standard motor driver circuits. Recommended PWM frequencies range from 5 kHz to 20 kHz to avoid audible noise and ensure smooth speed regulation without causing excessive switching losses in the driver circuit. Lower frequencies below 1 kHz may cause noticeable cogging or jerky motion, while frequencies above 20 kHz provide no additional benefit and increase power consumption in the driver electronics.
What is the maximum continuous current draw, and how should I size my power supply?
The maximum continuous current draw varies by gear ratio model and load conditions, typically ranging from 200 mA to 800 mA at 6V nominal voltage under moderate load. Consult your specific model's datasheet for exact current specifications. Size your power supply with at least 50 percent additional capacity beyond calculated requirements to accommodate startup transients and ensure voltage stability. For battery-powered applications, use high-discharge-rate lithium or NiMH batteries rated for at least 1.5 times the maximum motor current to prevent voltage sag during peak demand.
What is the backlash specification, and how does it affect my application?
The Pololu Metal Gearmotor series exhibits backlash below 5 degrees due to precision metal gear construction, significantly lower than plastic gearbox alternatives which may exhibit 10-15 degrees of backlash. This low backlash is critical for applications requiring accurate positioning such as robotic arms or automated machinery. If your application demands even lower backlash, consider implementing anti-backlash coupling mechanisms or using closed-loop encoder feedback to compensate for any gear mesh irregularities.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
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- Returns: 7-day return policy on manufacturing defects only
Buy Pololu 3700/3701/3702/3703/3704/3705/3706/3707/3708/3709/3710/3711 Metal Gearmotor 6V CB Online in India
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