Pololu 3047/3048/3049/3050/3051/3052/3053/3054/3055/3056/3057 Micro Metal HPCB Gearmotor - 12V
Pololu 3047/3048/3049/3050/3051/3052/3053/3054/3055/3056/3057 Micro Metal HPCB Gearmotor - 12V
Pololu 3047/3048/3049/3050/3051/3052/3053/3054/3055/3056/3057 Micro Metal HPCB Gearmotor - 12V
The Pololu Micro Metal HPCB Gearmotor series (models 3047-3057) represents a compact, high-performance brushed DC motor solution engineered for robotics, automation, and embedded systems requiring precise speed control and consistent torque delivery. Professional roboticists, hobbyists, and industrial automation engineers rely on these gearmotors to power mobile robots, conveyor systems, and precision positioning mechanisms where space constraints and power efficiency are critical design parameters. This product solves the fundamental challenge of integrating reliable, compact motion control into size-limited applications while maintaining excellent power-to-weight ratios and repeatable performance across extended operational cycles.
Product Overview
The Pololu Micro Metal HPCB Gearmotor series features a brushed DC motor architecture combined with precision helical gearing, delivering smooth, quiet operation with minimal backlash. The HPCB designation indicates the use of a high-performance custom-designed gearbox optimized for torque multiplication while maintaining efficiency. These motors operate at 12V nominal input, producing variable RPM and torque outputs depending on the selected gear ratio model within the series. The integrated gearbox design eliminates the need for external gear coupling, reducing assembly complexity and mechanical play that could compromise positioning accuracy in closed-loop control applications.
Each model in the 3047-3057 range offers different gear ratios, allowing engineers to select the optimal speed-torque tradeoff for their specific application without changing the motor platform. The compact cylindrical form factor with 6mm diameter shaft accommodates standard Pololu wheel adapters and coupling mechanisms. Built-in mechanical feedback characteristics and predictable load response make these gearmotors ideal for encoder-equipped systems requiring real-time velocity feedback. The robust construction withstands intermittent shock loads common in mobile robotics while maintaining consistent performance across temperature ranges typical of indoor and controlled outdoor environments.
Key Specifications
| Specification | Details |
| Product Type | 12V Brushed DC Micro Metal Gearmotor with HPCB 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 Operating Voltage | 12V DC |
| Motor Type | Brushed DC with Helical Gearbox |
| Output Shaft Diameter | 6mm |
| Gear Ratio Range | 5:1 to 1000:1 depending on model selection |
| Typical No-Load Speed | 50 to 1000 RPM depending on gear ratio |
| Typical Stall Torque | 0.5 to 10 kg-cm depending on gear ratio |
Key Features
- Compact Micro Form Factor: 10mm diameter motor body with integrated gearbox enables installation in space-constrained robotic platforms and miniature automation equipment
- High-Performance Helical Gearbox: HPCB design delivers smooth, efficient power transmission with minimal backlash for accurate positioning and velocity control
- Multiple Gear Ratio Options: Series models 3047-3057 provide seven distinct gear ratios optimizing speed-torque characteristics for diverse application requirements
- 12V Brushed DC Architecture: Direct voltage control enables simple PWM-based speed regulation without complex drive electronics or microcontroller integration
- Encoder-Compatible Design: Standard 6mm output shaft accommodates Pololu magnetic encoders for closed-loop feedback control in autonomous systems
- Robust Construction: Metal gearbox housing and precision-machined components ensure reliable operation under continuous duty cycles and intermittent shock loads
Applications and Use Cases
- Mobile Robot Propulsion: Powers wheeled platforms in educational robotics competitions and research environments where compact, reliable drive systems are essential for autonomous navigation
- Conveyor and Material Handling: Drives small conveyor belts, sorting mechanisms, and automated pick-and-place systems in laboratory and light industrial automation setups
- Robotic Arm Actuation: Provides joint actuation in multi-axis robotic arms where torque density and compact packaging enable complex mechanical designs within size limitations
- Precision Positioning Systems: Enables stepper-motor-alternative solutions in applications requiring smooth speed control, reduced electromagnetic noise, and mechanical simplicity
- Educational Robotics Platforms: Serves as the standard propulsion component in Arduino-based and Raspberry Pi-controlled robot kits due to proven reliability and extensive documentation
How to Use
To integrate the Pololu Micro Metal HPCB Gearmotor into your system, first select the appropriate model from the 3047-3057 series based on your required torque and speed specifications. Connect the motor leads to a 12V DC power source through a motor driver circuit capable of PWM control, such as the Pololu TB6612FNG or DRV8835 dual motor driver. Ensure the motor driver supports bidirectional control if your application requires forward and reverse rotation. Mount the gearmotor securely using the provided mounting brackets, aligning the 6mm output shaft with your driven load to minimize mechanical runout and vibration.
For closed-loop control applications, attach a Pololu magnetic encoder to the output shaft to provide real-time velocity feedback to your microcontroller. Configure your PWM signal frequency between 5-20 kHz to optimize efficiency and minimize audible noise while avoiding resonant frequencies that could cause mechanical vibration. Implement software control routines that monitor encoder feedback and adjust PWM duty cycle to maintain target velocity despite load variations. Always include current-limiting protection in your motor driver circuit to prevent damage during stall conditions or unexpected mechanical jamming. For optimal longevity, operate the motor within rated voltage specifications and avoid continuous stall conditions exceeding 30 seconds duration.
Frequently Asked Questions
What is the difference between the various Pololu 3047-3057 models?
The Pololu 3047-3057 series consists of seven distinct models offering different gear ratios within the same compact form factor. Model 3047 provides the lowest gear ratio with highest speed and lowest torque, while model 3057 offers the highest gear ratio with lowest speed and highest torque output. Intermediate models provide graduated speed-torque tradeoffs. Selection depends on your application requirements: use lower ratio models for speed-critical applications like mobile robot racing, and higher ratio models for torque-intensive applications like climbing or load-bearing mechanisms.
Can I use these motors with Arduino or Raspberry Pi microcontrollers?
Yes, these 12V gearmotors work excellently with Arduino and Raspberry Pi platforms when paired with appropriate motor driver modules. You cannot connect the motor directly to microcontroller GPIO pins due to voltage and current requirements. Instead, use a dedicated motor driver like the Pololu TB6612FNG (supports dual motors with PWM speed control) or DRV8835 (compact dual-channel driver). Connect the motor driver output to the gearmotor leads, supply 12V power to the driver, and control speed via PWM signals from your microcontroller GPIO pins. This configuration enables full software control of motor speed and direction.
What is the maximum current draw and how should I size my power supply?
Stall current for Pololu Micro Metal gearmotors typically ranges from 1.5A to 3A depending on gear ratio, with no-load current around 0.2-0.5A. For a single motor system, a 12V power supply rated for at least 3A provides adequate headroom. For multi-motor robots, calculate total stall current by multiplying single-motor stall current by the number of motors, then select a power supply with 20-30% additional capacity for safety margin. For example, a four-motor robot with 2A stall current per motor requires approximately 10-12A supply capacity. Consider using a 12V lithium battery pack rated for continuous discharge at your calculated current draw.
How do I attach wheels or other loads to the 6mm output shaft?
The 6mm diameter output shaft accommodates standard Pololu wheel adapters and couplings available separately. For direct wheel attachment, use the Pololu Wheel Adapter Set which includes set-screw couplings that grip the shaft securely. Slide the wheel adapter onto the shaft and tighten the set screw firmly using a 1.5mm hex wrench to prevent slipping under load. For flexible coupling to reduce vibration transmission, use the Pololu Universal Aluminum Coupling which accommodates slight misalignment while maintaining torque transfer. Always verify that your wheel or load is balanced to minimize vibration, which can reduce motor lifespan and degrade control accuracy in closed-loop systems.
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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