Pololu 4798 / 4799 380:1 Micro Metal Gearmotor HPCB 12V
Pololu 4798 / 4799 380:1 Micro Metal Gearmotor HPCB 12V
Pololu 4798 / 4799 380:1 Micro Metal Gearmotor HPCB 12V
The Pololu 4798 / 4799 380:1 Micro Metal Gearmotor HPCB 12V is a compact, high-performance DC gearmotor engineered for precision robotics, automation systems, and embedded control applications requiring controlled torque output at reduced speeds. Professional engineers and hobbyists utilize this motor in autonomous vehicles, conveyor systems, and mechanical actuators where the 380:1 gear reduction provides exceptional holding torque while maintaining smooth, predictable motion control. This motor solves the critical challenge of delivering high torque from a minimal footprint while operating efficiently on standard 12V DC power supplies.
Product Overview
The Pololu 4798 / 4799 series represents the pinnacle of micro metal gearmotor design, combining a brushed DC motor core with a precision helical gear train to achieve the 380:1 reduction ratio. The HPCB designation indicates High Performance Carbon Brush construction, ensuring extended brush life and reduced electromagnetic noise compared to standard carbon brushes. The motor operates on 12V nominal voltage, drawing minimal current while delivering consistent torque output across the operational range. The compact cylindrical housing with integrated gearbox makes this motor ideal for space-constrained applications where traditional larger motors cannot fit.
The 380:1 gear reduction ratio is specifically engineered to transform the high-speed, low-torque characteristics of the base DC motor into a low-speed, high-torque output suitable for driving wheels, lifting mechanisms, and rotational loads. The helical gear design minimizes backlash and vibration, critical parameters for precision positioning in robotics and automation. The motor shaft features a D-shaped profile for secure coupling to wheels and gears, while the robust metal housing dissipates heat effectively during continuous operation. This model represents an optimal balance between power density, efficiency, and reliability for professional-grade applications.
Key Specifications
| Specification | Details |
| Product Type | 12V DC Micro Metal Gearmotor with Helical Gears |
| 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 |
| Gear Ratio | 380:1 |
| Nominal Voltage | 12V DC |
| No-Load Speed | Approximately 31 RPM at 12V |
| Stall Torque | Up to 1.5 kg-cm at 12V |
| Motor Type | Brushed DC with Carbon Brushes (HPCB) |
| Output Shaft | D-shaped profile for secure coupling |
Key Features
- 380:1 Helical Gear Reduction: Delivers high torque output of up to 1.5 kg-cm while maintaining smooth, controlled rotation ideal for precision applications
- High Performance Carbon Brushes (HPCB): Extended brush life and reduced electromagnetic interference compared to standard brushes, ensuring reliable long-term operation
- Compact Micro Metal Housing: Measures approximately 10mm diameter by 30mm length, enabling integration into space-constrained robotic platforms and automated systems
- D-Shaped Output Shaft: Provides secure, backlash-free coupling to wheels, gears, and mechanical components without slipping or misalignment
- 12V DC Operation: Direct compatibility with standard battery packs, power supplies, and microcontroller PWM outputs for speed control
- Low Backlash Design: Helical gears minimize mechanical play, critical for precise positioning and repeatable motion control in robotic applications
Applications and Use Cases
- Mobile Robotics: Drive motors for wheeled robots, autonomous vehicles, and line-following platforms requiring controlled torque and speed regulation
- Conveyor Systems: Precision conveyor belt drives in industrial automation, packaging lines, and material handling systems requiring smooth, continuous rotation
- Robotic Actuators: Joint motors for robotic arms, grippers, and mechanical manipulators where compact size and high torque are essential
- 3D Printer Mechanisms: Extruder drive motors and build platform positioning systems in FDM printers requiring precise speed control and holding torque
- Automated Door Systems: Sliding door and gate actuators in smart home and industrial applications requiring controlled opening and closing speeds
- Camera Pan-Tilt Mechanisms: Smooth panoramic camera movement systems in surveillance and aerial imaging platforms
How to Use
To integrate the Pololu 4798 / 4799 380:1 Micro Metal Gearmotor into your project, first identify the motor leads - typically red for positive and black for negative. Connect the motor directly to a 12V DC power supply to verify rotation direction and smooth operation. For speed control, connect the motor through a PWM motor driver module compatible with your microcontroller platform, whether Arduino, Raspberry Pi, or custom embedded systems. The PWM frequency should be set between 5-20 kHz to avoid audible noise while maintaining efficient power delivery.
Mechanically, secure the motor housing using the mounting brackets or adhesive appropriate to your application. Attach your driven load to the D-shaped output shaft using a set screw or friction fit coupling, ensuring the shaft is fully inserted to prevent slipping. Apply a small amount of mechanical grease to the output shaft bearing annually for extended operational life. For applications requiring precise speed feedback, consider adding an optical encoder or Hall effect sensor to the output shaft. Always verify the motor current draw under load does not exceed your power supply rating, and include appropriate current-limiting resistors or motor drivers in your circuit design.
Frequently Asked Questions
What is the maximum continuous current draw of the Pololu 4798 / 4799 motor at 12V?
The motor draws approximately 100-150mA under no-load conditions and can draw up to 500-800mA under stall conditions depending on mechanical load. For continuous operation, design your power supply for at least 300mA capacity to ensure stable voltage regulation. Using a motor driver module with current limiting protects both the motor and your power supply from damage due to sudden load spikes.
Can I operate this motor at voltages other than 12V?
While the motor is rated for 12V nominal operation, it can tolerate voltages between 6V and 16V DC. Operating below 12V reduces speed and torque proportionally, while exceeding 12V increases speed and current draw, potentially shortening brush life. For applications requiring variable speed, use PWM control at the rated 12V rather than varying the supply voltage to maintain consistent motor performance and longevity.
What is the gear backlash specification for the 380:1 reduction?
The helical gear design in this motor minimizes backlash to approximately 3-5 degrees at the output shaft, significantly better than spur gear alternatives. This low backlash is critical for precision robotics applications where repeatable positioning is essential. For applications requiring zero backlash, consider adding a mechanical backlash compensation system or upgrading to Pololu's premium anti-backlash models.
How do I reverse the motor direction?
Simply reverse the polarity of the power connections - swap the red and black leads. If using a motor driver module, most drivers include direction control pins that electronically reverse the motor rotation without physically swapping wires. This is the preferred method for microcontroller-based applications where direction reversal must be controlled programmatically.
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 4798 / 4799 380:1 Micro Metal Gearmotor HPCB 12V Online in India
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