Pololu 1570 / 1571 / 1572 / 1573 / 1574 / 1575 / 1576 / 1577 Metal Gearmotor 25D HP 6V
Pololu 1570 / 1571 / 1572 / 1573 / 1574 / 1575 / 1576 / 1577 Metal Gearmotor 25D HP 6V
Pololu 1570 / 1571 / 1572 / 1573 / 1574 / 1575 / 1576 / 1577 Metal Gearmotor 25D HP 6V
The Pololu 1570-1577 Metal Gearmotor 25D HP series is a high-performance brushed DC motor with integrated metal gearbox designed for 6V operation, delivering exceptional torque and speed control in a compact form factor. Robotics engineers, autonomous vehicle developers, and industrial automation specialists rely on this motor for applications demanding precision motion control with minimal backlash and maximum mechanical reliability. This motor solves the critical challenge of balancing power delivery, speed regulation, and mechanical durability in space-constrained robotic platforms and mobile systems.
Product Overview
The Pololu 25D HP metal gearmotor combines a coreless DC motor with a precision metal planetary or spur gearbox, offering multiple gear ratio options across the 1570-1577 model range. The motor operates at 6V nominal voltage and features a robust metal construction that ensures long operational life even under continuous duty cycles. The integrated gearbox design eliminates external mounting complexity while providing direct shaft output with minimal runout, making it ideal for direct wheel coupling in mobile robots or precision positioning applications.
Each model variant in the 1570-1577 series offers different gear ratios ranging from approximately 30:1 to 1000:1, allowing engineers to select the optimal speed-torque characteristic for their specific application. The motor shaft is constructed from hardened steel with precision-machined output coupling points, and the gearbox features metal gears that deliver low-noise operation and exceptional mechanical efficiency. The compact 25mm diameter cylindrical housing integrates seamlessly into modular robot chassis designs and fits standard motor mounting brackets used across the robotics industry.
Key Specifications
| Specification | Details |
| Product Type | Metal Gearmotor with Integrated Planetary/Spur 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 | 6V DC |
| Motor Type | Brushed Coreless DC Motor |
| Gearbox Type | Metal Planetary or Spur (varies by model) |
| Gear Ratios Available | 30:1, 50:1, 100:1, 150:1, 298:1, 500:1, 1000:1 (model dependent) |
| Output Shaft Diameter | 3.5mm or 4mm (model dependent) |
| Motor Diameter | 25mm |
| Typical No-Load Speed | 100 to 300 RPM (varies with gear ratio) |
| Typical Stall Torque | 0.5 to 10 kg-cm (varies with gear ratio) |
Key Features
- Metal Gearbox Construction: Precision-machined metal gears deliver superior durability and low backlash compared to plastic alternatives, essential for accurate positioning and load handling in robotic applications
- Multiple Gear Ratio Options: The 1570-1577 series spans seven distinct gear ratios allowing engineers to precisely match motor characteristics to application requirements without external reduction stages
- Compact 25D Form Factor: The integrated 25mm diameter cylindrical design fits standard robot chassis and mounting brackets, enabling space-efficient integration in mobile platforms and manipulators
- Coreless Motor Design: The brushless coreless motor architecture minimizes cogging torque and vibration, providing smooth operation critical for precision motion control and wheel drive applications
- Direct Shaft Output: Hardened steel output shaft with precision machining eliminates coupling losses and enables direct wheel mounting or gear coupling without additional mechanical interfaces
- Low-Noise Operation: Metal gearbox design produces minimal audible noise compared to plastic gear alternatives, important for indoor robotic deployments and sensitive environments
Applications and Use Cases
- Mobile Robot Drive Systems: Powers differential drive configurations in autonomous ground robots where matched motor pairs with consistent torque characteristics ensure straight-line motion and precise turning control
- Robotic Arm Actuators: Drives joint motors in articulated robotic arms where the selectable gear ratios provide appropriate speed-torque combinations for different joint types and load requirements
- Autonomous Vehicle Platforms: Serves as primary propulsion motor in small autonomous vehicles and rovers where reliability and consistent performance across variable terrain demands metal gear construction
- Precision Positioning Systems: Enables accurate position control in turntables, camera pan-tilt mechanisms, and conveyor systems where low backlash and smooth torque delivery are critical
- Educational Robotics Platforms: Powers competition robots in FIRST Robotics and similar programs where standardized motor selection ensures fair competition and simplified integration
- Wheeled Locomotion Modules: Drives omnidirectional wheel platforms and mecanum wheel systems where synchronized motor performance across multiple units enables complex motion patterns
How to Use
Begin by identifying the correct model variant for your application based on required output torque and speed characteristics. The gear ratio determines the motor's performance curve: lower ratios (30:1, 50:1) provide higher speeds with lower torque suitable for fast mobile robots, while higher ratios (500:1, 1000:1) deliver maximum torque at reduced speeds for load-bearing applications. Connect the motor leads to your motor controller or battery through appropriate current-limiting circuitry, ensuring the power supply can deliver the required current for your gear ratio and load conditions. Typical stall current ranges from 0.5A to 2A depending on the selected model, so size your power supply and controller accordingly.
Mount the motor securely using the cylindrical housing diameter and mounting flanges, ensuring the output shaft aligns precisely with your load coupling mechanism. For wheel drive applications, couple the motor shaft directly to your wheel hub using a 3.5mm or 4mm shaft collar and set screw, depending on your model variant. Apply 6V DC power through your motor controller to verify rotation direction and speed characteristics before full integration. If bidirectional control is required, use an H-bridge motor driver to reverse polarity. For applications requiring feedback, consider adding an optical encoder to the output shaft for closed-loop speed control and odometry calculations in autonomous systems.
Frequently Asked Questions
What is the difference between the various Pololu 1570-1577 models?
Each model in the 1570-1577 series features a different gear ratio configuration. Model 1570 offers 30:1 ratio with highest speed and lowest torque, while model 1577 provides 1000:1 ratio with maximum torque and lowest speed. Intermediate models (1571-1576) offer 50:1, 100:1, 150:1, 298:1, and 500:1 ratios respectively. Select your model based on your application's speed and torque requirements: faster robots use lower ratios, while load-bearing applications require higher ratios.
Can I operate this motor at voltages other than 6V?
The Pololu 25D HP is rated for 6V nominal operation, and operating beyond 8V risks damaging the motor windings and gearbox components. Operating below 3V may result in insufficient torque to overcome gearbox friction. For applications requiring different voltage levels, consider using a voltage regulator to step down higher supply voltages to 6V, or select alternative Pololu motor models specifically designed for 12V or 24V operation.
What is the maximum continuous current draw for this motor?
Continuous current draw varies by gear ratio and load: lower gear ratios (30:1-100:1) typically draw 0.3-0.8A at full load, while higher ratios (500:1-1000:1) draw 0.5-2A. Stall current (maximum current when motor is blocked) can reach 2-3A depending on the model. Always size your motor controller and power supply to handle at least 1.5x the expected continuous current to ensure safe operation and prevent thermal damage to the motor windings.
How much backlash does the metal gearbox have?
The metal gearbox design in the Pololu 25D HP series provides approximately 3-5 degrees of backlash, significantly lower than plastic gear alternatives which typically exhibit 10-15 degrees. This low backlash is critical for applications requiring precise positioning, such as robotic arms and turntables. If your application demands even lower backlash, consider implementing software-based backlash compensation in your motor controller or using dual-motor configurations with spring tensioning.
Is this motor suitable for continuous operation?
Yes, the Pololu 25D HP metal gearmotor is designed for continuous duty operation. The metal gearbox construction and coreless motor design handle sustained operation better than plastic alternatives. However, monitor motor temperature during extended operation: if the motor housing becomes too hot to touch, reduce the duty cycle or improve cooling by adding heatsinks or increasing airflow around the motor. For applications requiring extended high-power operation, implement current limiting in your motor controller to prevent thermal damage.
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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