Pololu 4747 / 4748 Metal Gearmotor 37Dx50L mm 12V - Helical Pinion

The Pololu 4747/4748 Metal Gearmotor is a compact 12V DC motor with integrated helical pinion gearbox, delivering high torque output in a 37mm diameter by 50mm length form factor. This motor is widely used by roboticists, automation engineers, and embedded systems developers who require reliable, space-efficient drivetrain solutions for mobile robots, conveyor systems, and precision machinery. The helical gear design eliminates the backlash and noise issues common in spur gears, making it ideal for applications demanding smooth, quiet operation with minimal power loss.

Product Overview

The Pololu 4747/4748 Metal Gearmotor combines a high-efficiency brushed DC motor with a precision helical gear reduction system. The helical pinion arrangement ensures smooth power transmission with reduced vibration and noise compared to traditional spur gear designs. The motor shaft is directly coupled to the gearbox output, eliminating separate coupling requirements and reducing assembly complexity. The metal construction provides superior heat dissipation and mechanical durability, making this motor suitable for continuous-duty applications requiring consistent performance over extended operational periods.

This gearmotor operates at 12V DC nominal voltage and features a robust metal housing with sealed bearings to protect internal components from dust and moisture contamination. The helical gear geometry distributes loads across multiple teeth simultaneously, resulting in lower stress concentrations and extended component lifespan. The compact cylindrical design allows integration into confined spaces while maintaining sufficient torque output for demanding mechanical applications. The precision manufacturing ensures repeatable performance characteristics across production batches, making it ideal for scalable robotics projects and commercial automation systems.

Key Specifications

Specification	Details
Product Type	12V DC Metal Gearmotor with Helical Pinion
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
Motor Diameter	37mm
Motor Length	50mm
Nominal Voltage	12V DC
Gear Type	Helical Pinion Gearbox
Output Shaft	6mm diameter with flat

Key Features

• Helical Pinion Design: Reduces backlash and noise by distributing loads across multiple gear teeth, delivering smooth power transmission with minimal vibration for precision applications
• Metal Construction: Robust metal housing with sealed bearings provides superior durability, heat dissipation, and protection against environmental contaminants in demanding industrial environments
• Compact Form Factor: 37mm diameter by 50mm length enables integration into space-constrained robotic platforms and mobile systems without compromising mechanical performance
• High Torque Output: Integrated gearbox provides significant mechanical advantage, delivering substantial torque suitable for driving wheels, lifting mechanisms, and rotating loads
• Direct Coupling: Motor shaft directly couples to gearbox output, eliminating separate coupling components and reducing assembly complexity and potential failure points

Applications and Use Cases

• Mobile Robotics: Drive motor for wheeled robots, autonomous vehicles, and ROS-based platforms requiring reliable torque delivery with minimal backlash for precise motion control
• Conveyor Systems: Industrial conveyor belt drive applications where smooth, quiet operation and consistent torque are critical for material handling and production line efficiency
• Robotic Manipulators: Joint actuation in robotic arms and articulated mechanisms where helical gearing reduces noise and vibration during repetitive positioning tasks
• Automation Equipment: Precision machinery including automated dispensers, sorting systems, and assembly line equipment requiring compact, high-torque actuation with low backlash
• Educational Robotics: STEM education platforms and university robotics competitions where students build wheeled robots and require reliable, documented motor specifications

How to Use

Before installation, verify the motor voltage rating matches your power supply to prevent damage. The Pololu 4747/4748 features a 6mm diameter output shaft with a flat surface for secure coupling to wheels, pulleys, or other mechanical loads. Secure the motor housing using the mounting tabs or threaded holes provided, ensuring proper alignment with driven components to minimize vibration and premature bearing wear. Apply 12V DC power with correct polarity to the motor leads to verify rotation direction before final system integration.

For optimal performance, implement current limiting in your power supply circuit to prevent inrush currents that could damage the motor windings during startup. The helical gearbox requires no special lubrication maintenance under normal operating conditions, but inspect the output shaft seal periodically if operating in dusty or wet environments. When driving wheels or high-inertia loads, use appropriate motor controllers with PWM capability to regulate speed and prevent stalling. Monitor motor temperature during extended operation, as continuous high-current draw may cause thermal stress; ensure adequate ventilation around the motor housing for heat dissipation.

Frequently Asked Questions

What is the difference between helical pinion and spur gear designs in this motor?

Helical pinion gears have angled teeth that engage gradually across the gear face, distributing loads over multiple teeth simultaneously. This design reduces backlash, noise, and vibration compared to spur gears where teeth engage suddenly. For robotics applications requiring smooth motion and precise positioning, the helical design provides superior performance with extended component lifespan.

What is the maximum continuous current draw of this gearmotor?

The Pololu 4747/4748 typically draws 300-400mA at nominal 12V under no-load conditions, with stall current reaching 5-6A when the output shaft is mechanically blocked. Your power supply should be rated for at least 10A to safely handle startup transients and prevent voltage sag. Use a motor controller with current limiting to protect the motor from excessive current during acceleration phases.

Can I operate this motor at voltages other than 12V?

Operating outside the 12V nominal rating is not recommended and will void the warranty. Lower voltages reduce torque output and may cause insufficient speed for your application, while higher voltages accelerate motor wear and increase fire risk. If your system requires different voltage levels, use a DC-DC converter to maintain proper 12V supply to the motor.

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.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy Pololu 4747 / 4748 Metal Gearmotor 37Dx50L mm 12V - Helical Pinion Online in India

Purchase the Pololu 4747 / 4748 Metal Gearmotor 37Dx50L mm 12V - Helical Pinion online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Pololu 4747 / 4748 Metal Gearmotor 37Dx50L mm 12V - Helical Pinion with fast shipping and expert support.

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