Overview
Nylon gears are robust polymer gearing components manufactured from polyamide (PA) resins, most commonly PA66 and PA6, widely recognized for their excellent mechanical strength, impact resistance, and wear properties. These industrial-grade gears are designed for heavy-duty applications in material handling, conveyor systems, industrial machinery, and automotive components where durability and reliable performance under demanding conditions are essential. OrroMFG produces high-quality nylon gears using precision CNC machining and injection molding techniques, delivering robust, long-lasting gearing solutions for industrial applications.
Nylon gears offer significant advantages over metal gears including reduced weight, inherent corrosion resistance, noise damping, and the ability to operate with minimal lubrication. They are particularly valued for their excellent wear resistance and high impact strength, making them ideal for applications involving shock loads and frequent start-stop cycles. Our nylon gear product line includes various formulations including virgin nylon, glass-filled nylon (for enhanced strength and stiffness), and molybdenum disulfide (MoS2) filled nylon (for improved wear resistance and dry-running performance). We manufacture spur gears, helical gears, bevel gears, worm gears, sprockets, and rack gears in a wide range of sizes, from small appliance gears to large-diameter industrial gears over 500mm in diameter.
Key Features
- Excellent Impact Resistance: High toughness and impact strength, able to withstand shock loads and sudden load reversals without fracture.
- Superior Wear Resistance: Good sliding properties and wear resistance, especially when lubricated or compounded with wear-reducing additives.
- High Mechanical Strength: Good tensile strength and fatigue resistance for medium-to-heavy load power transmission.
- Noise and Vibration Damping: Absorbs vibration and reduces operating noise compared to metal gears.
- Lightweight: Approximately 85% lighter than steel, reducing inertia and enabling higher acceleration rates.
- Corrosion Resistant: Resistant to many chemicals, oils, and fuels; does not rust or corrode in wet environments.
Material Specifications
| Property | Nylon PA66 | Nylon PA6 | 30% Glass-Filled PA66 | MoS2-Filled PA66 |
|---|---|---|---|---|
| Density (g/cm³) | 1.13 - 1.15 | 1.12 - 1.14 | 1.35 - 1.40 | 1.14 - 1.18 |
| Tensile Strength (MPa) | 75 - 85 | 65 - 75 | 150 - 180 | 70 - 80 |
| Tensile Modulus (GPa) | 2.8 - 3.2 | 2.4 - 2.8 | 7.0 - 9.0 | 2.6 - 3.0 |
| Flexural Strength (MPa) | 100 - 120 | 85 - 100 | 220 - 260 | 95 - 110 |
| Flexural Modulus (GPa) | 2.6 - 3.0 | 2.2 - 2.6 | 6.5 - 8.5 | 2.4 - 2.8 |
| HDT at 1.8 MPa (°C) | 70 - 80 | 60 - 70 | 200 - 220 | 70 - 80 |
| Continuous Service Temp (°C) | 80 - 120 | 70 - 110 | 120 - 150 | 80 - 120 |
| Hardness (Rockwell M) | 70 - 80 | 65 - 75 | 95 - 105 | 70 - 80 |
| Izod Impact (kJ/m²) | 50 - 80 | 40 - 70 | 10 - 15 | 40 - 70 |
| Coefficient of Friction | 0.20 - 0.35 | 0.20 - 0.35 | 0.25 - 0.40 | 0.10 - 0.20 |
| Water Absorption (24h, %) | 1.0 - 1.5 | 1.5 - 2.0 | 0.5 - 1.0 | 0.8 - 1.3 |
Applications
Industrial Machinery and Equipment
Nylon gears are widely used in industrial machinery including machine tools, textile machines, printing presses, packaging equipment, and assembly machinery. They are commonly found in gearboxes, drive trains, feed mechanisms, and speed reducers. Their excellent wear resistance and ability to handle shock loads make them well-suited for heavy industrial equipment operating in demanding production environments.
Material Handling and Conveyor Systems
In material handling applications, nylon gears and sprockets drive conveyor systems, elevators, escalators, and warehouse automation equipment. They are particularly valued for their corrosion resistance in wet or humid environments such as food processing plants, bottling lines, and distribution centers. Nylon sprockets for roller chain and modular belt conveyors are among the most common applications.
Automotive Industry
Nylon gears are used in various automotive applications including engine components, transmission systems, windshield wiper mechanisms, window regulators, seat adjusters, and HVAC systems. Their lightweight nature contributes to fuel efficiency, while their noise damping properties improve passenger comfort. Glass-filled nylon gears are increasingly used in engine timing systems and balance shaft drives.
Agricultural Equipment
In agricultural machinery, nylon gears and sprockets are used in harvesters, tractors, irrigation systems, and feeding equipment. They provide reliable performance in dusty, dirty, and moisture-laden environments where metal gears would be prone to corrosion and wear. Nylon’s ability to run with minimal lubrication reduces maintenance requirements in field operations.
Marine and Offshore
Nylon gears are suitable for marine applications including winches, pumps, deck equipment, and propulsion systems where corrosion resistance to saltwater is important. They are also used in offshore oil and gas equipment for non-sparking and corrosion-resistant power transmission.
Operating Conditions
- Temperature Range: -40°C to +120°C (-40°F to +248°F) for unfilled nylon; up to 150°C for glass-filled grades
- PV Limit: Up to 3,000 bar·m/s with proper lubrication; up to 1,500 bar·m/s dry-running with MoS2-filled grades
- Torque Capacity: Up to 300 Nm depending on gear size, module, and material grade
- Speed Range: Up to 8,000 RPM for properly designed nylon gears with optimized tooth geometry
- Chemical Compatibility: Resistant to hydrocarbons, fuels, lubricants, solvents, alkalis, and salt solutions
- Not Recommended For: Strong acids, oxidizing agents, phenols, and long-term exposure to hot water above 80°C
- Moisture Effects: Absorbs moisture which increases impact resistance but slightly reduces strength and stiffness; dimensional changes should be accounted for in design
- Lubrication: Best with grease or oil lubrication for maximum performance and wear life; MoS2-filled grades suitable for dry operation
Material Comparison
| Material | Impact Strength | Wear Resistance | Temp Range | Moisture Sensitivity | Cost | Best For |
|---|---|---|---|---|---|---|
| Nylon PA66 | Excellent | Good | -40 to +120°C | High | Low-Medium | Industrial, material handling, shock loads |
| POM (Acetal) | Fair-Good | Good | -40 to +100°C | Low | Low-Medium | Dimensional stability, appliances, office equip |
| PEEK | Good | Excellent | -40 to +260°C | Very Low | Very High | High-temp, high-load, medical/semiconductor |
| Steel | Good | Excellent | -40 to +200°C+ | None | Medium | Heavy-duty, high-torque, precision |
| Cast Iron | Fair | Good | -40 to +250°C | None | Low-Medium | Heavy-duty, low-speed, high-torque |
| Brass | Fair | Good | -40 to +200°C | None | Medium-High | Low-friction, corrosion-resistant, marine |
Choose nylon gears when:
- High impact resistance and toughness are required for shock-loaded applications
- Cost-effective performance for medium-to-heavy industrial loads
- Corrosion resistance is needed in wet or chemical environments
- Noise reduction and vibration damping are important
- The application involves material handling, conveyors, or industrial machinery
- Good wear resistance with lubrication is acceptable
Customization Options
- Material Grades: PA66, PA6, PA12, PA46; 10-50% glass-filled; MoS2-filled; PTFE-filled; oil-filled; impact-modified; heat-stabilized; UV-stabilized; food-grade nylon
- Gear Types: Spur gears, helical gears, bevel gears, worm gears, rack and pinion, internal gears, sprockets, timing pulleys
- Size Range: Module 0.5 to Module 12; pitch diameter from 5mm to 800mm; bore sizes from 3mm to 150mm
- Quality Grades: AGMA Q6 to Q11; DIN 3962 Class 6 to 10; JIS N5 to N10
- Manufacturing Methods: CNC machined (prototyping and low volume), injection molded (high volume), cast nylon (large diameter)
- Hub Configurations: Plain bore, keyway, set screw holes, D-bore, splined bore, tapered bore, flanged hubs
- Reinforcement Options: Metal hub inserts, stainless steel core, and overmolded reinforcement for high-torque applications
- Tolerance Grades: IT6-IT9 for machined gears; IT8-IT11 for molded gears
- Surface Finishes: As-molded, machined, tumbled, and deburred surfaces
- Color Options: Natural (off-white/beige), black, gray, blue, and custom colors for identification or aesthetic purposes
- Secondary Operations: Insert molding, keyway broaching, threading, drilling, and assembly services
Quality Assurance
OrroMFG is committed to delivering nylon gears of consistent quality and reliability. Our ISO 9001:2015 certified quality management system governs all aspects of production from raw material procurement through final inspection and shipment. We source nylon resin from globally recognized suppliers and verify material properties upon receipt through melt flow testing, density measurement, and moisture content analysis.
For injection-molded nylon gears, we employ process monitoring and statistical process control (SPC) to ensure dimensional consistency across production runs. For CNC-machined and cast nylon gears, we use precision gear cutting equipment with in-process dimensional verification. Quality control inspections include tooth profile measurement using gear testers and coordinate measuring machines (CMM), pitch accuracy verification, runout measurement, tooth thickness checking, and backlash evaluation. We also perform mechanical testing including tensile strength, impact resistance, and wear testing for material validation. Application-specific testing such as fatigue cycling, load testing, and noise evaluation is available for critical components. All nylon gears are supplied with material test certificates, inspection reports, and full batch traceability documentation. Our quality assurance program ensures that every nylon gear we produce meets or exceeds customer specifications and industry standards for performance and durability.
