Nylon Ball | PA6 and PA66 | 5mm to 310mm | Ball Valve, Check Valve, Pump
Nylon (Polyamide or PA) balls are tough, impact-resistant engineering spheres widely selected for their high mechanical strength, wear resistance, and self-lubricating properties. In mechanical systems, nylon balls serve as polyamide spheres, indexing detent balls, conveyor rollers, and non-return check valves. Unlike softer plastics, nylon possesses excellent structural toughness and resistance to abrasive wear, making it suitable for quiet-rolling conveyor elements and high-cycle pneumatic/hydraulic assemblies. Nylon has good chemical resistance to organic solvents, hydrocarbons, and oils, although it can absorb moisture over time, leading to minor dimensional swelling in wet environments.
Applications
Hydraulic Check Valves
Controls fluid flow in low-to-medium pressure hydraulic circuits, resisting oil degradation.
Conveyor Bearings
Used as light-duty rolling elements in industrial conveyor systems, operating quietly.
Pneumatic Detent Balls
Acts as spring-loaded indexing and detent elements in pneumatic controls and hand tools.
Toggle Valves
Integrated as sealing spheres in fast-acting mechanical toggle valves.
Flow Indicators
Bright natural or colored nylon balls serve as mechanical indicators in sight flow meters.
OEM Automotive Controls
Used in automotive gearboxes and seat slider mechanisms for smooth operation.
Features
High Wear Resistance
Outstanding resistance to friction and abrasive wear, ensuring a long life in mechanical systems.
Mechanical Toughness
High impact strength and resilience absorb shocks without cracking.
Self-Lubricating
Low friction properties reduce the need for external grease in sliding configurations.
Temperature Tolerance
Operates continuously from -40°C up to +110°C in dry conditions.
Good Solvent Resistance
Resistant to oils, grease, fuels, and organic solvents.
Noise Dampening
Absorbs vibration and operates quietly compared to metal spheres.
Precision Sphericity
Rigid structure allows centerless grinding to precise tolerances.
High Load Capacity
Better mechanical load limits than soft fluoropolymers like PTFE.
Technical Specifications
| Property | Value |
|---|---|
| Material | Nylon PA6 / PA66 (Polyamide) |
| Diameter Range | 5mm – 310mm |
| Grade | ISO 3290 Grade G10 |
| Temperature Range | -40°C to +120°C |
| Tensile Strength | 70 – 85 MPa |
| Specific Gravity | 1.13 – 1.15 g/cm³ |
| Chemical Resistance | Oils, fuels, greases, alkalis (not strong acids) |
| Color | Natural white / Black |
| Friction Coefficient | Low (self-lubricating) |
| Export Markets | UAE, Germany, USA, Japan, Singapore, Brazil, Turkey, Middle East |
Available sizes
We manufacture nylon balls in standard metric and fractional sizes. The following table showcases standard diameters.
| Size | Metric | Inch | Tolerance |
|---|---|---|---|
| 1/4″ | 6.00 mm | 0.250″ | ±0.03 mm |
| 3/8″ | 9.52 mm | 0.375″ | ±0.03 mm |
| 1/2″ | 12.70 mm | 0.500″ | ±0.04 mm |
| 3/4″ | 19.05 mm | 0.750″ | ±0.04 mm |
| 1″ | 25.40 mm | 1.000″ | ±0.05 mm |
| 1-1/2″ | 38.10 mm | 1.500″ | ±0.08 mm |
| 2″ | 50.80 mm | 2.000″ | ±0.10 mm |
Manufacturing Process
Material Selection
We utilize virgin Polyamide 6 (PA6) or Polyamide 66 (PA66) resin, depending on moisture limits.
Extrusion/Injection
The nylon resin is extruded into solid rods or injection-molded into preform blanks.
Annealing
Blanks undergo thermal annealing to relieve internal stress, ensuring they do not warp during grinding.
Precision Grinding
Centerless grinding machinery shapes and polishes the balls to tight roundness and surface quality.
Quality Audit
Spheres are checked for diameter and sphericity using digital gauges and optical instruments.
Material comparison
Compare Nylon (PA) properties against PTFE to choose the correct material for your assembly.
| Characteristic | Nylon | PTFE |
|---|---|---|
| Wear Resistance | Excellent (high toughness and abrasion resistance) | Moderate (softer, wears faster under high cycles) |
| Moisture Absorption | Moderate (absorbs water, causing minor swelling) | Zero (completely hydrophobic and dimensionally stable) |
| Maximum Operating Temp | Up to +110°C continuous | Up to +260°C continuous |
| Dry Friction Coefficient | Moderate (0.25 - 0.35) | Extremely Low (0.04 - 0.10) |
Compliance & Standards
IEC registered. ISO 3290 Grade G10. PA6 and PA66 grades available. Note: for applications involving strong acids, wet dimensional-critical environments, or temperatures above +120°C, PEEK Balls or PTFE Balls are recommended — both available from HEMSUN in 5mm to 310mm range. Regular export to UAE, Germany, USA, Japan, Singapore, Brazil, Turkey, and Middle East.
Frequently Asked Questions
What is the difference between PA6 and PA66 Nylon Balls?
PA66 Nylon Balls have slightly higher temperature resistance and stiffness than PA6. PA6 Nylon Balls have better impact resistance and slightly higher moisture absorption. For most valve and check valve applications, PA66 is preferred. Both grades are available from HEMSUN in 5mm to 310mm diameter.
What is the largest Nylon Ball you manufacture?
We manufacture Nylon PA6 and PA66 Balls up to 310mm diameter — one of the widest size ranges for Nylon Balls available from India.
When should I choose a PEEK Ball over a Nylon Ball?
Choose PEEK Ball when: temperature exceeds +120°C, process media includes strong acids or alkalis, dimensional stability in wet environments is critical, or mechanical loads are high (PEEK tensile ~100 MPa vs Nylon ~80 MPa). Nylon Balls are more cost-effective for moderate-duty, ambient-temperature applications.
What is the difference between Nylon 6 and Nylon 66?
Nylon 66 offers higher mechanical hardness, stiffness, and heat resistance, whereas Nylon 6 has better impact strength and toughness, though it absorbs slightly more moisture.
Do nylon balls absorb water?
Yes. Nylon is hygroscopic and can absorb up to 2.5% to 8% water depending on humidity. This absorption causes minor dimensional expansion (swelling).
Are nylon balls resistant to acids?
Nylon has poor resistance to concentrated mineral acids and oxidizing agents, but it has excellent resistance to organic solvents, oils, and alkalis.
Can they operate without lubrication?
Yes. Polyamides are self-lubricating, making them excellent for dry-running bearings and low-speed slider mechanisms.
What colors are available for nylon balls?
Our standard nylon balls are natural off-white. We can supply custom dyed colors for visual identification in volume orders.
How do you check for internal voids?
We run density verification tests and sample cutting inspection to ensure our molded preforms are solid and free of internal voids.
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