Description
SIDA Nylon Threaded Rods are manufactured from virgin polyamide resin (PA6 or PA66) using precision extrusion and thread-rolling processes. This ensures consistent thread geometry, high tensile strength, and reliable performance in electrical insulation applications.
Key Performance Characteristics:
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Electrical Insulation: Superior dielectric properties with volume resistivity exceeding 10¹⁴ Ω·cm and dielectric strength >15 kV/mm, meeting GB/T 1408 & IEC 60243 standards.
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Mechanical Strength: Tensile strength of 80-85 MPa and flexural modulus of 2,800 MPa provide robust load-bearing capacity for structural applications.
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Thermal Stability: Continuous operating temperature range of -40°C to +120°C (PA66) with short-term peaks up to 150°C. Low thermal conductivity prevents heat transfer.
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Chemical Resistance: Excellent resistance to oils, greases, aliphatic hydrocarbons, and most common solvents. Suitable for transformer oil immersion per GB/T 1409 compatibility testing.
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Corrosion-Free: Unlike metal fasteners, nylon eliminates galvanic corrosion and is ideal for marine, chemical, and outdoor applications.
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Lightweight: Approximately 1/7th the weight of steel, reducing overall equipment load.
Manufacturing & Quality Control: Each batch undergoes rigorous testing per GB/T and ASTM standards for dimensional accuracy, mechanical properties, and electrical performance. Threads are formed using cold-rolling to preserve material integrity and strength. RoHS and REACH compliant.
|
NO |
Test Item |
Unit |
Requirement |
Test result |
Test Way |
|
|
1 |
Bending strength |
MPa |
≥100 |
185 |
GB/T5134-1985 |
|
|
2 |
Thermal stability (150℃/24h, apply 5MPa pressure) |
– |
no deformation |
No deformation |
visual inspection |
|
|
3 |
Withstand voltage (10kV/mm,1min) |
– |
pass |
pass |
GB/T1408.1-2006 |
|
|
4 |
Dielectric constant (power frequency) |
under normal conditions |
– |
≤4.5 |
4.3 |
GB/T1409-2006 |
|
105°C, 25″ transformer oil submerged for 72 hours under normal conditions |
≤4.5 |
4.2 |
||||
|
tr 105°C, 25″ ansformer oil immersed for 168 hours under normal conditions |
≤4.5 |
4.0 |
||||
|
5 |
volume resistivity |
Ω•m |
1*1012 |
3.76*1013 |
GB/T1410-2006 |
|
|
6 |
Surface resistivity |
Ω |
1*1012 |
1.09*1012 |
||
|
7 |
Compatibility (105°C, after immersing in 25″ transformer oil for 168h, the change value of oil dielectric loss factor measured at 90°C) |
– |
– |
+2.5*10-4 |
GB/T 1409-2006 |
|
|
8 |
Tensile Strength |
MPa |
≥50 |
82.8 |
GB/T5134-1985 |
|
|
9 |
Tensile failure load |
N |
≥8000 |
12737 |
||
Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.
Application Scenarios
1. Electrical Switchgear & Control Panels
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Non-conductive busbar supports and spacer bolts
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Prevents arc tracking and short circuits in MV/LV panels
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Meets IEC 61439 insulation requirements
2. Power Transformers
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Tie rods for coil clamping and core assembly
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Compatible with transformer oils (mineral oil, FR3) per GB/T 1409
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Withstands vacuum drying processes up to 120°C
3. Renewable Energy Systems
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Solar panel mounting and inverter connections
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Wind turbine nacelle insulation fasteners
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UV-stabilized grades available for outdoor use
4. Chemical & Petrochemical Plants
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Corrosion-resistant fastening in aggressive environments
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Compatible with salts, alkalis, and hydrocarbons
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Replaces stainless steel in non-critical load applications
5. Railway & Transportation
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Electrical insulation in traction systems
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Vibration-resistant threaded rods for signaling equipment
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Low smoke/halogen-free options meet EN45545
6. Marine & Offshore
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Galvanic corrosion prevention in seawater environments
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Radar and communication equipment fastening
-
DNV-GL certified material grades available
Frequently Asked Questions (FAQ)
Q1: What is the difference between PA6 and PA66 nylon threaded rods? A: PA66 has higher tensile strength (82 MPa vs 75 MPa), better heat resistance (120°C vs 85°C continuous), and lower moisture absorption. PA6 offers better impact resistance and is more cost-effective. Choose PA66 for high-temperature transformer applications; PA6 for general-purpose insulation.
Q2: Can nylon threaded rods be used in oil-immersed transformers? A: Yes. Our PA66 rods are tested per GB/T 1409-2006 for transformer oil compatibility (168h @ 105°C). The dielectric loss factor change is <0.015, ensuring no oil contamination. We recommend PA66 over PA6 for continuous oil immersion above 80°C.
Q3: How do you cut and thread nylon rods without damaging them? A: Use sharp, fine-toothed saws (e.g., hacksaw with 24 TPI) at low speed to prevent melting. Deburr edges with a utility knife. For threading, use carbide-tipped dies with cutting oil. Avoid excessive torque during fastening – use washers to distribute load.
Q4: What is the maximum tightening torque for nylon threaded rods? A: Recommended torque is 30-50% of steel equivalents. For M12 rod: 8-12 Nm. Over-tightening causes creep. Use torque wrenches and consider thread-locking adhesives (e.g., nylon-safe anaerobic) for permanent assemblies.
Q5: Are UV-resistant grades available for outdoor applications? A: Yes. We offer black UV-stabilized PA66 with 2% carbon black additive, extending outdoor lifespan from 2 years to 10+ years. Meets ASTM G154 accelerated weathering tests. Standard natural nylon is not recommended for direct UV exposure.
Q6: What testing certificates do you provide? A: Each batch includes Material Test Report (MTR) per GB/T standards. Upon request: RoHS/REACH compliance certificate, UL94 flammability test report, dielectric strength test per GB/T 1408.1-2006. Third-party UL/CSA certification available for volume orders.