The RS PRO nitrile rubber NBR Oring Cord 8 mm diameter 85 m is a high-performance sealing solution designed for demanding industrial environments. This reinforced cord offers reliable elasticity, chemical resistance, and dimensional stability, making it ideal for dynamic and static sealing applications across many sectors.
Engineered to meet precision specifications, this 8 mm diameter product is supplied in a convenient 85 m length to support efficient project planning and reduced changeover downtime. The following sections detail its material properties, applications, installation guidelines, and answers to common user questions.
| Specification | Value | Unit | Notes |
|---|---|---|---|
| Material | Nitrile Rubber (NBR) | - | Excellent oil and fuel resistance |
| Diameter | 8 | mm | Standard size for many gland and flange seals |
| Length | 85 | m | Single continuous roll for reduced joints |
| Core Type | Cord | - | Reinforced for improved dimensional control |
| Temperature Range | -30 | to +120 | °C, depending on grade and media |
Material Composition And Chemical Resistance
Nitrile rubber (NBR) is the base polymer for this Oring cord, chosen for its outstanding resistance to oils, fuels, and a wide range of non-polar chemicals. The polymer chains provide robust sealing performance in environments where mineral and synthetic oils are prevalent.
The 8 mm diameter cord is designed to maintain elasticity and compression set resistance even when exposed to aggressive media common in hydraulic, pneumatic, and fuel systems. This makes it a trusted choice for both maintenance and new build applications.
Dimensional Specifications And Tolerances
Key Dimensional Parameters
The 8 mm diameter is selected to suit standard groove designs and established sealing standards. Precise control of cord dimensions ensures consistent squeeze and sealing effectiveness across varied operating conditions.
Manufactured to tight tolerances, the cord supports reliable performance in both dynamic motion seals and static flange gasket configurations, reducing the risk of leaks and extending equipment service life.
Applications Across Industry And Maintenance
The RS PRO NBR Oring Cord is used in sectors such as manufacturing, process engineering, automotive, and general maintenance. Typical applications include piston seals, rod seals, face gaskets, and custom molded profiles where a reliable sealing solution is required.
The 85 m roll format is ideal for facilities that require longer uncut lengths to minimize splicing, streamline inventory, and ensure uninterrupted production during repairs or assembly operations.
Installation Guidelines And Best Practices
Proper installation is essential to achieve optimal sealing performance and service life. Before fitting, inspect the cord and groove for cuts, debris, and surface damage that could compromise the seal.
- Ensure the groove radius and surface finish are compatible with the 8 mm cord diameter.
- Use suitable installation tools to avoid twisting or overstretching the NBR material.
- Apply correct assembly lubricants that are compatible with nitrile rubber.
- Verify gland tightening torque to prevent distortion of the sealed enclosure.
Operational Limits And Long Term Performance
The combination of nitrile rubber and the reinforced cord structure delivers dependable sealing across a broad temperature and pressure range, supporting long-term reliability in industrial plant operations and field maintenance scenarios.
- Confirm compatibility between NBR and process media before use.
- Verify groove dimensions and tolerances match the 8 mm cord size.
- Perform routine inspections for swelling, cracking, or wear during maintenance cycles.
- Select installation tools and lubricants that preserve material integrity.
- Plan roll storage to protect against environmental and chemical degradation.
FAQ
Reader questions
What types of media is this nitrile Oring cord suitable for sealing?
It performs well with mineral oils, hydraulic fluids, fuels, and water-based solutions, but is not recommended for strong acids, ketones, or high-polarity solvents without chemical compatibility verification.
Can this 8 mm cord be used in high dynamic motion sealing applications?
Yes, the reinforced cord is suitable for many dynamic applications, provided groove design, gland force, and speed are aligned with NBR material limits and expected pressure differentials.
How should I store the 85 m roll before installation to preserve material properties?
Store the roll in a cool, dry environment away from direct sunlight, ozone sources, and contact with oils or solvents to prevent premature aging of the nitrile rubber.
Does the 85 m length include packaging, or is it usable sealing length only?
The specified 85 m refers to the usable sealing length of the cord on the roll; minor variations may occur due to packaging but do not affect the stated length of available material.