O-ring 85x2 NBR

O-Ring 85x2 NBR 70 ShA - Reliable Technical Sealing

The O-Ring 85x2 NBR 70 ShA is a precision-engineered rubber sealing ring designed for demanding industrial environments. The 85x2 dimension refers to an inner diameter of 85 mm and a 2 mm cross section, ensuring proper fit in standard groove designs used in machinery, housings and flange connections. This O-Ring functions primarily as a static seal and can also be used in light dynamic applications where limited movement occurs.

Manufactured from Nitrile Butadiene Rubber (NBR) with a hardness of 70 ShA, this technical seal offers high resistance to oils, greases and fuels commonly used in industrial systems. The balanced material properties combine flexibility with mechanical strength, ensuring reliable sealing performance and long service life.

Applications in Hydraulic and Industrial Systems

The O-Ring 85x2 NBR 70 ShA is widely used in hydraulic and pneumatic systems, as well as general industrial applications. It serves as:

• a rubber gasket in pumps and valves

• a sealing component in hydraulic cylinders

• a shaft and housing sealing ring

• a maintenance part for industrial machinery

Thanks to the high oil resistance of NBR, this O-Ring provides dependable sealing against leakage and contamination in systems operating with mineral oils and lubricants.

Technical Properties and Material Performance

NBR 70 ShA is one of the most commonly specified elastomers for industrial sealing. The O-Ring 85x2 offers:

• high resistance to oils, greases and fuels

• good abrasion resistance

• dimensional stability under proper compression

• reliable static sealing in industrial assemblies

The 70 ShA hardness ensures the correct balance between elasticity and durability, reducing the risk of deformation and premature wear.

FAQ - Frequently Asked Questions

1. What is the O-Ring 85x2 NBR 70 ShA used for?
It is used for static and light dynamic sealing in hydraulic, pneumatic and industrial machinery applications.

2. Is NBR 70 ShA resistant to oils and fuels?
Yes, NBR provides high resistance to mineral oils, greases and many petroleum-based fluids.

3. What is the typical temperature range?
Standard NBR 70 ShA O-Rings typically operate between approximately -30 C and +120 C, depending on operating conditions.

4. Can this O-Ring be used in hydraulic systems?
Yes, it is commonly applied in hydraulic and pneumatic sealing applications.

5. How do I select the correct O-Ring size?
Verify the inner diameter, cross section and operating parameters such as pressure, temperature and media compatibility.