O-ring 120x7 NBR

Applications of the 120x7 NBR O-Ring

The 120x7 O-ring NBR 70 Shore A is a precision industrial sealing ring designed for reliable static sealing in a wide range of mechanical and industrial assemblies. With an inner diameter of 120 mm and a 7 mm cross-section, this O-ring is commonly used in housings, flanges, covers, cylinders, and grooves where consistent sealing pressure and dimensional stability are required.

This rubber gasket is widely applied in hydraulic and pneumatic applications, industrial machinery, power units, pumps, valves, and maintenance operations. Its standardized dimensions make it suitable for OEM production as well as replacement use in industrial systems.

NBR Material Advantages and High Durability

Manufactured from NBR (Nitrile Butadiene Rubber), this O-ring offers excellent chemical resistance to mineral oils, lubricating greases, fuels, and many industrial fluids. NBR is one of the most commonly specified materials for technical sealing components due to its balanced performance, cost efficiency, and long service life.

The hardness of 70 Shore A provides an optimal balance between elasticity and mechanical strength. This ensures effective sealing under moderate pressure while minimizing the risk of permanent deformation. As a result, the O-ring maintains sealing integrity over extended operating periods, even in demanding industrial environments.

Technical Data

• Product type: O-ring / rubber seal / industrial sealing ring

• Material: NBR (nitrile rubber)

• Hardness: 70 Shore A

• Inner diameter: 120 mm

• Cross-section: 7 mm

• Sealing function: static sealing

• Resistance: oils, grease, fuels

• Typical use: hydraulic and pneumatic applications, industrial machinery

FAQ - Frequently Asked Questions

What is the 120x7 NBR O-ring used for?
It is used for static sealing in industrial housings, flanges, hydraulic and pneumatic systems.

Is NBR suitable for oil and grease exposure?
Yes, NBR provides very good resistance to mineral oils, greases, and many industrial fluids.

What does 70 Shore A hardness mean?
It indicates a standard hardness offering a balance of flexibility and durability for most industrial sealing applications.

Can this O-ring be used in hydraulic systems?
Yes, it is commonly used in hydraulic and pneumatic installations as a reliable rubber seal.

How do I select the correct O-ring size?
Choose the correct inner diameter, cross-section, material, and hardness based on groove dimensions and operating conditions.