Oring 365x5 NBR 70 Shore A

What Is the Oring 365x5 NBR 70 Shore A?

The Oring 365x5 NBR 70 Shore A is a precision rubber sealing ring manufactured from NBR (Nitrile Butadiene Rubber, Buna-N). The dimensions 365x5 mm indicate an inside diameter of 365 mm and a cross-section of 5 mm. With a hardness of 70 Shore A, it provides reliable sealing in hydraulic, pneumatic and mechanical systems operating with mineral oils, lubricating greases and hydraulic fluids. NBR is one of the most widely used sealing materials thanks to its excellent balance of flexibility, wear resistance and mechanical durability.

Applications

The Oring 365x5 NBR 70 Shore A is commonly used in:

• Hydraulic systems
• Pneumatic systems
• Pumps
• Valves
• Hydraulic cylinders
• Compressors
• Gearboxes
• Industrial machinery
• Agricultural equipment
• Construction machinery
• Technical fittings
• OEM equipment

Technical Specification

Product Type: Oring

Material: NBR (Nitrile Butadiene Rubber, Buna-N)

Inside Diameter: 365 mm

Cross Section: 5 mm

Colour: Black

Hardness: 70 Shore A

Operating Temperature: Approximately -30°C to +100°C

Chemical Resistance:

• Mineral oils
• Hydraulic oils
• Lubricating greases
• Petroleum-based fuels
• Industrial lubricants
• Many mineral oil-based process fluids

Why Choose NBR 70 Shore A?

NBR (Buna-N) is the standard elastomer used for general industrial sealing applications.

Its main advantages include:

• Excellent resistance to mineral oils
• High abrasion resistance
• Good mechanical strength
• Reliable static and dynamic sealing
• Low compression set
• Easy installation
• Long service life under normal operating conditions

The 70 Shore A hardness provides an ideal balance between elasticity and durability for most industrial sealing applications.

Hydraulic and Pneumatic Applications

The Oring 365x5 NBR 70 Shore A is widely used in hydraulic and pneumatic equipment where dependable sealing against mineral oil-based hydraulic fluids and compressed air is required. Its flexibility and wear resistance help maintain system pressure while reducing the risk of leakage during long-term operation.

Typical Industrial Applications

The 365x5 mm NBR Oring is widely used in:

• Mechanical engineering
• Hydraulic equipment
• Pneumatic systems
• Industrial pumps
• Valves
• Manufacturing machinery
• Agricultural machinery
• Automotive applications
• Machine maintenance
• OEM assemblies

Installation Recommendations

Before installation, verify:

• Groove dimensions
• Sealing surface condition
• Material compatibility with the operating medium
• Operating temperature
• Working pressure
• Proper assembly lubrication

Correct installation helps ensure reliable sealing performance and extended service life.

Frequently Asked Questions (FAQ)

What is the Oring 365x5 NBR 70 Shore A used for?

It is primarily used for sealing hydraulic systems, pneumatic equipment and industrial machinery.

Is NBR resistant to hydraulic oil?

Yes. NBR offers excellent resistance to mineral oil-based hydraulic fluids and lubricating greases.

Can this Oring be used with lubricating grease?

Yes. It performs very well with most mineral oil-based greases and industrial lubricants.

What does 70 Shore A mean?

It is the standard hardness used for most hydraulic, pneumatic and mechanical sealing applications, providing an excellent balance between flexibility and wear resistance.

How should NBR Orings be stored?

Store them in a cool, dry place away from direct sunlight, ozone and excessive heat.