Oring 5.28x1.78 NBR 70 Shore A

What Is the Oring 5.28x1.78 NBR 70 Shore A 100 pcs?

The Oring 5.28x1.78 NBR 70 Shore A is a precision rubber sealing ring manufactured from NBR (Nitrile Butadiene Rubber, Buna-N). The dimensions 5.28x1.78 mm refer to an inside diameter of 5.28 mm and a cross-section of 1.78 mm. The 100-piece pack is designed for maintenance departments, repair workshops, service technicians and small production runs, providing a practical quantity of sealing rings for routine servicing, technical repairs and maintenance without purchasing industrial bulk packaging.

Applications in Workshops and Maintenance

The Oring 5.28x1.78 NBR 70 Shore A is commonly used in:

• Hydraulic systems
• Pneumatic systems
• Pumps
• Valves
• Hydraulic cylinders
• Compressors
• Gearboxes
• Industrial machinery
• Agricultural equipment
• Workshop equipment
• Technical service operations
• Small production batches

It is widely used during preventive maintenance, machine servicing and equipment repairs.

Technical Specification

Product Type: Oring

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

Hardness: 70 Shore A

Inside Diameter: 5.28 mm

Cross Section: 1.78 mm

Colour: Black

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

Chemical Resistance:

• Mineral oils
• Hydraulic oils
• Lubricating greases
• Petroleum-based fuels
• Mineral oil-based industrial fluids

Packaging: 100 pcs

Why Choose NBR 70 Shore A?

NBR (Buna-N) is the industry standard material for general-purpose sealing applications due to its excellent resistance to petroleum-based media and good mechanical properties.

Key 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
• Excellent value for maintenance applications

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

Hydraulic and Pneumatic Systems

NBR 70 Shore A Orings are widely used in hydraulic and pneumatic equipment where reliable sealing against mineral oil-based hydraulic fluids and compressed air is required. Their elasticity helps prevent pressure loss and fluid leakage while ensuring dependable long-term performance.

Machine Repair and Maintenance

The 100-piece package is intended for technicians who regularly service machinery and industrial equipment. It provides an adequate stock of commonly used sealing rings for routine repairs and scheduled maintenance while avoiding unnecessary storage of industrial quantities.

Benefits of the 100-Piece Pack

The 100-piece pack allows you to:

• Keep frequently used seals readily available
• Reduce repeated purchasing
• Lower the cost per sealing ring
• Organize maintenance inventory efficiently
• Support routine repair work and small production projects

Frequently Asked Questions (FAQ)

Is the 100-piece pack suitable for workshops?

Yes. It is an excellent choice for repair workshops, maintenance departments and routine servicing.

Is NBR suitable for hydraulic oil?

Yes. NBR offers excellent resistance to mineral oil-based hydraulic fluids used in most hydraulic systems.

Can this Oring be used in pneumatic equipment?

Yes. It is commonly used in pneumatic valves, cylinders and compressed air systems.

Are larger package sizes available?

Yes. Larger packaging options are available for industrial users with higher consumption requirements.

How should NBR Orings be stored?

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

Frequently Asked Questions from Service Technicians

Is 70 Shore A the standard hardness?

Yes. It is the most widely specified hardness for hydraulic, pneumatic and general industrial sealing applications.

Can NBR be used for dynamic sealing?

Yes. When correctly selected and installed, NBR performs well in both static and dynamic sealing applications.

Can this Oring be installed in hydraulic pumps?

Yes. It is commonly used in pumps, valves, cylinders and hydraulic components.

Is NBR resistant to lubricating grease?

Yes. NBR provides excellent compatibility with most mineral oil-based greases and lubricants.

Are other sizes available?

Yes. A comprehensive range of NBR Orings is available in numerous inside diameters and cross-sections.