46.2X5.3 NBR 70 ShA O-Ring

What are the 46.2X5.3 NBR 70 ShA O-Rings?

The 46.2X5.3 NBR 70 ShA O-Rings are precision metric sealing rings supplied in packs of 100 pieces, designed for professional industrial use. Manufactured from NBR (Nitrile Butadiene Rubber) with a hardness of 70 Shore A, these O-rings provide reliable static and dynamic sealing in hydraulic systems, pneumatic equipment, industrial machinery and OEM applications. With an inside diameter of 46.2 mm and a 5.3 mm cross-section, they offer dependable sealing performance in systems operating with mineral oils, lubricating greases and many petroleum-based fluids. The economical 100-piece packaging makes them an excellent choice for production facilities, maintenance departments and industrial service companies.

Design and Construction

Each O-ring is precision moulded with a circular cross-section to ensure effective sealing when installed in a correctly designed groove.

Key features include:

• Metric dimensions
• NBR (Nitrile Butadiene Rubber) material
• 70 Shore A hardness
• Round sealing profile
• Uniform elastomer structure
• Pack of 100 identical O-rings

Bulk packaging simplifies inventory management while ensuring a consistent supply of identical sealing components for production and maintenance operations.

Technical Specification

Manufacturer: GRN

Product Type: Metric O-Ring

Part Number: 46.2X5.3 NBR 70 ShA

Material: NBR (Nitrile Butadiene Rubber)

Hardness: 70 Shore A

Inside Diameter: 46.2 mm

Cross Section: 5.3 mm

Profile: Round

Colour: Black

Packaging: 100 pieces

How Does an O-Ring Work?

An O-ring seals by elastic compression.

When installed inside a sealing groove, the elastomer is compressed between two mating surfaces, creating continuous contact pressure that prevents leakage of liquids or gases.

As operating pressure increases, the sealing force also increases, improving sealing efficiency. This self-energizing sealing principle has made O-rings the most widely used sealing components in industrial engineering.

Why Choose NBR 70 Shore A?

NBR remains the preferred material for many industrial sealing applications because it offers an excellent balance of durability, flexibility and chemical compatibility.

Key advantages include:

• Excellent resistance to mineral oils
• Good compatibility with lubricating greases
• Good abrasion resistance
• High mechanical strength
• Cost-effective sealing solution
• Reliable long-term performance
• Industry-standard hardness

Selecting the Correct O-Ring

Correct O-ring selection should consider:

• Inside diameter
• Cross-section
• Material
• Hardness
• Operating medium
• Working pressure
• Operating temperature
• Static or dynamic application
• Groove dimensions
• Equipment manufacturer's specifications

Choosing the correct material and dimensions is essential for achieving reliable sealing and maximum service life.

Installation Recommendations

For optimum sealing performance:

• Thoroughly clean the sealing groove.
• Remove burrs and sharp edges.
• Lubricate the O-ring if recommended.
• Avoid twisting during installation.
• Do not overstretch the seal.
• Inspect sealing surfaces before assembly.

Proper installation significantly reduces the risk of premature seal failure.

Common Causes of O-Ring Failure

Typical causes include:

• Incorrect dimensions
• Wrong material selection
• Mechanical damage during installation
• Excessive stretching
• Elastomer ageing
• Contaminated sealing surfaces
• Improper groove design
• Operating outside recommended conditions

Correct engineering practices help maximize sealing reliability.

Industrial Applications

The 46.2X5.3 NBR 70 ShA O-Rings are suitable for equipment designed for this specific metric size.

Typical applications include:

• Hydraulic systems
• Pneumatic systems
• Pumps
• Valves
• Hydraulic cylinders
• Industrial machinery
• Manufacturing equipment
• Agricultural machinery
• OEM production
• Industrial MRO maintenance

Always verify compatibility with the equipment manufacturer's technical documentation.

OEM, Production and Industrial Maintenance

The 100-piece pack is intended for organizations that routinely use sealing components during production or maintenance.

Ideal for:

• OEM manufacturers
• Industrial maintenance departments
• Service workshops
• Machine rebuilding
• Preventive maintenance
• Spare parts inventory management

Bulk packaging helps reduce procurement frequency, improves stock control and ensures the availability of identical sealing components whenever required.

Why Engineers Choose This Product

• Pack of 100 identical O-rings
• Standard metric dimensions
• NBR material for oil and grease applications
• Industry-standard 70 Shore A hardness
• Reliable static and dynamic sealing
• Easy installation and replacement
• Suitable for OEM production and MRO
• Long operational service life

Frequently Asked Questions (FAQ)

How many O-rings are included in the package?

Each package contains 100 pieces.

What does 70 Shore A mean?

It is the hardness rating of the NBR elastomer measured on the Shore A hardness scale.

Can these O-rings be used with mineral oils?

Yes. NBR is widely used in systems operating with mineral oils and lubricating greases.

Are these O-rings suitable for hydraulic systems?

Yes, provided the dimensions and operating conditions match the equipment manufacturer's specifications.

Can they be used for dynamic sealing?

Yes. NBR 70 Shore A O-rings are suitable for many dynamic sealing applications when correctly designed and installed.

Who is this packaging intended for?

The 100-piece package is designed for OEM manufacturers, industrial maintenance departments, production facilities, workshops and service companies requiring multiple identical sealing rings.