O-ring 10x2,5 NBR 70 ShA

What Is the O-Ring 10x2.5 NBR 90 Shore A?

The O-Ring 10x2.5 NBR 90 Shore A is a precision technical sealing ring manufactured from NBR (Nitrile Butadiene Rubber, Buna-N) with an inside diameter of 10 mm and a 2.5 mm cross section. Unlike standard 70 Shore A O-rings, the 90 Shore A version is designed for applications requiring greater resistance to high pressure, extrusion and mechanical loads. The 100-piece package is intended for workshops, maintenance departments, machine servicing and small-scale assembly operations where frequently used sealing components need to be readily available.

Why Choose NBR 90 Shore A?

90 Shore A NBR O-rings are selected for applications where increased hardness improves sealing performance.

Main advantages include:

• Higher resistance to extrusion
• Better performance under high pressure
• Excellent resistance to mineral oils
• Good compatibility with lubricating greases
• Good resistance to hydraulic fluids
• High abrasion resistance
• Improved dimensional stability under load

These properties make 90 Shore A O-rings particularly suitable for demanding hydraulic applications.

Technical Specification

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

Hardness: 90 Shore A

Inside Diameter: 10 mm

Cross Section: 2.5 mm

Profile: O-Ring

Colour: Black

Operating Temperature: Approximately -30°C to +100°C depending on the operating medium

Chemical Resistance:

• Mineral oils
• Lubricating greases
• Hydraulic fluids
• Many petroleum-based industrial fluids

Packaging: 100 pieces

Application: Static and dynamic sealing

Hydraulic and Pneumatic Applications

The 10x2.5 mm O-Ring is commonly used in:

• Hydraulic systems
• High-pressure hydraulic equipment
• Hydraulic pumps
• Hydraulic valves
• Hydraulic cylinders
• Pneumatic systems
• Pneumatic valves
• Industrial machinery
• Manufacturing equipment
• Industrial automation

The increased hardness helps the seal maintain its shape under demanding operating conditions.

Machine Service and Maintenance

The 100-piece package is an excellent choice for:

• Mechanical workshops
• Hydraulic repair services
• Pneumatic maintenance
• Industrial maintenance departments
• Machine repair companies
• Small production batches
• Equipment assembly and servicing

It provides a practical inventory level without requiring industrial bulk quantities.

How to Select the Correct O-Ring

Before installation, verify:

• Inside diameter
• Cross-section diameter
• Elastomer material
• Hardness
• Operating fluid
• Operating temperature
• System pressure
• Groove dimensions

90 Shore A O-rings are generally recommended for applications involving higher operating pressures and increased mechanical stress.

Why Choose NBR 90 Shore A O-Rings?

• Increased extrusion resistance
• Excellent oil and grease resistance
• High abrasion resistance
• Improved sealing stability
• Suitable for hydraulic systems
• Easy installation
• Reliable solution for machine maintenance

Frequently Asked Questions (FAQ)

What is the difference between 90 Shore A and 70 Shore A O-rings?

A 90 Shore A O-ring is harder and provides greater resistance to extrusion and deformation under higher operating pressures.

Is NBR 90 Shore A compatible with hydraulic oil?

Yes. NBR is designed for use with most mineral oil-based hydraulic fluids and lubricating greases.

Does the package contain 100 O-rings?

Yes. Each package contains 100 pieces.

Where is the 10x2.5 mm O-ring commonly used?

It is frequently installed in hydraulic valves, pumps, cylinders, industrial machinery and pneumatic equipment.

Is a 90 Shore A O-ring more difficult to install?

Yes. Because of its higher hardness, installation may require slightly greater force, but the seal provides improved resistance to mechanical deformation during operation.

Frequently Asked Questions from Service Engineers and Mechanics

When should I choose a 90 Shore A O-ring instead of 70 Shore A?

When the sealing application involves higher pressure or there is a greater risk of seal extrusion into the clearance gap.

Is the 90 Shore A version suitable for hydraulic systems?

Yes. It is widely used in demanding hydraulic applications operating under higher pressure.

Can this O-ring be used in hydraulic valves?

Yes, provided the groove dimensions and equipment specifications require a 10x2.5 mm seal.

Should the O-ring be lubricated before installation?

Yes. Using a lubricant compatible with the operating medium helps prevent installation damage and improves sealing performance.

How should NBR O-rings be stored?

Store them in a cool, dry environment away from direct sunlight, ozone and excessive heat to preserve their sealing properties.