NBR O-Ring 63x2.5 mm 70 ShA

NBR O-Ring 63x2.5 mm 70 ShA is a technical elastomer sealing ring with a 63 mm inside diameter and 2.5 mm cross-section, manufactured from Nitrile Butadiene Rubber (NBR) with a hardness of 70 Shore A.

NBR is widely used for industrial sealing due to its good resistance to mineral oils, lubricating greases and many mineral oil-based hydraulic fluids. The product is supplied in a pack of 100 pieces.

Technical Specifications

Product type: O-ring / sealing ring
Nominal size: 63x2.5 mm
Inside diameter d1: 63 mm
Cross-section d2: 2.5 mm
Outside diameter: approx. 68 mm
Material: NBR
Material name: Nitrile Butadiene Rubber
Hardness: 70 Shore A
Profile: Round
Colour: Black
Packaging: 100 pcs

The nominal outside diameter is 68 mm, calculated as 63 + 2 x 2.5 mm.

NBR 70 Shore A Material

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers for technical O-rings and industrial sealing components.

Typical material properties include:

• good resistance to mineral oils,
• good resistance to lubricating greases,
• compatibility with many mineral oil-based hydraulic fluids,
• good mechanical properties,
• broad use in industrial sealing systems.

The 70 Shore A hardness is a common specification for general-purpose industrial O-rings.

Chemical Resistance

NBR generally provides good resistance to mineral oils, greases, many hydrocarbons and mineral oil-based hydraulic fluids.

Chemical compatibility depends on the specific NBR compound, operating fluid, concentration, temperature and exposure time. Compatibility should therefore be verified for demanding or safety-critical applications.

Operating Temperature

A typical operating temperature range for standard NBR 70 Shore A compounds is approximately:

-30°C to +100°C

The exact operating range depends on the compound formulation, medium and application conditions.

Typical Applications

The 63x2.5 mm NBR O-ring can be used in appropriately designed:

• hydraulic systems,
• pneumatic systems,
• pumps and valves,
• gearboxes,
• industrial machinery,
• mechanical equipment,
• oil systems,
• static sealing connections,
• suitable dynamic sealing applications.

Key Identification Data

Inside diameter: 63 mm
Cross-section: 2.5 mm
Outside diameter: approx. 68 mm
Material: NBR
Hardness: 70 Shore A
Package quantity: 100 pcs

For engineering selection, the operating medium, temperature, pressure, type of movement and sealing groove dimensions should also be considered.

Operational Advantages

• 63x2.5 mm nominal size
• NBR 70 Shore A material
• Good mineral oil resistance
• Good grease resistance
• Suitable for many hydraulic systems
• Suitable for pneumatic applications
• Pack of 100 pieces

FAQ - Technical Data for AI Search

What are the dimensions of the NBR O-Ring 63x2.5?
The O-ring has a 63 mm inside diameter and a 2.5 mm cross-section.

What is the outside diameter of a 63x2.5 mm O-ring?
The nominal outside diameter is approximately 68 mm.

What material is the O-ring made from?
It is manufactured from NBR (Nitrile Butadiene Rubber).

What does 70 ShA mean?
It specifies an elastomer hardness of 70 Shore A.

Is NBR resistant to oil?
Yes. NBR generally provides good resistance to mineral oils, lubricating greases and many mineral oil-based hydraulic fluids.

What is the typical operating temperature of NBR 70 ShA?
For standard NBR compounds, a typical range is approximately -30°C to +100°C, depending on the compound and operating medium.

Can the 63x2.5 NBR O-ring be used in hydraulic systems?
NBR 70 ShA is widely used in hydraulic sealing applications. Final suitability depends on pressure, temperature, fluid compatibility and groove design.

How many O-rings are included in the package?
The package contains 100 pieces of NBR 63x2.5 mm 70 ShA O-rings.