NBR O-Ring 8x1.8 mm 70 ShA

NBR O-Ring 8x1.8 mm 70 ShA - Oil-Resistant Seal - Pack of 100

NBR O-Ring 8x1.8 mm 70 ShA is a technical elastomer sealing ring with an 8 mm inside diameter and 1.8 mm cross-section, manufactured from NBR (Nitrile Butadiene Rubber) with a hardness of 70 Shore A.

NBR is widely used for technical sealing because of 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: 8x1.8 mm
Inside diameter d1: 8 mm
Cross-section d2: 1.8 mm
Nominal outside diameter: 11.6 mm
Material: NBR
Material name: Nitrile Butadiene Rubber
Hardness: 70 Shore A
Cross-section profile: Round
Colour: Black
Package quantity: 100 pcs

The nominal outside diameter is 11.6 mm, calculated as 8 + 2 x 1.8 mm.

NBR 70 Shore A Material Properties

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

Typical 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.

A hardness of 70 Shore A is a standard specification for many general-purpose technical O-rings.

Oil and Fluid Resistance

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

Chemical compatibility depends on the specific NBR compound, operating medium, temperature, concentration and exposure time.

Operating Temperature

For standard NBR 70 Shore A compounds, a typical operating temperature range is approximately:

-30°C to +100°C

The exact permissible temperature range depends on the specific compound and operating medium.

Typical Applications

The 8x1.8 mm NBR O-ring can be used in appropriately designed:

• hydraulic systems,
• pneumatic systems,
• pumps and valves,
• technical fittings,
• oil systems,
• industrial machinery,
• mechanical equipment,
• static sealing connections,
• suitable dynamic sealing arrangements.

Key Identification Data

Inside diameter: 8 mm
Cross-section: 1.8 mm
Outside diameter: 11.6 mm
Material: NBR
Hardness: 70 Shore A
Package: 100 pcs

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

Operational Advantages

• 8x1.8 mm nominal size
• NBR sealing material
• 70 Shore A hardness
• Good mineral oil resistance
• Good grease resistance
• Suitable for many hydraulic and pneumatic applications
• Pack of 100 pieces

FAQ - NBR O-Ring 8x1.8 mm 70 ShA

What are the dimensions of the NBR O-Ring 8x1.8?
The O-ring has an 8 mm inside diameter and a 1.8 mm cross-section.

What is the outside diameter of an 8x1.8 mm O-ring?
The nominal outside diameter is 11.6 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 the NBR 8x1.8 O-ring oil resistant?
Yes. NBR provides good resistance to mineral oils, lubricating greases and many mineral oil-based hydraulic fluids.

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

Can this O-ring be used in hydraulic systems?
NBR 70 Shore A 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 NBR O-Rings 8x1.8 mm 70 ShA.