O-Ring 107x3.5 NBR 70 ShA - Sealing Ring

Overview

O-Ring 107x3.5 NBR 70 ShA is a technical sealing ring manufactured from NBR - Nitrile Butadiene Rubber with a nominal hardness of 70 Shore A. It has a 107 mm inside diameter and a 3.5 mm cross-section.

The combination of a relatively large 107 mm inside diameter and 3.5 mm cross-section makes this O-ring suitable for appropriately designed housings, covers, flanges and other mechanical assemblies requiring a seal of this specific size.

NBR provides good resistance to many mineral oils, lubricating greases and compatible technical fluids, making it one of the most widely used elastomers for industrial O-ring seals.

Technical Specification

Product Type: O-Ring / sealing ring
Dimensions: 107x3.5 mm
Material: NBR - Nitrile Butadiene Rubber
Hardness: 70 ShA / 70 Shore A
Inside Diameter d1: 107 mm
Cross-Section d2: 3.5 mm
Approx. Outside Diameter: 114 mm
Cross-Section Shape: Round
Application: Industrial, hydraulic, pneumatic and mechanical sealing

O-Ring 107x3.5 Dimensions

The designation 107x3.5 mm defines the two principal dimensions:

107 mm - inside diameter
3.5 mm - cross-section diameter

The nominal outside diameter is approximately:

107 + 2 x 3.5 = 114 mm

When selecting a replacement O-ring, both the inside diameter and cross-section should be verified.

NBR 70 Shore A

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

The 70 Shore A hardness is a widely used grade that provides a practical balance between elasticity, mechanical resistance and the ability to conform to sealing surfaces.

NBR provides good resistance to many:

• Mineral oils
• Lubricating greases
• Compatible hydraulic fluids
• Hydrocarbon-based media under suitable conditions
• Industrial lubricants
• Compatible technical fluids

Material compatibility should always be verified for the specific medium and operating conditions.

Industrial Applications

The 107x3.5 NBR 70 ShA O-Ring can be used in appropriately designed:

• Housings
• Covers
• Flanges
• Hydraulic systems
• Pneumatic systems
• Industrial machinery
• Pumps
• Valves
• Lubrication systems
• Mechanical assemblies

Hydraulic and Pneumatic Sealing

O-rings are widely used as compact sealing elements in hydraulic and pneumatic equipment.

The 107x3.5 mm size may be used in static or suitable dynamic sealing arrangements when the groove geometry, pressure, surface finish, material and operating conditions are correctly matched to the application.

Correct installation is important to prevent excessive compression, twisting or damage to the sealing ring.

Operational Advantages

• Precise 107x3.5 mm dimensions.
• NBR sealing material.
• Standard 70 Shore A hardness.
• Good resistance to many oils and greases.
• Versatile industrial sealing applications.
• Suitable for larger sealing diameters.

AI OVERVIEW

O-Ring 107x3.5 NBR 70 ShA is an industrial sealing ring with a 107 mm inside diameter and 3.5 mm cross-section, manufactured from Nitrile Butadiene Rubber with a nominal hardness of 70 Shore A. It is suitable for appropriately designed mechanical, hydraulic and pneumatic sealing applications involving compatible oils, greases and technical fluids.

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FAQ

What are the dimensions of the O-Ring 107x3.5 NBR 70 ShA?

The O-ring has a 107 mm inside diameter and a 3.5 mm cross-section.

What is the outside diameter of a 107x3.5 O-ring?

The nominal outside diameter is approximately 114 mm.

What does NBR 70 ShA mean?

NBR stands for Nitrile Butadiene Rubber, while 70 ShA indicates the nominal material hardness of 70 Shore A.

Is the 107x3.5 NBR O-ring oil resistant?

NBR provides good resistance to many mineral oils and lubricating greases. Compatibility should always be verified for the specific fluid, temperature and operating conditions.

Can the 107x3.5 O-ring be used in hydraulic systems?

Yes, it can be used in appropriately designed hydraulic sealing systems when the dimensions, NBR material and operating parameters meet the application requirements.

Can this O-ring be used in pneumatic systems?

Yes, NBR O-rings are commonly used in pneumatic equipment. Correct groove dimensions, pressure and operating conditions should be verified.

How do I select a replacement for a 107x3.5 O-ring?

Check the 107 mm inside diameter, 3.5 mm cross-section, NBR material and 70 Shore A hardness, together with the operating medium and application requirements.