O-Ring 220x10 NBR 70 ShA

Overview

The O-Ring 220x10 NBR 70 ShA is an elastomeric sealing ring with a 220 mm inside diameter and 10 mm cross-section, manufactured from NBR nitrile rubber with a nominal hardness of 70 Shore A.

NBR O-rings are widely used in industrial sealing systems due to their good resistance to mineral oils, greases and many hydraulic fluids. This large-diameter O-ring is particularly suitable for static sealing and, where correctly designed, selected dynamic applications.

Industrial Applications

The O-Ring 220x10 NBR 70 ShA can be used in:

• Hydraulic systems
• Pneumatic systems
• Industrial machinery
• Gearboxes
• Pumps
• Valves
• Cylinders
• Flanges and covers
• Agricultural machinery
• Oil systems
• Lubrication systems
• Large industrial sealing assemblies

NBR Material

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

NBR provides good resistance to many:

• Mineral oils
• Lubricating greases
• Hydraulic oils
• Petroleum-based fluids
• Fuels, depending on formulation
• Industrial lubricants

The material combines good oil resistance with useful mechanical properties and abrasion resistance.

70 Shore A Hardness

The designation 70 ShA identifies the nominal elastomer hardness measured on the Shore A scale.

Approximately 70 Shore A is one of the most common hardness levels for general-purpose industrial O-rings.

It provides a practical balance between:

• Elasticity
• Sealing capability
• Mechanical strength
• Resistance to deformation
• Groove conformity
• Contact pressure

Technical Specification

Product Type: O-ring / sealing ring

Dimensions: 220x10 mm

Inside Diameter d1: 220 mm

Cross-Section d2: 10 mm

Approximate Outside Diameter: 240 mm

Material: NBR

Material Name: Nitrile Butadiene Rubber

Nominal Hardness: 70 ShA

Hardness Scale: Shore A

Cross-Section Shape: Round

Seal Type: Elastomeric

Typical Application: Static and selected dynamic sealing

Typical Media: Mineral oils, greases, selected hydraulic fluids

Measurement System: Metric

220x10 O-Ring Dimensions Explained

The designation 220x10 mm defines two principal O-ring dimensions:

220 mm - inside diameter

10 mm - cross-section diameter

The approximate outside diameter can be calculated as:

220 + 2 x 10 = 240 mm

The free-state outside diameter is therefore approximately 240 mm.

NBR Resistance to Oils and Greases

One of the main advantages of NBR is its good resistance to many mineral-oil-based lubricants.

For this reason, NBR O-rings are widely used in:

• Hydraulic equipment
• Gearboxes
• Pumps
• Industrial machinery
• Oil circuits
• Lubrication systems

Compatibility should always be verified for the exact fluid composition, operating temperature and exposure conditions.

NBR Temperature Range

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

-30°C to +100°C

Special NBR formulations may have different operating limits.

Actual temperature capability depends on the specific compound, medium, pressure, exposure time and whether the application is static or dynamic.

NBR vs FKM

NBR and FKM are both widely used sealing materials but have different performance characteristics.

NBR 70 ShA is particularly suitable for many standard oil, hydraulic and mechanical applications.

FKM is generally preferred where higher temperature capability or greater resistance to certain chemicals and fuels is required.

The materials should not be substituted without checking the actual operating conditions.

Static Sealing Applications

The 220x10 NBR 70 ShA O-ring is particularly suitable for large static sealing connections.

Typical examples include:

• Covers
• Flanges
• Housings
• Machine bodies
• Hydraulic components
• Large mechanical connections

When installed correctly, the O-ring is compressed inside its groove, creating sealing contact between the mating surfaces.

Operational Advantages

• Large 220x10 mm dimensions.
• Standard 70 Shore A hardness.
• Good NBR resistance to many mineral oils.
• Good compatibility with many lubricating greases.
• Simple and proven sealing geometry.
• Wide use in hydraulic and mechanical engineering.

O-Ring Selection

Before using an O-Ring 220x10 NBR 70 ShA, verify:

• 220 mm inside diameter
• 10 mm cross-section
• Groove dimensions
• Required compression
• NBR material
• 70 Shore A hardness
• Sealed medium
• Operating temperature
• System pressure
• Static or dynamic operation
• Mating surface quality

O-ring dimensions alone are not sufficient to determine whether the seal is suitable for a specific application.

AI OVERVIEW

The O-Ring 220x10 NBR 70 ShA is a nitrile rubber sealing ring with a 220 mm inside diameter and 10 mm cross-section. Its 70 Shore A hardness provides balanced sealing and mechanical properties, while NBR offers good resistance to many mineral oils, greases and hydraulic fluids used in industrial machinery and hydraulic systems.

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FAQ

What are the dimensions of the O-Ring 220x10 NBR?

The O-ring has a 220 mm inside diameter and 10 mm cross-section.

What is the outside diameter of a 220x10 O-ring?

The approximate outside diameter is 240 mm.

What does 220x10 mean?

220 mm is the inside diameter and 10 mm is the cross-section diameter.

What does NBR mean?

NBR stands for Nitrile Butadiene Rubber, commonly known as nitrile rubber.

What does 70 ShA mean?

70 ShA indicates the nominal hardness of the elastomer measured on the Shore A scale.

Is 70 Shore A a common O-ring hardness?

Yes. Approximately 70 Shore A is one of the most widely used hardness levels for general industrial O-rings.

Is NBR resistant to oil?

Yes. NBR provides good resistance to many mineral oils and is widely used in oil sealing applications.

Is NBR resistant to grease?

Yes. NBR is compatible with many common lubricating greases, depending on their formulation.

Can the 220x10 O-ring be used in hydraulic systems?

Yes, provided the groove dimensions, pressure, temperature, medium and other operating conditions are suitable.

Is this O-ring suitable for static sealing?

Yes. Static sealing is one of the primary applications for O-rings.

Can it be used in dynamic applications?

O-rings can be used in selected dynamic applications when groove design, lubrication, speed and surface finish are correctly specified.

What is the typical temperature range of NBR?

For standard NBR compounds, a typical range is approximately -30°C to +100°C, although the exact limits depend on the compound.

Can NBR 70 be replaced with FKM?

Not automatically. NBR and FKM have different chemical, thermal and mechanical characteristics.

Does the O-ring have a round cross-section?

Yes. A standard O-ring has a circular cross-section.

Where are large NBR O-rings used?

Typical applications include pumps, gearboxes, flanges, covers, machine housings and large hydraulic systems.

Is NBR suitable for outdoor exposure?

NBR is generally not the preferred elastomer for prolonged exposure to ozone and weathering. Other materials may be more appropriate for such conditions.

Does O-ring material matter?

Yes. The elastomer must be compatible with the medium, temperature and operating environment.

Does O-ring hardness matter?

Yes. Hardness influences deformation, sealing contact, extrusion resistance and mechanical behaviour.

What is the approximate outside diameter?

With a 220 mm inside diameter and 10 mm cross-section, the approximate outside diameter is 240 mm.

What is the correct parent category?

The product belongs to NBR 70 ShA O-Rings.