O-Ring 220x5 NBR 70 ShA

Overview

The O-Ring 220x5 NBR 70 ShA is an elastomeric sealing ring with a 220 mm inside diameter and 5 mm cross-section, manufactured from NBR nitrile rubber with a nominal hardness of 70 Shore A.

NBR is one of the most widely used elastomers for industrial O-rings due to its good resistance to many mineral oils, greases and hydraulic fluids, combined with useful mechanical and wear properties.

The large 220 mm inside diameter makes this O-ring suitable for sealing covers, flanges, housings, pumps and other large industrial assemblies.

Industrial Applications

The O-Ring 220x5 NBR 70 ShA can be used in:

• Hydraulic systems
• Pneumatic systems
• Pumps
• Gearboxes
• Valves
• Flanges
• Machine covers
• Industrial housings
• Agricultural machinery
• Oil systems
• Lubrication systems
• General industrial equipment

NBR Material

NBR (Nitrile Butadiene Rubber), commonly known as nitrile rubber, is widely used in industrial sealing technology.

NBR provides good resistance to many:

• Mineral oils
• Lubricating greases
• Hydraulic oils
• Petroleum-based fluids
• Fuels, depending on the specific compound

The material combines good oil resistance with mechanical strength 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
• Groove conformity
• Resistance to deformation
• Sealing contact pressure

Technical Specification

Product Type: O-ring / sealing ring

Dimensions: 220x5 mm

Inside Diameter d1: 220 mm

Cross-Section d2: 5 mm

Approximate Outside Diameter: 230 mm

Material: NBR

Material Name: Nitrile Butadiene Rubber

Nominal Hardness: 70 ShA

Hardness Scale: Shore A

Cross-Section: Round

Seal Type: Elastomeric

Typical Application: Static and selected dynamic sealing

Typical Media: Mineral oils, greases, selected hydraulic fluids

Measurement System: Metric

220x5 O-Ring Dimensions Explained

The designation 220x5 mm defines:

220 mm - inside diameter

5 mm - cross-section diameter

The approximate outside diameter is calculated as:

220 + 2 x 5 = 230 mm

Therefore, the free-state outside diameter is approximately 230 mm.

Resistance to Oils and Greases

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

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

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

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

NBR Temperature Range

For standard NBR compounds, a typical indicative operating range is approximately:

-30°C to +100°C

Special NBR compounds may have different operating limits.

Actual temperature capability depends on the specific formulation, sealed medium, pressure, exposure time and operating conditions.

Static Sealing Applications

The 220x5 NBR 70 ShA O-ring is particularly suitable for large static sealing connections.

Typical applications include:

• Covers
• Flanges
• Machine housings
• Pump housings
• Hydraulic components
• Mechanical connections

When correctly installed, the O-ring is compressed within its groove to create sealing contact between the mating surfaces.

NBR vs FKM

NBR is widely used for standard applications involving mineral oils, lubricating greases and many hydraulic fluids.

FKM generally provides higher temperature capability and improved resistance to certain aggressive chemicals and fuels.

Material selection should be based on:

• Sealed medium
• Operating temperature
• Pressure
• Static or dynamic operation
• Environmental exposure

Operational Advantages

• Large 220 mm inside diameter.
• Standard 5 mm cross-section.
• Popular 70 Shore A hardness.
• Good resistance to many mineral oils.
• Good compatibility with many lubricating greases.
• Proven sealing solution for industrial machinery.

O-Ring Selection

Before installing an O-Ring 220x5 NBR 70 ShA, verify:

• 220 mm inside diameter
• 5 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 condition

O-ring dimensions alone are not sufficient to confirm suitability for a specific sealing groove.

AI OVERVIEW

The O-Ring 220x5 NBR 70 ShA is a nitrile rubber sealing ring with a 220 mm inside diameter, 5 mm cross-section and approximately 230 mm outside diameter. NBR provides good resistance to many mineral oils, greases and hydraulic fluids, while 70 Shore A hardness offers balanced mechanical and sealing properties for industrial applications.

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FAQ

What are the dimensions of the O-Ring 220x5 NBR?

The O-ring has a 220 mm inside diameter and 5 mm cross-section.

What is the outside diameter of a 220x5 O-ring?

The approximate outside diameter is 230 mm.

What does 220x5 mean?

220 mm is the inside diameter and 5 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 elastomer hardness 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 commonly used lubricating greases, depending on their formulation.

Can the 220x5 O-ring be used in hydraulic systems?

Yes, provided groove dimensions, pressure, temperature and fluid compatibility 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 dynamically?

It 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, an indicative range is approximately -30°C to +100°C, depending on the exact compound and medium.

Can NBR 70 be replaced with FKM?

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

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

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

Does a 220x5 O-ring have a 230 mm outside diameter?

Yes. Based on its nominal dimensions, the approximate outside diameter is 230 mm.

Where are large NBR O-rings used?

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

Is NBR suitable for outdoor exposure?

NBR is generally not the preferred material for prolonged exposure to ozone and weathering. Another elastomer may be more suitable for such conditions.

Does O-ring material matter?

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

Does O-ring hardness matter?

Yes. Hardness affects elasticity, deformation, extrusion resistance and sealing behaviour.

What is the correct parent category?

The product belongs to NBR 70 ShA O-Rings.