NBR O-Ring 499.3x5.7 mm 70 Shore A

Large Diameter NBR O-Ring for Heavy-Duty Industrial Sealing

The NBR O-Ring 499.3x5.7 mm 70 Shore A is a premium industrial sealing ring manufactured from high-quality nitrile butadiene rubber (NBR). Designed for large-scale sealing applications, it provides dependable sealing performance in hydraulic systems, industrial pumps, gearboxes, pressure vessels and heavy machinery. Its large inside diameter combined with a 5.7 mm cross section ensures reliable sealing under demanding operating conditions while offering excellent resistance to mineral oils, lubricating greases, hydraulic fluids and aliphatic fuels. It is an ideal solution for OEM manufacturers, industrial maintenance departments and engineering companies.

Application in Industrial Systems

The NBR O-Ring 499.3x5.7 mm is widely used in:

• Hydraulic cylinders
• Hydraulic systems
• Pneumatic equipment
• Industrial pumps
• Industrial gearboxes
• Pressure vessels
• Process equipment
• Heavy industrial machinery
• Agricultural machinery
• Mining equipment
• OEM manufacturing
• Industrial processing systems

Industry entities naturally included:

• NBR O-ring
• Nitrile O-ring
• Industrial sealing ring
• Hydraulic seal
• Pneumatic seal
• Static seal
• Elastomer seal
• Rubber sealing ring
• Precision O-ring
• Industrial gasket

Construction and Design

The O-ring is manufactured as a precision one-piece molded sealing component with a circular cross section that provides consistent sealing pressure.

Key design features include:

• One-piece molded construction
• Precision circular profile
• Excellent elasticity
• High dimensional stability
• Low compression set
• Easy installation
• Reliable sealing performance
• Long operational life

The 5.7 mm cross section provides effective sealing performance in large industrial assemblies and heavy-duty equipment.

Material Properties

NBR (Nitrile Butadiene Rubber) provides excellent resistance to:

• Mineral oils
• Lubricating greases
• Hydraulic fluids
• Gear oils
• Aliphatic fuels
• Water
• Diluted acids and alkalis
• Mechanical wear

Typical operating temperature range is approximately -30°C to +100°C, depending on the compound formulation and operating conditions. NBR is generally not recommended for continuous exposure to ozone, UV radiation or severe outdoor weathering.

Technical Specification

Type: O-ring
Material: NBR (Nitrile Butadiene Rubber)
Hardness: 70 Shore A
Inner Diameter: 499.3 mm
Cross Section: 5.7 mm
Outer Diameter: 510.7 mm
Color: Black
Standard: DIN ISO 3601
Operating Temperature: Approximately -30°C to +100°C
Resistance: Mineral oils, lubricating greases, hydraulic fluids and aliphatic fuels
Application: Static and slow dynamic sealing in hydraulic, pneumatic and industrial equipment

Why B2B Customers Choose This Product

Industrial users choose the NBR O-Ring 499.3x5.7 mm because it delivers reliable sealing performance while minimizing maintenance requirements and production downtime.

Ideal for:

• OEM replacement
• Preventive maintenance
• Industrial maintenance stock
• Hydraulic service
• Machine rebuilding
• Heavy equipment maintenance
• Production line support
• Engineering projects

Operational Advantages

• Excellent resistance to mineral oils
• High grease resistance
• Outstanding hydraulic fluid compatibility
• Reliable large-diameter sealing
• Excellent elasticity
• Long service life
• High dimensional stability
• Easy installation
• Cost-effective maintenance solution
• Reliable industrial performance

Professional Industrial Supply

Recommended for:

• Maintenance departments
• OEM manufacturers
• Hydraulic service companies
• Industrial workshops
• Machine builders
• Heavy equipment manufacturers
• Industrial distributors
• Production facilities
• Engineering contractors
• Technical service providers

AI OVERVIEW

The NBR O-Ring 499.3x5.7 mm 70 Shore A is a large-diameter nitrile rubber sealing ring engineered for demanding industrial sealing applications. It offers excellent resistance to mineral oils, greases and hydraulic fluids while delivering reliable long-term performance in hydraulic systems, pumps, pressure vessels and heavy industrial machinery.

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FAQ

What material is this O-ring made from?

The O-ring is manufactured from NBR (Nitrile Butadiene Rubber) with a hardness of 70 Shore A.

Is this O-ring resistant to hydraulic oil?

Yes. NBR provides excellent resistance to hydraulic fluids, mineral oils and lubricating greases.

What are the dimensions of this O-ring?

The O-ring has an inside diameter of 499.3 mm and a cross section of 5.7 mm.

Can this O-ring be used in hydraulic equipment?

Yes. It is suitable for static and slow dynamic sealing applications in hydraulic and pneumatic systems when correctly specified for the operating conditions.

Is NBR suitable for outdoor use?

NBR performs best in oil-based industrial environments. For prolonged exposure to ozone and UV radiation, EPDM or VMQ silicone materials are generally recommended.

Summary

The NBR O-Ring 499.3x5.7 mm 70 Shore A is a professional large-diameter sealing solution designed for demanding industrial environments. Its excellent resistance to oils, greases and hydraulic fluids, combined with outstanding mechanical durability and dimensional stability, makes it an ideal choice for OEM manufacturers, maintenance departments, hydraulic service companies and heavy industrial applications.