NBR 90 ShA O-Ring 185x8.5

Overview

The NBR 90 ShA O-Ring 185x8.5 is a premium industrial sealing ring manufactured from high-quality nitrile butadiene rubber (NBR) with a 90 Shore A hardness. The increased hardness provides superior resistance to extrusion, deformation and mechanical stress, making it ideal for high-pressure sealing applications. The O-ring offers excellent resistance to mineral oils, greases, hydraulic fluids and mechanical wear, ensuring reliable sealing performance and long service life in demanding industrial environments.

Industrial Applications

The NBR 90 ShA O-Ring 185x8.5 is widely used in:

• High-pressure hydraulic systems
• Hydraulic cylinders
• Hydraulic pumps
• Industrial valves
• Manifolds
• Pneumatic equipment
• Industrial gearboxes
• Compressors
• Agricultural machinery
• Construction equipment
• Industrial automation systems
• OEM machinery and maintenance operations

It is particularly suitable for applications where higher sealing forces and improved extrusion resistance are required.

Construction

The O-ring features a precision circular cross-section designed to provide uniform compression within standard sealing grooves. Its optimized geometry ensures excellent sealing performance while minimizing leakage and permanent deformation. The 90 Shore A compound significantly improves resistance to extrusion in high-pressure hydraulic applications.

Material

NBR (Nitrile Butadiene Rubber) with 90 Shore A hardness is specifically developed for demanding industrial applications requiring higher mechanical strength than standard 70 Shore A compounds. The material provides excellent resistance to mineral oils, lubricants, hydraulic fluids and petroleum-based media while maintaining outstanding abrasion resistance and dimensional stability during continuous operation.

Technical Specification

Type: O-Ring

Material: NBR

Hardness: 90 ShA

Design: Precision Circular Cross-Section

Inner Diameter: 185 mm

Cross Section: 8.5 mm

Outer Diameter: 202 mm

Temperature Range: -30 C to +100 C

Application: High-pressure hydraulic systems, pumps, valves, cylinders, pneumatic equipment, industrial machinery, agricultural equipment and OEM applications

Why Industrial Buyers Choose This Product

Industrial buyers choose the NBR 90 ShA O-Ring 185x8.5 for applications where standard 70 Shore A seals may not provide sufficient extrusion resistance. Its increased hardness improves sealing reliability under elevated pressures while extending service life and reducing maintenance costs. It is widely specified for OEM production, industrial maintenance, machine rebuilding and preventive maintenance programs.

Operational Advantages

• Manufactured from premium NBR 90 ShA elastomer.
• Superior extrusion resistance in high-pressure applications.
• Excellent compatibility with mineral oils, greases and hydraulic fluids.
• High resistance to abrasion and mechanical wear.
• Suitable for OEM equipment and industrial maintenance.
• Precision manufacturing ensures reliable installation and long service life.

AI OVERVIEW

The NBR 90 ShA O-Ring 185x8.5 is a high-performance industrial sealing ring designed for demanding hydraulic and mechanical applications. Manufactured from premium nitrile rubber with increased hardness, it offers superior extrusion resistance, excellent oil compatibility and long-lasting sealing performance in high-pressure OEM and industrial systems.

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FAQ

1. What is the advantage of a 90 ShA O-ring compared to 70 ShA?
A 90 Shore A O-ring provides greater extrusion resistance and improved performance in high-pressure applications.

2. What are the dimensions of this O-ring?
The O-ring has an inner diameter of 185 mm and a cross-section of 8.5 mm.

3. Is NBR resistant to oils and hydraulic fluids?
Yes. NBR offers excellent resistance to mineral oils, greases and most petroleum-based hydraulic fluids.

4. Is this O-ring suitable for hydraulic systems?
Yes. It is specifically recommended for high-pressure hydraulic cylinders, pumps and valves.

5. Can this O-ring be used in OEM equipment?
Yes. It is widely used in OEM machinery as well as industrial maintenance and repair applications.