O-Ring 183 x 5,7 mm NBR 90 ShA

Applications

The O-Ring 183x5,7 mm NBR 90 ShA is engineered for demanding industrial environments where a robust rubber seal is essential. With an inner diameter of 183 mm and a cross-section thickness of 5.7 mm, this sealing ring is ideally suited for static and dynamic applications—such as flange seals, pump housings, bearing covers and actuator housings—where high durability and chemical resistance are required. Crafted from nitrile butadiene rubber (NBR) with a high hardness rating of 90 ShA, this component performs exceptionally well under oil, grease and hydraulic fluid exposure. In industrial sealing setups, whether it’s a shaft seal, static seal or general gasket, this O-Ring provides a reliable solution for procurement teams and engineers alike.

Advantages

• High durability and chemical resistance: The NBR material at 90 ShA offers superior resistance to oils, greases and industrial fluids. Market sources note that NBR O-Rings with 90 ShA are specifically suited for heavy-duty applications where pressure and wear are significant.

• Precise dimension for standard integration: With size 183x5.7 mm, this rubber gasket can be stocked as a standard metric sealing component, enabling efficient replacement in maintenance operations and B2B inventory management.

• Versatile sealing ring for industrial use: The term “industrial sealing ring” describes this element well—used in hydraulics, pneumatics, machinery, engine auxiliary units and bearing housings where sealing integrity is critical.

• Optimised for high-pressure environments: Compared to lower hardness variants (e.g., 70 ShA), the 90 ShA grade provides less deformation under load and improved longevity—especially valuable in applications with elevated pressure or load cycles.

• Streamlined B2B procurement: A component such as this O-Ring supports standardisation across machine fleets, simplifies logistics and ensures readiness in industrial production or service environments.

Technical Data

• Material: NBR (nitrile butadiene rubber) - optimal for oil and grease resistance

• Hardness: 90 ShA - high hardness rubber gasket suited for demanding sealing tasks

• Dimensions: Inner Diameter (ID) = 183 mm; Cross-Section (CS) = 5.7 mm

• Designation: O-Ring, rubber gasket, static seal, sealing ring for industrial applications

• Typical Use Cases: flange seals, bearing cover seals, hydraulic/pneumatic system gaskets, engine and machine housings
  This sealing component is designed to deliver performance where resilience matters—its high hardness and chemical compatibility make it fit for deployment in industrial assemblies that require minimal maintenance and maximum system integrity.

FAQ

Q1: Why choose NBR material with 90 ShA hardness rather than a softer grade?
A: A rubber gasket with 90 ShA hardness offers greater dimensional stability under pressure, reduced compression set and longer lifespan in oil-rich environments. For heavy industrial applications, this makes it a more robust choice than softer variants.

Q2: What applications benefit most from an O-Ring sized 183x5.7 mm?
A: This size is often used in large-diameter housings, hydraulic cylinders, pump flanges, bearing covers and gearboxes. When a reliable sealing ring is required for diameter around 183 mm and typical sealing depth, this O-Ring is ideal.

Q3: Can this O-Ring be used for dynamic (moving) seals or only static?
A: While primarily suited for static sealing (e.g., gaskets, flange interfaces), it can also support slow or moderate movement if groove design and surface finish ensure proper compression and lubrication. In highly dynamic applications, material and geometry must be carefully matched.

Q4: How do I choose the correct O-Ring for hydraulics or pneumatics?
A: Consider inner diameter, cross-section, material compatibility (e.g., NBR for oils), hardness, temperature and pressure conditions. The 183x5.7 mm NBR 90 ShA element is a strong fit for high-pressure oil or grease sealing in industrial systems.

Q5: Is this item suitable for bulk procurement and B2B stock?
A: Yes. Because of its standard size, high durability material and broad applicability, this O-Ring is ideal for industrial buyers managing inventories and maintenance spares for production systems.