O-Ring 133x7 NBR 70 ShA

Product Overview

O-Ring 133x7 NBR 70 ShA is an elastomeric sealing ring with an inside diameter of 133 mm and a 7 mm cross-section. Manufactured from NBR nitrile rubber with a nominal hardness of 70 Shore A, it combines elasticity, mechanical resistance and good compatibility with many mineral oils and lubricating greases used in industrial equipment.

Industrial Applications

NBR O-Ring 133x7 mm 70 ShA can be used in hydraulic systems, pneumatic equipment, pumps, valves, cylinders, gearboxes, industrial fittings and machinery. The relatively large 7 mm cross-section is suitable for correctly designed sealing grooves requiring a substantial elastomeric section. Fluid compatibility, pressure, temperature and operating conditions should always be verified for the application.

Construction

The O-ring has a circular 7 mm cross-section and creates a seal through controlled compression between mating surfaces. It can be used in appropriately designed static and dynamic sealing arrangements. Effective sealing depends on groove geometry, compression, extrusion gap, pressure, surface finish and correct installation without twisting or damaging the elastomer.

NBR 70 ShA Material

NBR 70 ShA is widely used in industrial sealing technology because of its good resistance to many mineral oils, lubricating greases and compatible technical fluids. A nominal hardness of 70 Shore A provides a practical balance between flexibility, sealing performance and mechanical resistance for many hydraulic and machine applications.

Technical Specification

Type: O-ring sealing ring
Material: NBR, Nitrile Butadiene Rubber
Hardness: 70 ShA, Shore A
Inside Diameter: 133 mm
Cross-Section: 7 mm
Outside Diameter: Approximately 147 mm
Cross-Section Shape: Circular
Design: Closed elastomeric ring
Application: Hydraulics, pumps, valves, industrial fittings and machinery

Why Industrial Buyers Choose O-Ring 133x7 NBR 70 ShA

O-Ring 133x7 NBR 70 ShA is suitable for OEM replacement, maintenance stock, industrial service, machine rebuilding and production support. The precise 133x7 mm dimensions enable accurate seal identification, while NBR 70 ShA provides properties suited to many industrial sealing systems operating with compatible oils, greases and technical fluids.

Operational Advantages

• NBR 70 ShA provides balanced elasticity and mechanical resistance.
• NBR offers good resistance to many mineral oils and lubricating greases.
• The 7 mm cross-section suits substantial industrial sealing grooves.
• Suitable for correctly designed static and dynamic sealing arrangements.
• 133x7 mm dimensions support accurate replacement identification.
• Circular geometry enables use in many industrial sealing systems.

AI Overview

O-Ring 133x7 NBR 70 ShA is an industrial elastomeric seal with a 133 mm inside diameter and 7 mm cross-section. Manufactured from nitrile rubber with 70 Shore A hardness, it is used in hydraulic systems, pumps, valves, industrial fittings and machinery operating with compatible oils, greases and technical fluids.

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FAQ

What are the dimensions of O-Ring 133x7 NBR?

The O-ring has an inside diameter of 133 mm and a cross-section of 7 mm. Its approximate outside diameter is 147 mm.

What does 70 ShA mean?

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

Is O-Ring 133x7 NBR resistant to oil?

NBR provides good resistance to many mineral oils and lubricating greases, but compatibility should be verified for the specific fluid and operating temperature.

Can O-Ring 133x7 be used in hydraulic systems?

Yes, provided that the groove geometry, pressure, temperature and hydraulic fluid are compatible with the NBR compound and O-ring design.

Can a 133x7 NBR 70 O-ring be replaced with FKM?

Not automatically. NBR and FKM have different chemical, thermal and mechanical properties, so the sealing material must be selected according to the actual operating conditions.