O-ring NBR 18x3.5 70Shore

O-ring NBR 18x3.5 70 ShA Nitrile Rubber Seal 1000 pcs

O-ring 18x3.5 NBR 70 ShA is an industrial sealing ring manufactured from nitrile butadiene rubber designed for reliable sealing in hydraulic systems, pneumatic equipment and industrial machinery. With an inner diameter of 18 mm and a cross section of 3.5 mm, this sealing element provides effective sealing in mechanical assemblies exposed to oils, lubricants and industrial fluids. The product is supplied in bulk packaging of 1000 pieces, making it an efficient solution for industrial production lines, maintenance departments and technical service workshops.

NBR nitrile O-rings belong to the most widely used technical seals in industrial engineering. Nitrile rubber offers strong resistance to mineral oils, greases and many petroleum based fluids commonly used in mechanical systems. The hardness of 70 ShA provides an optimal balance between elasticity and durability, ensuring stable sealing performance under various operating conditions.

Construction and design

The O-ring 18x3.5 NBR 70 ShA features a circular cross section that allows uniform compression between sealing surfaces. This geometry ensures reliable sealing and prevents leakage of fluids and gases in mechanical installations.

NBR nitrile rubber combines flexibility with resistance to mechanical wear. The material maintains stable performance in oil lubricated environments and in equipment operating under pressure and vibration.

A hardness level of 70 Shore A is a commonly used standard in industrial sealing technology because it offers the right balance between flexibility and mechanical strength.

Industrial applications

The O-ring dimension 18x3.5 mm is widely used in industrial systems requiring durable sealing components.

Typical industrial applications include:

hydraulic systems
pneumatic installations
industrial pumps
technical valves
hydraulic connectors
industrial machinery and production equipment

Technical sealing rings made of NBR provide reliable sealing performance while maintaining a simple installation design.

Technical specifications

Type: sealing O-ring
Material: NBR nitrile rubber
Hardness: 70 ShA
Inner diameter: 18 mm
Cross section: 3.5 mm
Outer diameter: approximately 25 mm
Color: black
Package quantity: 1000 pieces

NBR nitrile rubber provides strong resistance to mineral oils, fuels and lubricants used in many industrial systems.

Operational advantages

The O-ring 18x3.5 NBR 70 ShA sealing ring offers multiple advantages in industrial sealing applications.

Key benefits include:

reliable sealing performance
excellent resistance to oils and lubricants
good elasticity and compression properties
mechanical durability in industrial environments
long service life in hydraulic and pneumatic systems

Bulk packaging of 1000 pieces allows efficient inventory management and continuous supply for industrial production and maintenance operations.

Dimensional compatibility

The O-ring size 18x3.5 mm is designed for sealing grooves used in hydraulic and mechanical assemblies requiring a thicker sealing cross section. The larger cross section improves sealing stability in applications exposed to vibration, pressure changes or intensive industrial operation.

FAQ

What is the O-ring 18x3.5 NBR 70 ShA used for
This O-ring is used in hydraulic systems, pneumatic equipment, valves and industrial machinery requiring reliable sealing.

Is nitrile rubber resistant to oil
Yes, NBR nitrile rubber provides excellent resistance to mineral oils, fuels and lubricants.

Can the 18x3.5 O-ring be used in hydraulic systems
Yes, O-rings made from NBR with hardness 70 ShA are commonly used in hydraulic and pneumatic installations.

Why is the product supplied in packs of 1000 pieces
The bulk pack of 1000 pieces is convenient for industrial production environments and maintenance departments that require a large number of sealing components.