O-ring 18x3,5 NBR 70 ShA

O-ring 18x3,5 NBR 70 ShA Nitrile Rubber Seal 100 pcs

O-ring 18x3,5 NBR 70 ShA is a technical sealing ring made from nitrile rubber designed for reliable sealing in hydraulic systems, pneumatic installations and industrial machinery. With an inner diameter of 18 mm and a cross section of 3,5 mm, this sealing element ensures effective sealing of mechanical connections exposed to oils, lubricants and industrial working fluids. The product is supplied in packs of 100 pieces, making it suitable for industrial maintenance departments, repair workshops and production facilities that require a consistent supply of technical seals.

NBR nitrile sealing rings belong to the most widely used elastomer sealing components in industrial engineering. Nitrile rubber provides very good resistance to mineral oils, greases and many petroleum based fluids used in mechanical systems. The hardness of 70 ShA offers an optimal balance between flexibility and durability, allowing the O-ring to maintain tight sealing performance in various operating conditions.

Construction and design

The O-ring 18x3,5 NBR 70 ShA features a circular cross section designed to create uniform compression between sealing surfaces. This geometry ensures reliable sealing by evenly distributing pressure along the sealing groove.

NBR nitrile rubber combines elasticity with resistance to mechanical wear. This allows the sealing ring to operate effectively in oil lubricated environments and in equipment subjected to vibration and pressure variations.

The hardness level of 70 Shore A is a widely used standard in industrial sealing applications, offering stable sealing performance and long service life.

Industrial applications

The O-ring dimension 18x3,5 mm is commonly used in medium sized sealing grooves in many industrial machines and mechanical systems.

Typical industrial applications include:

hydraulic systems
pneumatic equipment
industrial pumps
valves and fittings
gearboxes and mechanical assemblies
production machinery

NBR sealing rings are widely applied where oil resistant sealing components are required in industrial installations.

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: 100 pieces

NBR nitrile rubber provides strong resistance to oils, lubricants and many industrial fluids used in hydraulic and mechanical systems.

Operational advantages

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

Key benefits include:

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

The package containing 100 pieces ensures efficient supply for industrial service operations and maintenance departments.

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 increases sealing pressure and improves sealing reliability in applications exposed to vibration or higher pressure.

FAQ

What is the O-ring 18x3,5 NBR 70 ShA used for
It is used for sealing hydraulic systems, pumps, valves and many industrial mechanical assemblies.

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 widely used in hydraulic and pneumatic equipment.

Why is the product supplied in packs of 100 pieces
The pack of 100 pieces is convenient for maintenance departments and industrial production environments that require multiple seals.