O-ring 175x7 NBR

O-ring 175x7 NBR 70 ShA Nitrile Rubber Seal

O-ring 175x7 NBR 70 ShA is a large diameter nitrile rubber sealing ring designed for industrial sealing applications requiring resistance to oils, lubricants and mechanical wear. With an inner diameter of 175 mm and a cross section of 7 mm, this O-ring provides reliable sealing performance in hydraulic systems, heavy machinery and industrial equipment where stable sealing and long service life are essential.

O-rings made from NBR nitrile rubber are among the most widely used sealing elements in industrial technology. Their excellent compatibility with mineral oils, fuels and lubricants makes them suitable for a wide range of technical installations. The 175x7 O-ring NBR 70 Shore hardness ensures an optimal balance between elasticity and mechanical strength, allowing the seal to maintain tight contact surfaces under pressure.

Industrial applications

The O-ring 175x7 NBR 70 ShA is commonly used in larger mechanical assemblies where a durable sealing solution is required. Due to its larger diameter and thicker cross section, this sealing ring is often installed in industrial machinery components exposed to oil based fluids and mechanical load.

Typical industrial applications include:

industrial hydraulic systems
heavy duty pumps
large industrial valves
hydraulic cylinders
machinery used in manufacturing plants
fluid transfer equipment

The 175x7 mm sealing ring dimension allows installation in equipment that requires reliable sealing under continuous industrial operation.

Construction and design

The O-ring 175x7 NBR 70 Shore is manufactured using nitrile rubber with a circular cross section designed to create uniform sealing pressure between contact surfaces. This simple geometry allows the seal to adapt to surface tolerances and maintain reliable sealing in static and dynamic applications.

NBR nitrile rubber provides high flexibility combined with strong resistance to oils, greases and fuels. A hardness rating of 70 Shore A ensures that the seal maintains its elasticity while also resisting deformation during long term operation.

These properties make the 175x7 O-ring suitable for demanding mechanical and industrial environments.

Technical specifications

Type: O-ring sealing ring
Material: NBR nitrile rubber
Hardness: 70 ShA
Inner diameter: 175 mm
Cross section: 7 mm
Outer diameter: approximately 189 mm
Color: black

NBR material offers excellent resistance to mineral oils, lubricants and petroleum based fluids commonly used in industrial installations.

Operational advantages

The O-ring 175x7 NBR 70 ShA sealing ring provides several important advantages for industrial sealing applications.

Key benefits include:

high sealing reliability
resistance to oils and fuels
good mechanical durability
elasticity under compression
long operational life in hydraulic systems

These properties make nitrile O-rings a standard sealing solution in many industrial sectors.

Dimensional compatibility

The 175x7 mm O-ring dimension is used in larger hydraulic and mechanical assemblies where stronger sealing pressure is required. The 7 mm cross section increases contact area between sealing surfaces, improving sealing efficiency in industrial equipment.

This size is commonly used in hydraulic cylinders, pumps and heavy industrial machinery components.

FAQ

What is the O-ring 175x7 NBR 70 ShA used for
This O-ring is typically used in hydraulic systems, industrial pumps, valves and heavy machinery components.

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

Can the 175x7 O-ring be used in hydraulic systems
Yes, O-rings made from NBR with hardness 70 ShA are widely used in hydraulic installations.

Why is 70 Shore hardness commonly used
A hardness of 70 ShA offers an optimal balance between flexibility and durability for most industrial sealing applications.

The price is for 100 pcs.

NBR (nitrile butadiene rubber)

.

Among standard seals such as O-rings and radial shaft seals, NBR is the most widely used material.

The reasons for this are good mechanical properties, high abrasion resistance, low gas permeability

and the high resistance to mineral oil based oils and greases.

NBR is a copolymer of butadiene and acrylonitrile.

Depending on the application, the content of acrylonitrile can vary between 18% and 50%.

Low ACN content improves cold fl exibility at the expense of the resistance to oil and fuel.

High ACN content improves the resistance to oil and fuel while reducing the cold fl exibility and increasing compression set.

NBR has good resistance to:

mineral oil-based oils and greases

aliphatic hydrocarbons

vegetable and animal oils and fats

hydraulic oils H, H-L, H-LP

hydraulic fl uids HFA, HFB, HFC

silicone oils and silicone greases

water (max. 80°C)

NBR is not resistant to:

fuels with high aromatic content

aromatic hydrocarbons

chlorinated hydrocarbons

non-polar solvents

hydraulic fl uid HFD

glycol-based brake fl uids

ozone, weathering, ageing, UV resistance

Application temperature range:

Standard types -30°C to +100°C (short term +120°C)

Special grades possible down to -50°CStandard types -30°C to +100°C (short term +120°C)

Special grades possible down to -50°C