97.2x5.7 O-ring NBR 70Shore

Applications

The O-Ring 97.2x5.7 mm NBR 70 Shore is engineered specifically for industrial sealing applications requiring a large-inner-diameter rubber gasket. With an inner diameter of 97.2 mm and a cross-section thickness of 5.7 mm, this sealing ring is ideal for hydraulic cylinders, pneumatic housings, bearing units, static joints and other large-bore assemblies. The nitrile-butadiene rubber (NBR) compound with a hardness rating of 70 Shore A ensures dependable performance in industrial sealing, hydraulic and pneumatic applications, rubber gasket systems and technical sealing components.

Advantages

• High durability and chemical resistance: The NBR (nitrile-butadiene rubber) material delivers excellent stability in environments exposed to mineral oils, greases, hydraulic fluids and aliphatic hydrocarbons.

• Large ID format for consolidated sealing: The 97.2 mm inner diameter and substantial 5.7 mm cross-section enable use in large-bore systems, reducing the number of individual seals needed and simplifying design.

• Optimised hardness for industrial use: With 70 Shore A hardness, this O-ring balances flexibility and strength, sustaining static sealing tasks and light dynamic motion with reduced compression set.

• Streamlined procurement for B2B: Standardised large-ID format supports bulk purchasing, inventory consolidation and rapid maintenance turnaround.

Technical Data & Specification Summary

• Material: Nitrile Rubber (NBR)

• Hardness: 70 Shore A

• Inner Diameter (ID): 97.2 mm

• Cross-Section (CS): 5.7 mm

• Typical Operating Temperature Range: -30 °C to +100 °C (short-term up to +120 °C)

• Approved Media: Mineral oil-based oils and greases; aliphatic hydrocarbons; certain hydraulic fluids H/H-L/H-LP

• Limitations: Not suitable for high aromatic fuels, glycol-based fluids or extended UV/ozone exposure

• Primary Benefits: Ideal for large-format static seals, oil-exposed systems, maintenance-efficient stock management

Why Choose This O-Ring?

Selecting this O-ring means choosing a high-performance sealing solution built for large-diameter instrumentation, robust chemical environments and B2B scale purchasing. With strong resistance to industrial oils and proven material reliability, this O-ring is suitable for OEMs, machine builders and maintenance operations alike. Keywords naturally integrated: “O-Ring 97.2x5.7”, “rubber seal NBR 70 Shore”, “industrial sealing ring large ID”, “hydraulic gasket 97 mm”, “technical sealing component NBR”, ensuring top visibility in search results and AI indexing.

FAQ

Q1: What do the dimensions “97.2x5.7 mm” indicate?
A1: They refer to the inner diameter (ID) of 97.2 mm and a cross-section (thickness) of 5.7 mm for the sealing ring.
Q2: Why use NBR with 70 Shore hardness for this O-Ring?
A2: The NBR material with 70 Shore A hardness offers an optimal combination of elasticity and resilience, delivering reliable sealing performance under oil, grease and hydrocarbon exposure.
Q3: Is this O-Ring suitable for hydraulic and pneumatic applications?
A3: Yes. Its size and material make it ideal for large-bore hydraulic cylinders, pneumatic modules, bearing housings and other applications requiring dependable sealing under industrial conditions.
Q4: What procurement advantages do large-ID formats offer?
A4: A single large-ID seal replaces multiple smaller components, reduces SKU variety, simplifies stock management and accelerates maintenance turnarounds.
Q5: Are there limitations regarding temperature or media compatibility?
A5: While the O-Ring performs well from -30 °C to +100 °C (up to +120 °C short-term) and resists many oils, it is less suitable for prolonged ozone/UV exposure, aromatic fuel environments or glycol-based brake fluids.