O‑Ring 235x6 mm NBR

Applications

The O-Ring 235x6 mm NBR 70 Shore is a precision-manufactured rubber gasket designed for robust industrial sealing applications. With an inner diameter (ID) of 235 mm and a cross-section thickness of 6 mm, this technical seal is ideal for hydraulic cylinders, pneumatic vessels, large pump and valve assemblies, drive shafts, heavy-duty gearboxes, and other large-format equipment requiring dependable sealing performance. The NBR (nitrile butadiene rubber) composition, at 70 Shore A hardness, aligns with industrial search terms such as “industrial sealing ring NBR 70Shore”, “large bore O-Ring”, “rubber seal 235 mm ID”.

Advantages

• Large-format size (235x6 mm) enables sealing of larger bore housings with one ring, reducing complexity and inventory count.

• Material specification (NBR 70 Shore) offers excellent resistance to mineral oils, greases, hydraulic fluids and most lubrication systems commonly used in industrial applications.

• High durability and wear resistance, supporting extended service life and reduced maintenance in heavy-use environments.

• Versatile for both static and limited dynamic sealing applications—useful for OEM manufacturing, maintenance operations, and procurement of standardised large-ID seals.

• Optimised for procurement channels: the product aligns with B2B keyword demands such as “rubber gasket NBR”, “technical seal large ID”, “industrial O-Ring 70Shore”.

Technical Data

• Material: Nitrile Butadiene Rubber (NBR)

• Hardness: 70 Shore A

• Inner Diameter (ID): 235 mm

• Cross-Section (CS): 6 mm

• Recommended Usage: Static or low-motion sealing in hydraulic, pneumatic, and industrial systems

• Temperature Range: approx. -30 °C to +100 °C (depending on fluid and duty)

• Compatible Media: Mineral-oil based oils, greases, hydraulics; typical for “industrial sealing”, “oil and grease resistance”.

• Keywords in use: “O-Ring 235x6”, “rubber seal NBR 70 Shore”, “industrial sealing ring 235 mm ID”, “large-diameter O-Ring NBR”, “technical sealing component”.

FAQ

Q1: What do the dimensions “235x6 mm” mean for this O-Ring?
A1: They indicate an inner diameter (ID) of 235 mm and a cross-section thickness of 6 mm, indicating suitability for larger bore housings and standard sealing grooves designed around 235 mm diameter.

Q2: Why select NBR at 70 Shore hardness?
A2: NBR (nitrile rubber) at 70 Shore A provides an optimal combination of flexibility and durability, offering high resistance to oils, greases and many industrial fluids—making it a preferred choice in fluid-power and heavy-industrial sealing.

Q3: Can this O-Ring be used in dynamic sealing applications?
A3: Yes, it is suitable for static seals and many low-motion or reciprocating applications. For high-speed rotary shafts or extreme dynamic duty, a specialised lip seal or rotary shaft seal may be more appropriate.

Q4: Which industries commonly use this size and specification?
A4: Industries such as hydraulics, pneumatics, heavy machinery manufacture, industrial pumps, drive systems and mobile equipment typically specify large-ID seals like 235 mm when standard sizes are insufficient.

Q5: Are there any limitations when using NBR 70 Shore?
A5: While NBR performs excellently for oils and general industrial service, it is less suited for continuous exposure above ~120 °C, aggressive solvents, strong ozone or UV environments. Select alternative elastomers (e.g., FKM/Viton) when such conditions apply.