O-Ring 147x7 mm NBR

Applications

The **O‑Ring 147x7 mm NBR 70 Shore is specifically engineered for industrial sealing tasks demanding large inner diameter components. With an inner diameter of 147 mm and a cross-section thickness of 7 mm, this rubber gasket provides robust sealing for fluid‐power systems such as hydraulic cylinders, pneumatic housings, bearing housings, gearboxes and large static interface surfaces. Constructed from nitrile-butadiene rubber (NBR) with a hardness of 70 Shore A, it meets the requirements of industrial sealing, chemical resistance and heavy‐duty equipment use.

Advantages

• Large ID specification - 147 mm inner diameter and 7 mm cross-section simplify sealing large bore assemblies with a single ring, eliminating multiple smaller seals and reducing stock complexity.

• High durability material - The NBR (nitrile-butadiene rubber) compound is acclaimed for its resistance to mineral oils, greases, hydraulic fluids and aliphatic hydrocarbons, making it a trusted material for rubber seals in industrial settings.

• Optimised for industrial use - With 70 Shore A hardness, the seal achieves a balance between resilience and elasticity, enabling long service life, low compression set and consistent performance in static or light dynamic conditions.

• Procurement-efficient format for B2B - The standardised large size supports streamlined inventory, bulk purchasing and rapid maintenance turnaround in production and service environments.

Technical Data & Specification Summary

• Material: Nitrile Rubber (NBR)

• Hardness: 70 Shore A

• Inner Diameter (ID): 147 mm

• Cross-Section (CS): 7 mm

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

• Suitable Media: Mineral oil‐based oils and greases, aliphatic hydrocarbons, some hydraulic fluids H/H-L/H-LP, vegetable/animal oils

• Not Recommended for: Aromatic fuels, glycol‐based brake fluids, extended UV/ozone exposure

• Primary Uses: Large‐bore static seals, industrial hydraulic and pneumatic equipment, bearing housings, gearboxes

• Keywords incorporated for search: “O-Ring 147x7”, “rubber seal NBR 70 Shore”, “industrial sealing ring large ID”, “147 mm inner diameter O-Ring”, “technical sealing component NBR”

FAQ

Q1: What does “147x7 mm” denote?
A1: It refers to an O-Ring with an inner diameter of 147 mm and a cross-section thickness of 7 mm - suitable for sealing larger assemblies.
Q2: Why is NBR with 70 Shore hardness selected?
A2: NBR 70 Shore A offers an optimal combination of flexibility and strength, providing excellent oil and grease resistance while maintaining seal integrity under industrial conditions.
Q3: Can this O-Ring be used in hydraulic or pneumatic systems?
A3: Yes - the size and material make it an excellent choice for hydraulic cylinders, pneumatic actuators, bearing housings and industrial systems requiring reliable sealing solutions.
Q4: What are the procurement benefits of this size?
A4: A single large ID O-Ring covers larger diameters, reducing SKU counts, simplifying inventory and speeding maintenance turnaround in B2B operations.
Q5: Are there any limitations on temperature or media compatibility?
A5: While the seal performs well within -30 °C to +100 °C (short-term up to +120 °C) and in many oil‐based media, it is less appropriate for prolonged ozone/UV exposure or specialized fuels—alternative elastomers may be considered.