O-Ring 126x5 mm NBR

Applications

Designed for industrial sealing in demanding environments, the O-Ring 126x5 mm NBR 70 Shore serves as a large-inner-diameter rubber seal ideal for hydraulic systems, pneumatic actuators, pump and motor housings, bearing units and other industrial assemblies. When a durable, cost-effective static or dynamic seal is required, this large size O-ring offers a reliable solution for OEMs, machine builders and maintenance departments.

Technical Advantages

This sealing ring features a 126 mm inner diameter and a 5 mm cross-section made of nitrile-butadiene rubber (NBR) with 70 Shore A hardness. The NBR compound provides excellent oil and fuel resistance, strong chemical stability and good mechanical resilience. It withstands typical industrial temperatures from about -30 °C up to +100-120 °C, and its large cross-section supports robust performance under moderate pressure, vibration and wear. The “large ID O-ring” format means fewer parts for large-bore components and simplifies procurement. Key search terms naturally embedded include: O-Ring 126x5, rubber seal NBR 70 Shore, industrial sealing ring large ID, 126 mm inner diameter O-ring, technical sealing component.

Technical Data & Spec Summary

• Inner Diameter (ID): 126 mm

• Cross-Section (CS): 5 mm

• Material: Nitrile-Butadiene Rubber (NBR)

• Hardness: 70 Shore A

• Suitable for hydraulic and pneumatic applications, bearing housings, sealing units and large-bore assemblies.

• Excellent oil, grease and fuel resistance; recommended for industrial sealing, not exposed-to ozone/UV outdoor use.

• Bulk supply availability supports B2B stocking, standardisation and rapid service replacements.

Why Buyers Choose This O-Ring

The combination of large inner diameter and robust cross-section eliminates the need for multiple smaller rings, while the NBR 70 compound ensures cost-effective durability across static and moderate-dynamic applications. Ideal for users requiring fewer SKUs, streamlined warehouse management and high availability of industrial sealing components.

FAQ

Q1: What does “126x5 mm” mean for an O-ring?
A1: It specifies the inner diameter of 126 mm and a cross-section thickness of 5 mm—typical format for large-bore seals.

Q2: Why use NBR 70 Shore for this O-ring?
A2: NBR with 70 Shore A hardness offers an optimal balance of flexibility and strength, providing high resistance to oils, fuels, greases and many chemicals—making it ideal for industrial sealing.

Q3: Can this O-ring be used in hydraulic systems?
A3: Yes—its size and material make it suitable for hydraulic cylinders, pumps, bearing housings and other industrial applications requiring reliable large-ID seals.

Q4: What are the logistics benefits for B2B buyers?
A4: Bulk sizing and large-ID format reduce part complexity, improve inventory efficiency, support standardisation and shorten downtime due to quick service replacements.

Q5: Is this product suitable for outdoor or UV-exposed use?
A5: While the NBR 70 Shore compound excels in oil and fuel resistance, it is less ideal for prolonged UV, ozone or extremely low-temperature outdoor exposure—alternative elastomers may be considered for those conditions.