O-Ring 152x4 NBR 70 ShA

Technical Specifications and Applications of O-Ring 152x4 NBR 70 ShA

The O-Ring 152x4 NBR 70 ShA is a premium circular sealing ring designed for static and low-motion applications. With an inner diameter of 152 mm and cross-sectional thickness of 4 mm, it is made from NBR (nitrile rubber) with hardness 70 Shore A, balancing flexibility and robustness.

Key Features & Material Properties

• Inner diameter (ID): 152 mm

• Cross-section / thickness: 4 mm

• Material: NBR (nitrile rubber)

• Hardness: 70 Shore A

• Color: Black (standard for NBR)

• Resistance profile: Excellent performance in oils, greases, fuels, many common chemicals

• Service temperature range: approximately -30 °C to +100 °C (or slightly higher in short duty)

• Standards & availability: Standard size found in many O-ring catalogs (e.g. OR-152x4-NBR70)

• Typical uses: hydraulic systems, pneumatic cylinders, gearboxes, pumps, rotational shafts with low to moderate speed, sealing housings

This O-Ring is widely listed in global catalogs with designation OR-152X4-NBR70, confirming its dimensions and material. In particular, O-Ring Stocks lists this item as 152x4 mm, NBR, hardness 70 Shore A.

Advantages & Use Cases

• Good balance between flexibility and mechanical strength for many sealing tasks

• NBR offers strong resistance to oils, greases, and many hydrocarbons, making it ideal for industrial environments

• Standard metric size increases interchangeability and simplifies sourcing

• Suitable for static or reciprocating/semi-rotary applications where full dynamic sealing is not critical

• Durable under repeated compression/relaxation cycles

Installation & Maintenance Tips

• Ensure the shaft or housing groove is clean, burr-free, and within tolerance

• Lubricate lightly (compatible fluid) before installation to reduce friction and wear

• Avoid twisting or stretching the O-ring excessively during installation

• Check periodically for signs of aging: hardening, cracking, deformation

• Replace if any deterioration occurs

FAQ - Frequently Asked Questions

Q1: What does “152x4 NBR 70 ShA” signify?
It means the O-ring has an inner diameter of 152 mm, a cross-section (thickness) of 4 mm, and is made of nitrile rubber (NBR) with hardness 70 Shore A.

Q2: What is the temperature range for NBR 70 ShA O-rings?
A typical working range is from about -30 °C to +100 °C, sometimes up to ~+120 °C in short-term conditions, depending on fluid, pressure, and specific compound.

Q3: Is NBR 70 ShA suitable for oil and grease applications?
Yes — NBR in 70 Shore A hardness is widely used in applications exposed to oils, greases, and fuels due to good chemical resistance.

Q4: Can this O-ring be used in hydraulic or pneumatic systems?
Yes, in many static or moderately dynamic seal positions (pistons, housings, shafts) provided the speed, pressure, and fluid compatibility are within safe limits.

Q5: How do I know if the O-ring is failing or needs replacement?
Signs include cracks, loss of elasticity, scaling, permanent deformation, leakage under pressure. At first sign of deterioration, replace it.

Q6: How quickly can I get this seal?
We stock this O-ring and provide 24h shipping — fast and efficient order processing.