The ORS1060 O-ring 140×3.5 mm is a high-quality sealing ring made from NBR nitrile rubber, designed for industrial, hydraulic, pneumatic, and general mechanical sealing applications. With its strong oil and grease resistance, it is a practical choice for systems exposed to mineral oils, hydraulic fluids, fuels, and lubricants.
Key Specifications
- Product Name: O-ring 140×3.5 (140x3,5) Nitrile NBR
- Item No.: ORS1060
- Article Number: 1060
- EAN: 6150545376383
- Material: NBR / Nitrile rubber
- Hardness: 70 Shore A
- Colour: Black
- Inner Diameter: 140 mm
- Cross Section: 3.5 mm
- DIN 3771 Size: 140×3.5
- Seal Type: O-ring
- Country of Origin: Vietnam
- Customs Code: 40169300
Material & Build Quality
This O-ring is manufactured from acrylonitrile butadiene rubber (NBR), a commonly used sealing material valued for its resistance to oils and fuels. The 70 Shore A hardness gives it a good balance between flexibility and mechanical strength, making it suitable for static and moderate dynamic sealing tasks.
The black nitrile compound provides good durability while maintaining elasticity under compression.
Technical Performance
- Temperature Range: -30°C to +135°C
- Tensile Strength: 14.4 MPa
- Ultimate Elongation: 389%
- Compression Set: 11%
- Specific Gravity: 1.28 ± 0.03 g/cm³
These specifications indicate a dependable sealing material with good resistance to deformation, pressure, and mechanical wear.
Chemical Resistance
This NBR O-ring is suitable for contact with:
- Mineral oils
- Greases
- Hydraulic fluids
- Fuels
- Aliphatic hydrocarbons
- Hydraulic oils H, H-L, and H-LP
This makes it especially useful in machinery where oil sealing is required.
Applications
The 140×3.5 mm NBR O-ring is suitable for use in:
- Hydraulic cylinders
- Hydraulic pumps
- Pneumatic cylinders
- Air pressure regulators
- Compressors
- Pumps
- General industrial sealing systems
Its large diameter makes it useful for bigger housings, covers, flanges, or hydraulic assemblies.
Installation & Use
For best performance, the groove dimensions should match the 140×3.5 mm O-ring size. The sealing surface should be clean and smooth, and the ring should be installed without twisting or overstretching. A compatible lubricant can help prevent damage during fitting.
Value for Money
With strong stock availability and a widely used standard size, this O-ring is a practical maintenance item for workshops and industrial users. Its NBR 70 compound offers dependable performance at a reasonable cost compared with more specialized materials.
Pros
- Excellent resistance to oils, greases, and fuels
- Standard 140×3.5 mm size
- Durable NBR 70 Shore A material
- Good temperature range
- Suitable for hydraulic and pneumatic systems
- Large stock availability
Cons
- Not ideal for ozone, weathering, or strong UV exposure
- Not suitable for all aggressive chemicals
- Requires correct groove sizing for proper sealing
Final Verdict
The ORS1060 NBR O-ring 140×3.5 mm is a reliable, oil-resistant sealing solution for industrial and mechanical applications. With its durable nitrile material, 70 Shore A hardness, and strong chemical resistance to oils and hydraulic fluids, it is a solid choice for maintenance, repair, and equipment sealing tasks.
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