OR-NBR70-15-88x1-78-RB51771
O-ring 15.88×1.78 NBR 70 Shore A
This NBR O-ring offers excellent resistance to mineral oils and fuels, making it suitable for a wide range of industrial applications.
- SKU
- OR-NBR70-15-88x1-78-RB51771
- Article number
- 51771
- Dimensions
- 15.88 × 1.78 mm
- Material
- NBR · 70 Sh A
excl. VAT
From €0.07
€0.09 incl. VAT
In stock in Považská Bystrica — delivery 1–2 business days (SK), 3–5 days (EU)
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NBR O-ring 15.88 × 1.78 mm (inner diameter 15.88 mm, cross-section 1.78 mm). Outer diameter 19.44 mm. Hardness 70 Sh A. Temperature range -30 °C to 100 °C. Standard ISO3601-15.88x1.78.
For a static seal of this size (outer diameter 19.44 mm), the ISO 3601-2 / Parker O-Ring Handbook ORD 5700 design guidance recommends a groove depth of about 1.39 mm and a groove width of about 2.31 mm for the 1.78 mm cross-section — roughly 22 % squeeze.
- Inner diameter (ID)
- 15.88 mm
- Cross-section (CS)
- 1.78 mm
- Outer diameter (OD)
- 19.44 mm
- Dimensions
- 15.88x1.78
- Material
- NBR
- Hardness
- 70 Sh A
- Colour
- black
- Temperature range
- -30 °C to 100 °C
- Standard code
- ISO3601-15.88x1.78
- ISO 3601 size
- 15.88x1.78
- SKU
- OR-NBR70-15-88x1-78-RB51771
- Country of origin
- VN
- Availability
- In stock
Technical specifications
| Material | NBR |
|---|---|
| Shore hardness | 70 Sh A |
| Color | black |
| Temperature range | -30 °C to 100 °C |
| Tensile strength | 14.4 MPa |
| Ultimate elongation | 389 % |
| Compression set | 11 % |
| Specific gravity | 1.28 g/cm³ |
| Certifications | No specific certifications |
Cross-standard size references
- Standard code
- ISO3601-15.88x1.78
- ISO 3601
- 15.88x1.78
- DIN 3771
- 15.88x1.78
Material properties
Nitrile Butadiene Rubber (NBR) is the most widely used elastomer in industrial sealing technology. It offers very good resistance to mineral oils, HLP-type hydraulic fluids, petrol and diesel fuels, propane and silicone oils. Operating temperature range is -30 °C to +100 °C, short-term up to +120 °C. It has good abrasion resistance, low gas permeability and high tensile strength. NBR is not suitable for contact with glycol-based brake fluid, ester oils, ozone and aromatic hydrocarbons.
- Material
- NBR
- Chemical name
- Nitrile Butadiene Rubber
- Material grade
- Buna-N, Nitril, Perbunan
- Trade names
- Lanxess Perbunan, Zeon Nipol, LG Kumho KNB
Suitable for various industries
NBR O-rings are routinely used in hydraulic cylinders, pneumatic systems, pumps, compressors, air pressure regulators and general mechanical applications. In automotive industry they seal oil systems, fuel lines and engine peripherals. Also suitable for agricultural and construction machinery.
Application notes
Recommended for hydraulic and pneumatic systems with mineral oils. Do not use with glycol-based brake fluid or aromatic hydrocarbons. In dynamic applications keep operating temperature below +100 °C for long service life.
Advantages
- Excellent resistance to mineral oils and HLP-type hydraulic fluids
- Resistant to petrol, diesel fuel and propane
- Operating temperature range -30 °C to +100 °C (short-term +120 °C)
- Good abrasion resistance and mechanical strength
- Best price-performance ratio among industrial elastomers
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