Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of nbr o ring in automobile brake system in China, also supports customized service. Please feel free to buy high quality nbr o ring in automobile brake system for sale here from our factory.
Products Description
Car brake master cylinders usually use nitrile rubber (NBR) seals.
Since the brake master cylinder needs to withstand hydraulic pressure and contact with brake fluid, NBR rubber seals can provide reliable sealing performance and prevent brake fluid leakage. In addition, NBR rubber also has good processing performance, and seals of various shapes and sizes can be produced according to the design requirements of the master cylinder to adapt to different models and specifications of brake master cylinders.
The commonly used sealing elements in automobile brake lines are O-rings, which are annular rubber seals with a circular cross-section. In brake lines, the main function of O-rings is to ensure the sealing performance of connection points and joints and prevent brake fluid leakage.
nBR O ring in automobile brake Description
| Property | Value | Unit | DIN Standard |
| Hardness | 75 | Shore A | DIN ISO 7619-1 |
| Density | 1.15 | g/cm³ | DIN EN ISO 1183-1 |
| Tensile strength at 100% elongation | N/mm² | DIN 53504 | |
| Elongation at break | 249 | % | DIN 53504 |
| Tensile strength | 14.09 | N/mm² | DIN 53504 |
| Compression set 100°C/24h | 23 | % | DIN ISO 815-1 B |
| Rebound resilience | 36 | % | DIN ISO 53512 |
| Tear resistance | 6.1 | N/mm | DIN ISO 34-1 |
| Min. operating temperature | - | °C | constantly |
| Max. operating temperature | + | °C | constantly |
| Cold, flexible up to approx. | -34 | °C |
NBR (nitrile butadiene rubber) is a material commonly used for O-rings in automobile brake lines. The following is its detailed introduction and some characteristics of physical, chemical, and machining properties
Physical properties
- Density: The density of NBR rubber is usually between 1.0 and 1.2 grams/cubic centimeter, which has a moderate density.
- Hardness: NBR rubber typically ranges in hardness from 50 to 90 (varies based on the hardness testing method) and can be adjusted to suit specific application requirements.
- Elastic modulus: The elastic modulus of NBR rubber is usually between 1 and 10 MPa, which makes it good elastic and able to withstand pressure changes without easily losing its shape.
Chemical properties
Oil resistance: NBR rubber has excellent oil resistance and can be used for a long time in oily media such as brake fluid without corrosion or dissolution.
Chemical resistance: NBR rubber has good resistance to some chemicals, including some common brake fluid ingredients, such as ethylene glycol, ethanolamine, and silicone oil.
Machining performance
Compression deformation: NBR rubber has good compression deformation performance and can maintain sealing performance under pressure without being easily deformed.
Wear resistance: NBR rubber has certain wear resistance and can withstand the high pressure and frequent working conditions that may exist in the braking system.
Processing properties: NBR rubber is relatively easy to process, and O-rings can be made through processing methods such as compression molding, extrusion, or injection molding.
It should be noted that the specific physical and chemical processing properties may be affected by factors such as material formulation, hardness, manufacturing process, etc. Therefore, in practical applications, it is necessary to select appropriate NBR rubber materials and processing methods according to specific requirements to ensure the performance and reliability of NBR O ring in automobile brake system.
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