TC Oil Seal

Specifications of TC Oil Seal

Key Features of TC Oil Seal

How to Select the Appropriate TC Oil Seal

Selecting the appropriate TC oil seal requires considering multiple factors. The following are the specific selection points:

1. Dimensions

Inner Diameter: It is determined according to the diameter of the shaft on which the oil seal is installed. The diameter of the shaft needs to be precisely measured. Generally, an oil seal with an inner diameter equal to or slightly smaller than the shaft diameter is selected to ensure that the lip has a good gripping force on the shaft.

Outer Diameter: It should match the diameter of the installation cavity. Usually, the diameter of the cavity is slightly larger than the outer diameter of the oil seal to ensure that the oil seal can be installed smoothly and remain stable in the cavity.

Width: Select it according to the installation space and sealing requirements. Generally speaking, a wider oil seal can provide better sealing performance and stability, but it requires a larger installation space.

2. Materials

Nitrile Butadiene Rubber (NBR): It has good oil resistance, wear resistance, and anti-aging properties. It is suitable for general oil lubrication environments, and the working temperature range is usually around -40°C to 120°C. It is one of the most commonly used oil seal materials.

Fluororubber (FKM): It has excellent high-temperature resistance, chemical corrosion resistance, and oil resistance. It can work in a high-temperature environment of -20°C to 200°C. It is suitable for some occasions with high sealing requirements and harsh working environments, such as the sealing of high-temperature components like engines.

Silicone Rubber (VMQ): It has good high and low temperature resistance and can work within the temperature range of -50°C to 200°C. At the same time, it also has good ozone resistance and weather resistance, but its oil resistance is relatively poor. It is often used in some equipment with high requirements for low-temperature resistance or working in special environments.

3. Working Conditions

Temperature: Select the appropriate oil seal material according to the working temperature of the equipment. If the working temperature is high, fluororubber or silicone rubber oil seals with high-temperature resistance should be selected; if the temperature is low, materials with good low-temperature resistance, such as silicone rubber or special formula nitrile butadiene rubber, need to be considered.

Pressure: TC oil seals are generally suitable for sealing occasions with low pressure, usually below 0.5MPa. If the working pressure is high, a reinforced or specially designed oil seal for high-pressure environments needs to be selected, or other auxiliary sealing measures need to be taken.

Rotational Speed: The rotational speed of the shaft also has an impact on the selection of the oil seal. When the rotational speed is high, the oil seal will generate a large amount of frictional heat, and it is necessary to select an oil seal material and structure with good heat dissipation performance and strong wear resistance to avoid the failure of the oil seal due to overheating.

4. Sealing Medium: Different oil seal materials have different adaptabilities to different media. For example, nitrile butadiene rubber has good corrosion resistance to mineral oils, hydraulic oils, etc., but has poor tolerance to some organic solvents or strong acid and alkali media; fluororubber has good resistance to most chemical media. Therefore, it is necessary to select the appropriate oil seal material according to the nature of the sealing medium to ensure that the oil seal will not swell, harden, or corrode when in long-term contact with the medium, so as to ensure the sealing performance.