The basic principle of sealing is straightforward – the flexible lip is held against the rotating part (usually the shaft) whilst the casing (or O.D.) is pressed into the housing or bore and holds the seal in place. The sealing lip needs some form of lubrication to avoid overheating and is usually energized by means of a garter spring.
PTFE material is a perfect ingredient in making more reliable oil seals. These materials are used to make oil seals that can resist dry or unlubricated operations. PTFE oil seals, which are also called teflon oil seals, have a thermal strength ranging from -202 degrees Fahrenheit to 392 degrees Fahrenheit and an excellent chemical resistance. Oil seal PTFE is considered as the future of radial shaft seals.
Construction of an Oil Seal
Sump gaskets are usually in several pieces, often with separate curved seals that fit under the front and rear main-bearing housings of the crankshaft.
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Samples Submission :21-28 days with existing toolings.
This technique is used when the seal depth must match the housing surface precisely. It involves stopping the installation tool at the machined housing face. Ensure the tool is perfectly perpendicular to the shaft for best results. This technique is ideal for applications requiring exact seal positioning relative to the housing face.
Generally, an oil seal is made up of an outer circular metal part and a bonded inner flexible material (often nitrile rubber) that does the actual sealing.
What are Oil Seals and how do they work?
* Silicone Known for its heat resistance, silicone rubber is ideal for high-temperature applications up to 400°F (204°C). It also exhibits excellent chemical resistance and is FDA compliant for food-grade applications.Figure 4.4. Scanning electron microscope (SEM) image of the surface quenched for (A) uncured rubber and (B) transmission electron microscope (TEM) image for cured rubber [64].