What does TC on oil seal mean?

-10-27

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The prevalent forms of oil seals include TC, SC, TB, SB, TA, and SA. However, many individuals are not well-acquainted with the types TF and SF.

The four types in question—TC, SC, TF, and SF—are all categorized as skeleton oil seals, specifically designed for rotary motion.

1. The TC type oil seal stands out as the most utilized variant found in contemporary industry. This seal features a double lip, wrapped in rubber, forming both an inner frame and outer sealing. The acronym 'T' signifies the double lip design, while 'C' indicates that it is rubber-coated. The main lip is intended to effectively prevent oil leakage, while the secondary lip serves to block out dust.

2. The SC type oil seal, on the other hand, is a single-lip variant that lacks the protective dust lip. It is best suited for use in dust-free environments, making it less versatile compared to the TC type.

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3. The TF type oil seal is relatively rare in standard sealing applications due to its construction, which features a rubber-coated iron shell. Typically, this type is more expensive than TC seals and is specifically designed for use in corrosive settings. The iron shell's carbon steel skeleton is susceptible to corrosion, hence the need for a protective layer of specialized rubber to maintain durability. Generally, TF seals are constructed using fluorine rubber and stainless steel springs, allowing them to withstand high temperatures and harsh environments.

4. Lastly, the SF type oil seal shares similarities with the TF type sealing system, as it is also a rubber-coated steel skeleton oil seal. However, the primary difference lies in their design: the SF is a single-lip seal optimally designed for dust-free situations, while the TF is a dual-lip seal that ensures both dust and oil resistance.

The TC Oil Seal functions as a dual lip radial seal, recognized for its low-pressure capabilities and equipped with a garter spring that helps safeguard against contaminants. Its rubber-coated outer diameter (OD) enhances the sealing effect around the outer edge. It is particularly important to note that the internal surface of the steel casing is not entirely coated in rubber. The presence of an additional dust lip effectively protects the primary sealing lip from accumulating dust and other particulates.

This type of oil seal proves useful in environments with contaminants, thereby maximizing operational efficiency. To ensure the TC seal performs optimally throughout its lifespan, it is crucial to apply a suitable lubricant between the sealing lips.