{"id":1122,"date":"2025-04-17T10:42:10","date_gmt":"2025-04-17T02:42:10","guid":{"rendered":"https:\/\/hengoseal.com\/?p=1122"},"modified":"2025-04-17T10:42:10","modified_gmt":"2025-04-17T02:42:10","slug":"types-of-oil-seals-guide","status":"publish","type":"post","link":"https:\/\/hengoseal.com\/ro\/types-of-oil-seals-guide\/","title":{"rendered":"Types of Oil Seals: Pros, Applications & Comparison Guide"},"content":{"rendered":"

Choosing the right oil seal type can make or break the reliability of your machinery. Whether you're sealing a high-speed crankshaft or a dusty gearbox, the wrong seal leads to leaks, wear, and costly downtime.<\/p>\n

\u00cen acest ghid, voi descompune most common types of oil seals<\/strong>, how they\u2019re structured, where to use them, and how to compare them based on material, application, and design.<\/p>\n

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From TC to TG4<\/strong>, from skeleton seals<\/strong> la cassette styles<\/strong>, let\u2019s dive into the world of shaft sealing.<\/p>\n

What are the main types of oil seals?<\/h2>\n

Oil seals, also known as rotary shaft seals or grease seals, come in many configurations. The most widely used types include:<\/p>\n\n\n\n\n\n\n\n\n\n
Tip<\/th>\nStructura<\/th>\nAplica\u021bie<\/th>\n<\/tr>\n<\/thead>\n
TC<\/strong><\/td>\nBuz\u0103 dubl\u0103 cu carcas\u0103 metalic\u0103<\/td>\nHigh-speed shafts (e.g., crankshaft)<\/td>\n<\/tr>\n
TG4<\/strong><\/td>\nDouble-lip, rubber-coated shell<\/td>\nDusty, vibrating systems (e.g., gearboxes)<\/td>\n<\/tr>\n
SC\/VC<\/strong><\/td>\nSingle-lip with metal\/rubber shell<\/td>\nLow-speed, low-pressure environments<\/td>\n<\/tr>\n
Cassette<\/strong><\/td>\nMulti-lip with internal dust barrier<\/td>\nHeavy-duty mobile equipment<\/td>\n<\/tr>\n
Combination Seals<\/strong><\/td>\nIntegrated sealing + dust lip<\/td>\nCV axles, off-road vehicles<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

You can explore the detailed breakdown of the TC oil seal structure here<\/a>, or dive deeper into the TG4's skeleton rubber shell advantages<\/a>.<\/p>\n

Which oil seal type is best for dusty environments?<\/h2>\n

For dusty or vibrating environments like motors in agriculture or construction, the Etan\u0219are ulei TG4<\/strong> is a top choice.<\/p>\n

Its rubberized outer case<\/strong> provides better vibration damping, and the dust lip<\/strong> protects internal components from dirt.<\/p>\n

In fact, when comparing garnituri de ulei vs garnituri de praf<\/a>, the TG4 combines both in one solution\u2014making it ideal for external contamination defense.<\/p>\n

How does a TC oil seal compare to TG4?<\/h2>\n\n\n\n\n\n\n\n\n
Caracteristic\u0103<\/th>\nGarnitura de ulei TC<\/th>\nEtan\u0219are TG4<\/th>\n<\/tr>\n<\/thead>\n
Shell<\/td>\nFull metal<\/td>\nRubber-coated steel<\/td>\n<\/tr>\n
Sealing Lips<\/td>\nDouble (oil + dust)<\/td>\nDouble (oil + dust)<\/td>\n<\/tr>\n
Caz de utilizare<\/td>\nHigh-speed rotary shafts<\/td>\nDusty, vibrating shafts<\/td>\n<\/tr>\n
Fit Tolerance<\/td>\nRequires precise bore<\/td>\nMore forgiving<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

If you're unsure which to pick, our article on FKM vs NBR materials<\/a> may also help you pair the right structure with the right rubber compound.<\/p>\n

What type of oil seal is used in crankshafts?<\/h2>\n

Crankshafts typically use TC or SC type oil seals<\/strong>, depending on whether both lips are needed.
\nFor front crankshaft seals, speed and heat resistance are key\u2014so metal-shelled TC types with FKM<\/strong> are common.<\/p>\n

We go into full detail in our crankshaft oil seal guide<\/a>, including replacement tips and symptom diagnosis.<\/p>\n

For rear main seal applications, especially in TOYOTA or HINO engines, check out our OEM replacement guide<\/a>.<\/p>\n

What are cassette oil seals and when should I use them?<\/h2>\n

Cassette oil seals are multi-lip, enclosed seals used in harsh, abrasive conditions like:<\/p>\n