Skeleton oil seals are mainly divided into single lip and double lip structures. According to the skeleton type, they can be divided into inner skeleton oil seals, exposed skeleton oil seals, and assembled oil seals. According to working conditions, they can be divided into rotating skeleton oil seals and reciprocating skeleton oil seals. ‌

Main classification of skeleton oil seals

Classify by structural form.

Single lip skeleton oil seal: With only one main sealing lip, it is mainly used to prevent oil leakage.

Double lip skeleton oil seal: In addition to the main sealing lip, there is also a secondary lip that has dust-proof function and is suitable for environments with a lot of dust. ‌‌

Classify by skeleton type.

Internal skeleton oil seal (B-type/FB type): The metal skeleton is wrapped in rubber, with good rigidity and easy assembly, but poor heat dissipation and coaxiality. ‌‌‌‌

Exposed skeleton oil seal (W-type/FW type): The metal skeleton is exposed, with accurate positioning and good heat dissipation, and simple manufacturing. ‌‌‌‌

Prefabricated skeleton oil seal (Z-type/FZ type): rubber and skeleton are processed separately and assembled, suitable for special working conditions. ‌‌‌‌

Classified by working conditions.

Rotating skeleton oil seal: used for sealing rotating shafts, such as engine crankshafts, transmissions, etc. ‌‌

Round trip skeleton oil seal: suitable for components that move back and forth, such as shock absorbers, hydraulic cylinders, etc. ‌‌

Other common models and features

TC/TB/TA types: universal, double lip, and self-lubricating, corresponding to different sealing requirements. ‌‌

SC/SB/SA type: Chemical resistant, moisture resistant, waterproof, and epoxy resin specific type. ‌‌

VC/VB type: designed for high-speed rotating shafts or high voltage resistance