Outer skeleton oil seal

Outer skeleton oil seal refers to an oil seal with an exposed metal skeleton and no rubber wrapping on the outer ring, which has strong rigidity and tighter positioning.

feature

The outer ring metal is directly exposed, with good hardness and high rigidity, making it tighter to fit into the hole

Not easy to rotate or loosen after installation, with good sealing stability

The cost is slightly lower than that of the internal skeleton, and the structure is simple

Attention should be paid during installation, as it is easy to scratch the inner wall of the installation hole

Common structural codes

TA and TB type oil seals are mostly external skeleton structures

Usually single or double lips, with spring tightening

material

Main rubber: Nitrile rubber (NBR), Fluororubber (FKM)

Skeleton: Cold rolled steel, stainless steel

Applicable scenarios

Equipment with compact space and high rigidity requirements

Agricultural machinery, light-duty motors, universal reducers, and small pumps

The installation hole has high precision and is not easy to disassemble

Simple comparison with internal skeleton oil seal

Inner skeleton: outer ring coated with glue, no damage to holes, universal craftsmanship with ingenuity

Outer skeleton: metal exposed, good rigidity, installation needs to be cautious