Rotary seals are designed to seal the pressurized hydraulic fluid against the

atmosphere, preventing leakage and pollution of the environment or to transfer liquids and/or gases from a stationary part into or out of rotating machinery.


c:>  The profile is designed with interference on the OD which provides a good static

fit, preventing the entry of humidity and other contamination via the outside diameter.

c:>  No spring preloaded sealing lip which enables a compact design.

c:>  Small  friction  and  low  heat  build-up.

c:>  Not suitable for pressure from the trailing side.

c:>  Increased  design  possibilities  compared  to  OS08.


Needle bearings, sealing of viscous media (f.e. grease), etc. Useage as additional wiper.

Max. speed: PU 5 m/s; NBR 10m/s


snap-in installation

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface 6,3 1,6
groove face 15 3

tolerance recommendation

tolerances [mm]
L + 0.2
ø NA H8
ø NI f8