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Rotary shaft seal in standard design with an elastomer outer sheath covering a metal insert without an energised spring on the sealing lip. The WBO model is provided with a metal outer surface.

Product group: Rotary shaft seal
Design: A = outer surface rubber-coated
Model: O = without spring
Seal material: NBR 70
Colour: black
Seal material: NBR 70
Colour: green
Stiffening ring: non-alloy steel according to DIN EN 10139

Areas of application
Secondary sealing e.g. as a dust, dirt or spray protection seal in electric engines, as a grease retainer.

The WAO is a single-action rotary shaft seal for rotating or pivoting shafts. The sealing lip design without a spring produces less friction. As a result, the sealing action in comparison to rotary shaft seals with energised springs is reduced. The elastomer outer sheath provides good static sealing, good thermal expansion balance e.g. in light-metal housings, better sealing with greater roughness and secure sealing for split housings as well as good static sealing with thin fluid or gaseous media.

Good chemical resistance to various mineral oils and greases.

Operational application limits
Pressure (Mpa/bar): 0/0
Temperature (°C): -40 to +100
Peripheral speed (m/s): ≤ 12

Suitable tools should be used for installation. It is recommended that the installation housing is designed to provide the rotary shaft seal with axial support.

The nominal widths mentioned on the following pages represent the standard dimensions. They are generally in stock or can be delivered at short notice.

Other dimensions and different designs, e.g. double dust protection lip, spiral on the sealing lip, springs or metal inserts made of other steel grades can be produced as well as all kinds of special designs. Minimum quantities may be obligatory for dimensions outside of the standard.

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