Cassette Seals

A cassette seal is a unitised rotary cartridge containing sealing lips, a protective case and its own running sleeve. The integrated counterface and labyrinth features create a controlled sealing environment around wheel ends and shafts exposed to mud, water or abrasive debris.

Key facts

Family: Rotary & Mechanical Seals
Common types: Unitised cassette, Multi-lip cassette, Labyrinth cassette, Hub cassette, Axle cassette
Materials: NBR, FKM (fluoroelastomer), HNBR, Carbon steel, Stainless steel
Used in: Tractor axles, Off-highway hubs, Construction machinery, Forestry equipment, Commercial vehicle axles

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Types

Unitised cassette
Multi-lip cassette
Labyrinth cassette
Hub cassette
Axle cassette

Materials

Applications

Tractor axles
Off-highway hubs
Construction machinery
Forestry equipment
Commercial vehicle axles

What to send for a quote

shaft diameter
housing bore
assembled width
equipment reference
rotation and contamination conditions

Questions about cassette seals

What should I send to identify cassette seals?

Send shaft diameter, housing bore, assembled width, equipment reference, rotation and contamination conditions. Do not measure only the visible outer case, since the internal sleeve and installation orientation are integral to the assembly. A clear photograph, drawing or readable reference can resolve details that dimensions alone do not show.

How should I select cassette seals?

Match the complete cartridge to shaft and bore fits, rotation, lubrication and the expected mixture of water, slurry and grit. Confirm the mating parts and operating environment before ordering, since an apparently similar size can use a different profile, material or internal arrangement.

Last updated: 2026-10-08