Bearing Seals (Metal-Reinforced Elastomeric Type)

KOK manufactures metal-reinforced elastomeric bearing seals for rolling bearing manufacturers supplying automotive and industrial markets.

These seals are integrated directly into the bearing outer ring and seal against the inner ring as part of the complete bearing assembly. They are functional bearing components where dimensional stability, friction behaviour, and material consistency directly influence bearing torque, temperature rise, and service life.

Integrated Bearing Performance

Bearing seals are not standalone sealing elements. They operate as part of a dynamic rotating system.

KOK bearing seals are produced to support:

• Reliable lubricant retention over the intended bearing life
• Controlled exclusion of dust, moisture, and contaminants
• Stable friction behaviour across defined speed and temperature ranges
• Consistent torque characteristics within specified preload targets

We manufacture strictly to customer-defined interface drawings and performance requirements, ensuring alignment with bearing system design parameters.

Interface Discipline & Dimensional Control

Bearing seal performance is highly sensitive to geometry and interference.

Production is executed based on defined:

• Outer ring groove geometry and retention method
• Inner ring counterface specifications
• Lip configuration and radial interference values
• Assembly force requirements

Small dimensional variation can affect torque, noise, and thermal behaviour. Our processes are structured to maintain repeatable seal thickness, carrier geometry, and lip profile consistency across high-volume programs.

In-House Metal Stamping & Bonding Integrity

Carrier rings are stamped in-house, allowing controlled geometry and retention stability.

Elastomer bonding to the metal reinforcement is managed under controlled production parameters to ensure:

• Stable lip positioning
• Long-term adhesion integrity
• Resistance to centrifugal and thermal stresses

Compound Stability & Friction Behaviour

Material selection in bearing seals is driven by friction control and long-term stability.

KOK compounds critical elastomers in-house, selected for:

• Controlled friction coefficients
• Compatibility with bearing greases
• Thermal resistance under continuous rotation
• Ageing resistance and dimensional stability

Development & Production Support

KOK works from customer-provided drawings and defined interface specifications, supporting manufacturability review, material confirmation, tooling refinement, and stable transition from validation to series production.

Long-Term Supply Stability

KOK bearing seals are manufactured under controlled production systems in Taiwan and China, supporting high-volume repeatability, stable compound supply, consistent dimensional output, and multi-year program continuity.

We supply both global and regional bearing manufacturers who require disciplined execution and long-term reliability in metal-reinforced seal programs.