KOYO – EXSEV / Ceramic Bearings

KOYO – EXSEV / Ceramic Bearings is a detailed reference for extreme‑service bearings, including hybrid and full‑ceramic designs for cleanrooms, vacuum, corrosive media and high‑temperature duty. It explains material selection (Si₃N₄ rolling elements, stainless races, engineered cages), electrical insulation behavior and lubrication strategies (minimal‑lubrication, solid‑film and special greases). The catalog provides dimensional tables, cage/seal variants and application notes for semiconductor tools, food & beverage and chemical processes where conventional steel bearings fail.

Content overview

• Hybrid/full‑ceramic options, cages and seal styles.
• Material properties: Si3N4, stainless, PTFE, PEEK.
• Lubrication for vacuum/cleanroom and high‑temp service.
• Dimensional tables and application interchange.

How to use

1. Define environment (vacuum, acids, wash‑down) and duty cycle.
2. Select ceramic/hybrid architecture and cage material.
3. Choose lubrication strategy (dry/solid‑film/minimal).
4. Verify fits and thermal expansion compatibility.

Best practices

• Keep assembly ultra‑clean; avoid particle contamination.
• Match CTE of shaft/housing to protect preload.
• Prevent electrical arcing; hybrids provide insulation.
• Validate temperature rise in staged load tests.