The Omega ER40 Collet with coolant seal is a precision tool accessory designed for milling, drilling, and other machining tasks that demand reliable coolant containment and tight tolerances. It’s ideal for engineers, machinists, workshops, and hobbyists who need consistent performance under high-pressure cooling while keeping cutting tools aligned and secure.

• Ultra-precision run-out (≤10 μm): Delivers stable tool guidance at speed, helping achieve accurate holes, cleaner finishes, and repeatable results across demanding milling and drilling operations.
• High-pressure coolant sealing (up to 120 bar): Integrated metal seal minimizes coolant leaks and ensures effective cooling at the cutting edge. Newer versions use a metal-only nose seal (no rubber), reducing maintenance needs while maintaining reliability. The design also features non-overlapping longitudinal slots to prevent coolant loss during operation.
• Wide clamping range with round-shank guidance (3–26 mm): Versatile for a broad range of tooling sizes, while requiring round-shank tooling with no clamping flats to preserve the seal and integrity of cooling delivery.

This sealed ER40 collet setup helps you maintain consistent performance, reduce downtime from coolant leaks, and achieve cleaner, more accurate results in high-speed machining. By combining precise clamping, robust coolant containment, and a straightforward round-shank requirement, it supports reliable production workflows and improved tool life in demanding applications.