The Omega ER25 Collet with High-Pressure Coolant Sealed Ultra Precision is a purpose-built toolholding solution for CNC milling and drilling where relentless cooling and tight tolerances matter. Designed for the ER25 family with a 14 mm size designation, it clamps tools in the 3–16 mm range and delivers run-out under 10 microns for consistently accurate results.

Built for demanding machining environments, this collet features an integral metal seal and a capability for high-pressure coolant up to 120 bar. The design includes longitudinal slots that do not overlap at the center, reducing coolant leakage and helping maintain coolant delivery exactly where you need it. Newer versions use a robust metal seal on the nose (no rubber seal), enhancing durability in tough applications. To preserve the seal’s effectiveness, use only round shank tooling with no clamping flats; tools with flats can render the seal ineffective.

• High-Pressure Sealed Coolant Delivery: Maintains reliable coolant delivery up to 120 bar with an integral metal seal, directing coolant precisely to the cutting edge and minimizing leaks thanks to the non-overlapping slot design.
• Ultra-Low Run-Out: Delivers run-out under 10 μm, helping achieve tighter tolerances, smoother finishes, and more repeatable results across the 3–16 mm tool range.
• Slot Design & Shank Compatibility: The non-overlapping longitudinal slots reduce coolant loss, while the seal integrity requires round shank tooling with no clamping flats to keep the system effective and durable.

This collet is designed to improve machining outcomes by providing consistent cooling, precise tool retention, and a robust build that stands up to high-pressure environments. By reducing coolant leakage, maintaining tight run-out, and offering a broad clamping range, it helps you shorten setup times, minimize-tool wear, and achieve reliable, repeatable results across a variety of jobs.