The Omega ER25 Collet with sealed high‑pressure coolant is a precision toolholding solution designed for professional shops, engineers, and hobbyists who require dependable cooling and ultra-accurate tool retention. It clamps tools from 3 mm to 16 mm with run-out under 10 microns, enabling repeatable, high‑quality milling and drilling results.

Newer versions use an all‑metal seal with no rubber nose seal, delivering durable performance in tough coolant environments. The seal is rated for high‑pressure cooling up to 120 bar, ensuring reliable coolant delivery through the tool while maintaining rigid, precise clamping. The longitudinal slots are designed so they do not overlap at the centre, preventing coolant loss and preserving pressure during operation.

• Ultra-precise run-out (<10 μm): Delivers highly repeatable tool paths, tighter tolerances, and smoother finishes across the 3–16 mm clamping range.
• High-pressure coolant seal (up to 120 bar): Integral metal seal provides reliable cooling under demanding pressure; newer versions forego the nose rubber seal for improved durability.
• Leak‑resistant slot geometry: Longitudinal slots do not overlap at the centre to prevent coolant loss; for best results, use only round shank tooling with no clamping flats to maintain a full seal.

This sealed ER25 collet supports efficient, high‑quality production by combining precise toolholding with robust coolant performance. It helps you reduce downtime from leaks, improve surface quality, and extend tool life, making it a reliable choice for demanding applications that require consistent results and efficient coolant management. Ensure you pair it with round shank tools (no clamping flats) to maintain optimal sealing and performance.