The Omega ER40 Collet is a coolant-sealed, standard-precision tool holder designed for CNC mills and turning centers that demand consistent, accurate performance. It delivers sub-10 micron run-out and a broad clamping range for round-shank tooling, making it a reliable choice for engineers, machinists, and hobbyists who want repeatable results.

• Ultra-low run-out: Delivers less than 10 μm of run-out to ensure precise tool alignment, repeatable finishes, and tighter tolerances across multiple passes.
• Coolant-sealed design: Longitudinal slots are arranged to prevent coolant loss at the center, keeping your work area cleaner; newer versions have no rubber seal on the nose to simplify maintenance without compromising sealing performance.
• Wide clamping range (3–26 mm) and ER40 compatibility: Supports a broad range of round-shank tooling, enabling quick setup and reducing tool changes for improved workflow and productivity.

With this collet, you gain dependable, repeatable performance that helps cut setup time, reduce downtime from leaks, and deliver consistent results across parts. Its robust construction and precise grip on round-shank tools help you move smoothly from first cut to final finish, enhancing overall efficiency in your shop.