The Omega ER20 Collet with High-Pressure Coolant Sealing is a precision toolholding solution for CNC mills and machining centers. It delivers ultra-precise run-out (less than 10 μm) and a dedicated coolant path to keep tooling cool and chips under control during demanding cuts. With a clamping range of 3–13 mm, it covers a wide variety of round-shank tools while maintaining secure, repeatable grip. Note: to maintain the seal, use only round shank tooling with no clamping flats; tooling with flats can render the collet ineffective.

• Ultra-precise run-out: Less than 10 μm run-out for repeatable accuracy across passes and tight tolerances.
• High-pressure coolant sealing: Sealed to handle up to 120 bar coolant pressure; newer versions replace rubber nose seals with a durable metal-based seal for improved reliability.
• Non-overlapping slots for reliable cooling: Longitudinal slots do not overlap at the center to prevent coolant loss, ensuring consistent cooling when used with round shank tooling (no clamping flats).

By delivering secure, low-runout toolholding and effective coolant containment, this collet helps you achieve consistent finishes, reduce setup time, and keep tooling sessions productive. The combination of ultra-low run-out, high-pressure coolant capability, and a 3–13 mm range makes it a dependable choice for demanding milling tasks in both production environments and precision workshops.