The Omega ER25 Collet Coolant Sealed Ultra Precision is a coolant-fed toolholding solution built for milling and precision machining. It achieves ultra-low run-out (<10 μm) and supports high-pressure coolant up to 120 bar, with a clamping range of 3–16 mm and a 7 mm shank size. Newer versions have no rubber seal on the nose, and the longitudinal slots are arranged to avoid overlap at the center to minimize coolant loss. For best results, use only round shank tooling with no clamping flats; tooling with flats will render the seal ineffective.

• Ultra-precise run-out (<10 μm): Ensures consistent tool positioning for superior surface finish and tighter tolerances across batches.
• High-pressure coolant seal (up to 120 bar): Integrated metal seal with non-overlapping slots minimizes coolant leakage and chip migration under flood cooling.
• Broad clamping range (3–16 mm) with 7 mm shank: Versatile fit that covers common small-diameter tooling while maintaining stiffness and repeatable grip.

This combination of precision run-out, robust coolant containment, and versatile clamping range helps you streamline setups, reduce scrap, and speed cycles. The sealed design protects the spindle from coolant ingress, lowers chip packing around the nose, and delivers reliable performance even in demanding materials. With a durable ER25 interface and a focus on consistent grip, you can trust this collet to perform consistently across shifts and jobs, improving overall workflow and tool life.