The Omega ER40 Collet Coolant Sealed Standard Precision delivers reliable, high-precision toolholding for CNC milling and drilling. Engineered for round-shank tooling, it provides sub-10 micron run-out to help you achieve tighter tolerances and better surface finish while keeping coolant where it belongs.

Designed for a broad range of operators—from engineers to tradespeople—the clamping range covers 3–26 mm, making it a versatile choice for common end mills and drills. This standard coolant-sealed collet includes a rubber seal on the nose to help contain coolant during operation; note that newer variants may omit the rubber nose seal, so verify compatibility with your setup.

• Sub-10 μm run-out: Delivers exceptional concentricity for accurate hole sizes and smoother finishes, reducing rework and improving part quality.
• Efficient coolant sealing: Longitudinal slots are designed to avoid center overlap, helping prevent coolant loss and keeping your work area cleaner and more productive.
• Wide clamping range for round-shank tooling: Accepts 3–26 mm tools with a secure, round-shank grip—use only round shanks with no clamping flats to maintain the seal and performance.

This collet is built to support consistent performance across demanding machining tasks, reducing downtime from coolant leaks and tool movement while simplifying tool changes. Whether you’re refining tolerances on a precision part or boosting through-put on a busy shop floor, this coolant-sealed ER40 collet helps you achieve reliable results with confidence.