Omega ER40 Collet with coolant seal is a precision toolholding solution designed for serious machining needs. It delivers tight, repeatable grip across a broad clamping range while ensuring effective cooling and low run-out, making it suitable for engineers, machinists, and workshops that require reliable performance in demanding applications.

Newer versions feature a metal seal with no rubber seal on the nose, and the design uses non-overlapping longitudinal slots to minimize coolant loss. For optimal sealing, pair the collet with round shank tooling that has no clamping flats.

• Ultra-precise run-out: less than 10 μm run-out to improve tool accuracy, surface finish, and repeatable part quality across jobs.
• High-pressure coolant sealed design: designed to handle up to 120 bar, with an integral metal seal that enhances cooling effectiveness and reduces the risk of coolant leaks. Newer versions omit the rubber nose seal for improved durability.
• Leak-preventing slot geometry and round-shank guidance: longitudinal slots do not overlap at the centre to prevent coolant loss; for best results, use only round shank tooling with no clamping flats, otherwise the seal is compromised.

With a 3–26 mm clamping range and a robust, coolant-tight interface, this ER40 collet helps you move from setup to finished part faster, delivering consistent performance, reduced downtime, and reliable results in high-pressure cooling environments.