The Omega ER40 Collet is a coolant-sealed, standard-precision toolholder built for ER40 tooling in CNC milling and precision machining. It securely clamps round-shank tools within a 3–26 mm range, delivering consistent grip and reliable performance in demanding workshop environments.

Designed for reliability under tough conditions, this collet delivers sub-10 μm run-out to help you achieve accurate cuts and clean finishes. The coolant-sealed design helps keep chips and coolant where they belong, protecting your spindle and extending tool life. Note that newer versions may omit the rubber seal on the nose; to maintain the seal, use only round-shank tooling with no clamping flats.

• Leak-proof coolant seal: Longitudinal slots do not overlap at the centre, preventing coolant loss and helping keep the work area cleaner and your spindle protected.
• Ultra-precise run-out: Less than 10 microns of run-out to improve hole size accuracy, surface finish, and repeatable results across jobs.
• Broad clamping range for round shanks: Accepts tools from 3 to 26 mm with a secure round-shank interface; to maintain the seal, use tooling without clamping flats.

With the Omega ER40 Collet, you gain dependable, repeatable performance that supports efficient workflows, reduces downtime, and delivers consistent results across a range of tooling and applications. This combination of precise grip, coolant management, and versatile clamping range helps you complete jobs faster with confidence.