Omega Products ER11 Collet Coolant Sealed Ultra Precision - 10 Micron Run-Out - 5.5mm

Introducing the Omega ER11 Collet with coolant sealing in a precise 5.5mm size. This collet delivers ultra-precise tool retention with run-out under 10 microns, making it ideal for engineers, machinists, and hobbyists who demand clean finishes and dependable performance in CNC milling and drilling. It supports standard 3–7 mm tooling shanks, pairing well with high-speed spindles where coolant efficiency matters.

Key design choices include a high-pressure coolant seal rated up to 120 bar and an integral metal seal (newer versions have no rubber seal on the nose). The center design features longitudinal slots that do not overlap, preventing coolant from leaking into the spindle or work area. For best sealing performance, use only round-shank tooling with no clamping flats; tools with flats can render the seal ineffective.

• Ultra-precise run-out (<10 μm): Delivers repeatable hole sizes and a superior surface finish, even on small-diameter tools.
• High-pressure coolant seal up to 120 bar: Keeps coolant precisely where it’s needed, reducing thermal distortion and chip buildup for cleaner cuts and longer tool life.
• Leak-resistant center-slot design with round-shank requirement: Non-overlapping centre slots prevent coolant loss; newer versions omit the rubber nose seal to maximise reliability—still requires round shanks with no flats for optimal sealing.

This ER11 coolant-sealed collet is built to streamline demanding workflows: tighter tolerances mean less rework, faster cycles, and consistent results across jobs. The robust, metal-sealed design minimizes maintenance and downtime while delivering dependable performance in challenging environments. Perfect for precision milling and micro-drilling tasks, it provides peace of mind that your tooling stays secured and coolant stays in the cut.