Omega Products ER20 Collet Coolant Sealed Ultra Precision is a high-precision toolholder designed for demanding milling applications where coolant delivery and tight tolerances matter. Built for engineers, machinists, and workshop professionals, it provides secure tool holding with reliable cooling to help you achieve consistent, high-quality results.

• 10 micron run-out for repeatable precision: Delivers exceptionally tight run-out to improve surface finish and dimensional accuracy, reducing chatter and tool wear across repeated passes.
• High-pressure coolant sealed design (up to 120 bar): Features an integral metal seal and non-overlapping slots that prevent coolant loss, ensuring consistent cooling and debris clearance even in demanding cuts. Newer versions have no rubber seal on the nose.
• Broad 3–13 mm clamping range for round shanks: Supports a versatile range of tools with a secure grip, while the round-shank requirement (no clamping flats) maintains the integrity of the seal for reliable performance in tough machining environments.

This sealed ER20 collet is built to improve workflow and results: it channels coolant directly to the cutting edge, promotes efficient chip evacuation, and maintains precise tool alignment under load. The combination of ultra-low run-out, high-pressure sealing, and a flexible clamping range helps you finish parts more consistently, reduce downtime, and extend tool life in challenging materials and high-speed operations.