The Omega ER20 Collet with High-Pressure Coolant Seal is a precision toolholding solution designed for CNC milling and drilling where coolant efficiency and accuracy matter. Sized for 5 mm round-shank tools within a 3–13 mm clamping range, it delivers consistent grip, tight run-out, and reliable performance in demanding setups.

• Ultra-precise run-out (<10 μm): Ensures repeatable tool positioning and a smooth, accurate cut across multiple passes, reducing scrap and rework.
• High-pressure coolant seal (up to 120 bar): Integral metal seal keeps coolant contained at intensive pressures, minimizing leaks and mist for cleaner, cooler machining.
• Coolant-retaining slot design (round-shank only): Longitudinal slots are arranged to prevent coolant loss at the center; use only round-shank tooling with no clamping flats to maintain the seal—tools with flats can render the seal ineffective.

This sealed ER20 collet is built for durability in tough environments. Newer versions have no rubber seal on the nose, improving longevity under high-pressure coolant conditions. With its robust construction and precise grip, it supports consistent part quality, shorter cycle times, and a cleaner workspace—making it a reliable choice for production runs, prototyping, and precision work where every micron matters.