The Omega Products ER11 Collet Ultra Precision is a high-precision toolholding accessory designed for ER11 collet chucks. It’s built for machinists, fabricators, engineers, and hobbyists who demand consistent, concentric clamping of round-shank tools during milling, drilling, and precision machining.

With a guaranteed 5 micron run-out, this collet delivers exceptional concentricity for tighter tolerances, smoother tool paths, and cleaner finishes. It covers the 6.5mm – 6mm size range, making it suitable for a wide variety of common round shanks and helping minimize setup time when swapping tools.

• Ultra-low 5 micron run-out: Ensures precise, concentric engagement between tool and chuck, yielding tighter tolerances and superior surface finishes.
• Secure, repeatable clamping: Precision geometry provides consistent grip across cycles, reducing tool slip and drift during demanding cuts.
• ER11 compatibility with 6.5mm – 6mm range: Designed to work with standard ER11 chucks and corresponding tool shanks, enabling quick setups and versatile use with fewer changes.

This collet helps you streamline setups, cut rework, and achieve dependable results across a range of machining tasks—from precision metalworking to hobbyist fabrication. Rely on steady performance, consistent results, and peace of mind in every project.