Omega Products ER20 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -3mm

The Omega ER20 Collet is a coolant-sealed, standard-precision tool holder designed for ER20 chucks and round-shank tooling. It provides secure, repeatable grip for CNC milling and related operations with a clamping range of 3–13 mm.

Its precision is stated as less than 10 μm run-out, delivering consistent tool alignment across setups. Note that newer versions have no rubber seal on the nose. The design uses non-overlapping longitudinal slots to minimize coolant loss. For best results, use only round-shank tooling with no clamping flats—tools with flats will render the seal ineffective.

• Sub-10 μm run-out precision: Delivers highly consistent tool positioning for repeatable, clean cuts.
• Wide 3–13 mm clamping range: Covers a broad set of round-shank tools, enabling quick changes without swapping hardware.
• Coolant-sealed, leak-resistant design: Non-overlapping longitudinal slots prevent coolant from escaping at the center, helping keep your work area clean and reducing maintenance. Newer versions have no rubber seal on the nose; for a complete seal, use only round-shank tooling with no clamping flats.

With this ER20 coolant-sealed collet, you gain reliable clamping, improved surface finish, reduced downtime, and a smoother workflow. The combination of tight run-out, broad tool compatibility, and a sealed coolant path helps you complete jobs faster with consistent results, whether you're in a professional shop or a DIY workspace.