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

The Omega ER20 Collet is a coolant-sealed, standard-precision tool holder designed for round-shank tooling up to 10 mm. It delivers sub-10 μm run-out for repeatable, accurate milling and drilling, with a clamping range of 3–13 mm that covers a wide range of tools. Newer versions omit the rubber seal on the nose; the core sealing relies on a non-overlapping arrangement of longitudinal slots to prevent coolant loss and keep the spindle area clean.

• Ultra-low run-out (<10 μm): Delivers precise concentricity for consistent tool engagement, resulting in better surface finish and fewer rejected parts.
• Coolant-sealed design with non-overlapping slots: The center-non-overlapping slot pattern minimizes coolant leakage, reducing mess and maintenance while keeping coolant where it's needed.
• Wide clamping range for round-shank tools (3–13 mm): Supports a broad family of end mills and drills, enabling faster setups and secure, repeatable grip with fewer tool changes.

With these features, you gain reliable, high-precision performance across jobs, cleaner machining environments, and improved workflow efficiency. The tight (<10 μm) run-out paired with robust coolant sealing helps extend tool life, improve surface quality, and reduce rework, giving you confidence to tackle demanding milling and drilling tasks.