Omega Products ER40 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -14mm

The Omega ER40 Collet is a coolant-sealed, standard-precision tool holder designed for CNC mills and workshop machines. It delivers sub-10 micron run-out to ensure accurate tool seating and repeatable results, making it a reliable choice for quality-focused milling, drilling, and finishing tasks. Built for both professional shops and serious hobbyists, it offers dependable performance in coolant environments where cleanliness and precision matter.

With a clamping range of 3–26 mm, this collet accommodates a wide variety of round-shank tooling, helping you reduce tool changes and inventory. Note that newer versions have no rubber seal on the nose. To ensure the seal functions properly, use only round shank tooling with no clamping flats; tools with flats will render the seal ineffective. The design also features non-overlapping longitudinal slots at the center to prevent coolant leakage, keeping the spindle area cleaner and reducing downtime.

• Ultra-precise run-out (<10 μm): Delivers consistent tool positioning for tight tolerances, improved surface finish, and longer tool life in demanding operations.
• Coolant-sealed, non-leaking design: Longitudinal slots that do not overlap at the centre prevent coolant loss, reducing mess and protecting both tool and spindle.
• Wide clamping range (3–26 mm): Supports a broad spectrum of round-shank tooling, enabling greater flexibility and fewer collet swaps in busy shops.

This collet helps you maintain reliable performance across jobs, streamline tool compatibility, and keep your workspace cleaner by minimizing coolant leaks. Whether you’re setting up new work, completing high-precision tasks, or training operators, you can rely on its durable construction and predictable behavior to deliver steady results and smoother workflows.