Engineered for precision CNC work, the Omega ER40 Collet with high‑pressure coolant sealing delivers ultra-stable toolholding and reliable cooling. Designed for engineers, machinists, fabricators, and serious hobbyists, it clamps round shanks from 3 to 26 mm and supports demanding cutting conditions with an integral metal seal. Note: newer versions have no rubber seal on the nose, reducing maintenance and simplifying reliability.

• Ultra-precise run-out (<10 μm): Delivers consistently accurate tool positioning and smoother finishes, reducing chatter and improving repeatable results across jobs.
• High-pressure coolant sealed design (up to 120 bar): The robust metal seal maintains coolant delivery under heavy use, enhancing cooling efficiency, chip control, and tool life.
• Leak‑resistant geometry with broad clamping range (3–26 mm): Non-overlapping longitudinal slots prevent coolant loss while accommodating a wide range of round shank tooling. For optimal performance, use only round shank tooling with no clamping flats; tooling with flats can render the seal ineffective.

This combination of tight run-out, durable coolant sealing, and versatile clamping range helps you achieve reliable, high-quality results with fewer interruptions. It supports faster setup, consistent finishes, and longer tool life, making it a dependable choice for precise milling and drilling tasks.