The Omega ER40 Collet Coolant Sealed Ultra Precision is a high-precision toolholding solution designed for milling, drilling, and finishing tasks where coolant needs to be delivered directly to the cutting edge. It securely grips round shank tooling with exceptionally low run-out, helping you achieve cleaner finishes and longer tool life in demanding environments.

Key specs include a clamping range of 3–26 mm, run-out under 10 μm, and a high-pressure coolant capability up to 120 bar. Newer versions use a robust metal seal on the nose (no rubber seal), enhancing durability under heavy coolant flow. To ensure the seal functions correctly, use solely round shank tooling with no clamping flats—tools with flats can render these collets ineffective.

• Ultra-Precise Run-Out: Achieves run-out of ≤10 μm for repeatable tool positioning and consistently accurate finishes across production runs.
• High-Pressure Coolant Sealing: Integral metal seal supports coolant pressures up to 120 bar, delivering coolant directly to the cutting edge for improved cooling and chip evacuation.
• Leak-Resistant Design with Wide Range: Longitudinal slots are designed to avoid overlap at the centre to prevent coolant loss, while offering a 3–26 mm clamping range; for optimal performance, use round shank tooling with no clamping flats to maintain the seal.

This collet delivers reliable, repeatable performance in demanding machining tasks by combining tight run-out, robust coolant delivery, and a seal-focused design that minimizes downtime and maintenance. It’s a dependable choice for engineers, shop floor technicians, and craftsmen who demand precision and efficiency in every cut.