The Omega ER40 Collet Coolant Sealed Ultra Precision is a precision toolholding solution designed for high-pressure coolant milling. Compatible with ER40 tooling and a 20 mm bore, it covers a clamping range from 3 to 26 mm to suit a wide variety of cutting tools and applications. With run-out under 10 microns, this collet helps achieve tight tolerances and smooth, repeatable performance.

Its sealed design uses an integral metal seal to reliably deliver coolant directly to the cutting edge while withstanding demanding machining conditions. The system is built for higher pressure, helping to control heat and reduce chip buildup during aggressive milling.

• Ultra-precise run-out (<10 μm): Delivers consistent tool alignment for accurate milling and superior surface finish, reducing rework and scrap.
• High-pressure coolant sealed system (up to 120 bar): Directs coolant where it’s needed, maintaining stable toolholding and cooling during demanding cuts.
• Coolant-retention geometry with non-overlapping slots: Longitudinal slots do not overlap at the centre to minimize coolant loss; newer versions have no rubber seal on the nose for improved durability.

This collet design supports efficient, reliable productivity by enabling precise toolholding, effective cooling, and long-term durability. For best results, use only round shank tooling with no clamping flats to preserve the seal’s integrity and ensure optimal coolant delivery.