Omega Products ER40 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -8mm

The Omega ER40 Collet is a standard coolant-sealed toolholding solution designed for precision milling and drilling. It’s built for engineers, machinists, hobbyists, and workshop professionals who need reliable, repeatable tool clamping with flood coolant. With a clamping range of 3–26 mm, it offers versatile compatibility for a wide range of round-shank tooling while maintaining consistent performance.

Note: newer versions have no rubber seal on the nose. The collet’s design features non-overlapping longitudinal slots at the center to prevent coolant loss, helping keep coolant contained and the work area cleaner during operation.

• Coolant-Sealed Design with Non-Overlapping Slots: The slots do not overlap at the centre to prevent coolant loss, keeping the work area cleaner and the toolholding stable during flood coolant milling.
• Wide 3–26 mm Clamping Range for Round Shanks: Accommodates a broad range of tools with round shanks, reducing the need for multiple collets. Use round shank tooling with no clamping flats to preserve the seal.
• High-Precision Run-Out (<10 μm): Delivers tight run-out for improved accuracy, smoother finishes, and repeatable results across jobs.

This coolant-sealed ER40 collet helps you work more efficiently by delivering reliable clamping, reducing tool changes, and maintaining coolant containment. The combination of tight run-out, versatile clamping range, and a design aimed at preventing leaks means fewer interruptions and more consistent results, whether you’re producing precise features or finishing passes. For best performance, ensure you’re using only round shank tooling without clamping flats to preserve the seal and overall effectiveness.