Omega ER40 Collet with coolant seal delivers ultra-precise toolholding in a compact 19 mm size, built for high‑pressure cooling environments. It is ideal for engineers, machinists, and workshops that demand repeatable accuracy and reliable coolant delivery across a 3–26 mm tool range, backed by a robust 120 bar clamping system.

With an ultra-tight run-out specification of under 10 microns and an integral metal seal, this collet keeps coolant right where it’s needed at the cutting edge. Newer versions remove the rubber nose seal for improved reliability, and the design includes non-overlapping longitudinal slots to minimize coolant loss. To preserve the seal and performance, use only round-shank tooling with no clamping flats—tools with flats will render the collet ineffective.

• Ultra-precise run-out and sealing performance: Achieves <10 μm run-out to ensure concentric cutting and repeatable finishes, while maintaining a reliable coolant seal during demanding milling and drilling.
• High-pressure coolant seal and center-slot design: Integral metal seal supports cooling up to 120 bar; non-overlapping longitudinal slots prevent coolant loss at the center, with newer versions avoiding rubber nose seals for greater reliability.
• Wide clamping range with round-shank requirement: Accepts tools in the 3–26 mm range and is designed to seal only with round-shank tooling; tools with clamping flats will compromise the seal and performance.

This collet model helps you maintain precise tool alignment, sustain effective cooling, and deliver consistent results across parts. The combination of ultra-tight run-out, robust high‑pressure sealing, and careful tooling requirements reduces variance, lowers maintenance concerns, and supports faster, more dependable production workflows.