Omega Products ER25 Collet Coolant Sealed Ultra Precision - 10 Micron Run-Out - 9mm

The Omega ER25 Collet with integrated high‑pressure coolant seal delivers exceptional precision and reliable coolant delivery for demanding milling, drilling, and routing tasks. This 9mm collet is designed for engineers, shop floor technicians, and hobbyists who need a secure grip on round-shank tooling and dependable coolant management, supporting tool sizes from 3–16 mm with a stable, repeatable clamping action.

With run-out accuracy better than 10 microns, you can achieve tight tolerances and superior surface finishes even on challenging materials. The newer versions feature a metal seal at the nose (no rubber seal) and non-overlapping longitudinal slots to prevent coolant loss at the center. To seal properly, ensure you are using round-shank tooling with no clamping flats—tools with flats will render the collet ineffective.

• Ultra-precise run-out (< 10 μm): ensures outstanding concentricity for high-precision milling and cleaner, more accurate machining results.
• High-pressure coolant seal up to 120 bar: keeps coolant contained within the collet system, reducing leaks and downtime while enabling deeper pockets and tougher materials.
• Sealed nose design for reliable coolant containment: newer versions use a metal seal (no rubber) with non-overlapping slots to prevent coolant loss; to maintain seal performance, use only round-shank tooling with no clamping flats.

This combination of ultra-precision run-out, robust coolant containment, and a compact 9mm form factor helps streamline setups, reduces downtime from leaks or tool chatter, and delivers repeatable results across a wide range of machining tasks. Ideal for shops aiming for consistent accuracy, efficient coolant management, and reliable tool retention in ER25 spindle systems, the Omega ER25 Collet is a dependable choice for both everyday and challenging manufacturing workloads.