Omega Products ER25 Collet Coolant Sealed Ultra Precision - 10 Micron Run-Out - 4mm

Omega ER25 Collet Coolant Sealed Ultra Precision is a high‑reliability toolholder designed for mills and demanding drilling applications where coolant pressure and precision matter. Built for engineers, technicians, and serious hobbyists, it delivers tight run-out and secure tool seating while efficiently delivering coolant to the cutting edge. With a 120 bar clamping capability and run-out under 10 microns, this collet helps you maintain accuracy and finish quality across tough jobs. Newer versions omit the rubber nose seal, relying on an integral metal seal and a non‑overlapping slot design to minimize coolant loss and improve durability.

• Ultra-precise coolant-sealed performance: Delivers sub‑10 μm run-out with the advantage of high‑pressure coolant up to 120 bar for cleaner cuts and consistent tool control at speed.
• Leak‑proof, durable seal design: Features an integral metal seal and a non‑overlapping longitudinal slot arrangement that prevents coolant leakage, even under heavy cuts; newer versions have no rubber nose seal for increased reliability.
• Wide clamping range with round‑shank compatibility: Accepts 3–16 mm tool shanks within the ER25 interface and requires round shanks with no clamping flats to maintain the seal and performance; using tooling with flats will render the collet ineffective.

This combination translates into faster setup, fewer interruptions for coolant leakage, and repeatable results across multiple tools and jobs. The sealed design helps maintain coolant delivery exactly where it’s needed, supporting better chip evacuation and surface finishes while reducing downtime and rework. Ideal for precision milling, fine drilling, and any application where consistent grip and accurate geometry matter, this ER25 coolant-sealed collet is a dependable choice for professional shops and serious makers alike.