The Omega ER40 Collet Coolant Sealed Ultra Precision (17 mm) is designed for engineers, machinists, and shops that demand dependable toolholding and clean, high‑pressure coolant delivery. With ultra‑low run‑out and a robust metal seal, it keeps cutting tools precisely positioned even under demanding machining conditions.

This version supports high‑pressure coolant up to 120 bar and clamps tools across a 3–26 mm range, delivering consistent performance for a wide variety of jobs. Note that newer versions have no rubber seal on the nose, and the longitudinal slots are arranged so they do not overlap at the center to prevent coolant loss. For best results, use only round shank tooling with no clamping flats; tooling with flats can render the seal ineffective.

• Ultra-precision run-out with high-pressure coolant seal: Delivers <10 μm accuracy and up to 120 bar coolant pressure, ensuring the cutting tool stays true for clean finishes and longer tool life.
• Leak-free coolant path with durable construction: Integral metal seal and non‑overlapping longitudinal slots prevent coolant from escaping, reducing leaks and keeping the work area cooler and cleaner.
• Wide clamping range for round‑shank tooling: Clamps tools from 3–26 mm; to maintain the seal, use solely round shank tooling with no clamping flats—flats can compromise performance.

By combining precision, reliability, and clean coolant management, this collet reduces downtime, improves surface finish consistency, and increases overall machining productivity. The robust metal seal and thoughtful slot geometry help maintain coolant effectiveness across cycles, while the broad 3–26 mm clamping range supports quick, confident setups.