The Omega ER20 Collet Coolant Sealed Ultra Precision is a high-performance toolholding solution designed for milling and precision machining that relies on clean, high-pressure coolant delivery. Ideal for shops, engineers, and serious hobbyists, it delivers precise, repeatable clamping across a wide range of small to medium tool sizes, including a compact 9mm option. With ultra-low run-out and a robust coolant seal, it helps you achieve tight tolerances and nice surface finishes even under demanding cuts.

Newer versions feature a durable metal seal at the nose and a non-overlapping slot pattern to protect against coolant leakage at up to 120 bar. The design is optimized for use with round shank tooling (no clamping flats) to maintain the seal and maximize performance. The collet covers a clamping range of 3–13 mm, delivering reliable grip and consistent results through extended production runs.

• Ultra-precise run-out (<10 μm): ensures tight, repeatable tolerances and smooth cutting action for accurate part dimensions and superior surface finish.
• High-pressure coolant sealing up to 120 bar: integral metal seal minimizes leakage during aggressive cooling, improving tool life and chip evacuation.
• Durable nose and secure sealing design: non-overlapping longitudinal slots prevent coolant loss; newer versions remove the rubber seal for durability; use only round shank tooling (no clamping flats) to maintain the seal and reliable performance.

This combination of precision, robust sealing, and careful tooling compatibility helps you reduce downtime, achieve better part quality, and maintain consistent performance across multi‑part runs. It’s a dependable choice for anyone who requires reliable toolholding under high coolant pressure without sacrificing accuracy.