The Omega ER40 Collet Coolant Sealed offers precise, coolant-fed toolholding designed for ER40 spindles. Built for engineers, machinists, hobbyists, and workshop professionals, it provides reliable round-shank tool retention with consistently tight run-out to improve hole quality and surface finish.

Designed for coolant-enabled machining, this collet features a seal arrangement that minimizes leaks. Newer versions have no rubber nose seal, and the longitudinal slots are positioned to prevent coolant from escaping at the center. For the seal to function correctly, use only round-shank tooling with no clamping flats.

• Ultra-low run-out (<10 μm): Delivers highly accurate tool positioning for repeatable holes, smoother finishes, and reduced rework across production runs.
• Coolant-sealed design: The slot arrangement prevents coolant loss, helping keep the spindle area cleaner and protecting bearing life; newer versions remove the nose rubber seal for simpler maintenance.
• Wide clamping range for round tooling (3–26 mm): Supports a broad set of round-shank tools without changing holders; maintain optimum sealing by using round shanks only and avoiding clamping flats.

With this collet, you gain reliable, repeatable performance that speeds setup, reduces downtime, and improves overall machining results. Its robust construction and thoughtfully designed seal provide steady accuracy across a range of materials and applications, making it a dependable choice for daily use in any workshop or production environment.