Omega's ER40 Collet with Integrated High-Pressure Coolant Seal delivers precision, durability, and coolant control for milling, drilling, and precision machining. It’s engineered for a wide range of tooling, including 10 mm shanks, and supports round tooling from 3 mm to 26 mm with a run-out of less than 10 microns, helping you achieve cleaner cuts and tighter tolerances.

Newer versions use a rubber-seal-free nose for reduced maintenance, and the design features non-overlapping longitudinal slots at the center to prevent coolant loss during operation. To ensure a proper seal, use only round shank tooling with no clamping flats—tooling with flats can render the seal ineffective.

• Ultra-precise run-out: Achieves ≤10 μm run-out for consistent tool positioning, resulting in repeatable tolerances and better surface finish on a variety of materials.
• High-pressure coolant sealing: Integral metal seal supports coolant pressures up to 120 bar, helping keep chips and coolant away from critical joints for cleaner machining and longer tool life.
• Robust, leak-resistant construction: Rubber-seal-free nose (in newer versions) and non-overlapping center slots reduce leakage and wear; for best results, pair with round shank tooling (no clamping flats) to maintain seal integrity.

This sealed ER40 collet is designed to boost workflow in production or precision work by delivering reliable grip, excellent coolant management, and long-term durability. It helps reduce downtime from leaks and misalignment, improves cut quality and consistency, and supports faster setup with confidence in repeatable results across multiple jobs.