The Omega ER40 Collet Coolant Sealed, Standard Precision is a precision toolholding solution designed for CNC milling and drilling. It securely grips round shank tools across a 3–26 mm range while retaining coolant to keep your work area cleaner and your tools cooler.

With an ultra-tight run-out specification under 10 microns, this collet delivers repeatable accuracy from job to job. Note that newer versions have no rubber seal on the nose; to maintain a proper seal, use only round shank tooling with no clamping flats—tools with flats can render the seal ineffective.

• Sub-10 μm run-out for precise toolholding: Provides exceptional holding accuracy to improve cut quality and consistency across multiple passes and parts.
• Coolant-sealed design with leak-resistant slots: Longitudinal slots do not overlap at the centre to prevent coolant loss, helping keep your spindle and work area clean; newer versions feature no nose rubber seal for simplified maintenance.
• Wide clamping range for reliable versatility: Accepts tools from 3 to 26 mm, offering flexible compatibility with a broad range of round shank tooling while maintaining a stable, durable grip.

This coolant-sealed ER40 collet delivers reliable, repeatable performance in demanding machining applications, helping you reduce downtime, maintain cleaner operations, and achieve consistent results across jobs with confidence in every setup.