Omega Products ER40 Collet Coolant Sealed Standard Precision is a precision toolholding solution designed for CNC milling, drilling, and routine workshop use. It holds round shank tooling firmly while containing coolant, helping you achieve consistent finishes and clean operations. Built for engineers, machinists, buyers, and hobbyists, this collet delivers reliable retention and precise performance in everyday production environments.

• Ultra-precise coolant-sealed performance: Achieves <10 μm run-out for tight tolerances and smooth, repeatable finishes across a wide range of cuts.
• Wide clamping range (3–26 mm): Broad compatibility with standard round shank tools, reducing the need for multiple collets and speeding up setups.
• Leak-resistant seal design: Non-overlapping longitudinal slots at the center minimize coolant loss; to maintain the seal, use only round shank tooling with no clamping flats (tools with flats render the seal ineffective).

This coolant-sealed ER40 collet is engineered for dependable performance in demanding milling and drilling tasks. It supports cleaner coolant containment, faster tool changes, and consistent results, giving you confidence to push for tighter tolerances and better surface finishes on every job.