Designed for CNC milling and precision toolholding, the Omega ER40 Collet Coolant Sealed Standard Precision delivers secure gripping with minimal run-out and controlled coolant flow. With a clamping range of 3–26 mm and a run-out of under 10 μm, it helps you maintain tight tolerances and consistent finishes across a range of tools.

Note: newer nose designs remove the rubber seal. To preserve the coolant seal, use only round shank tooling with no clamping flats; tools with flats will render the seal ineffective.

• Ultra-low run-out: Delivers <10 μm run-out for tight tolerances and superior surface finishes, reducing part rework and increasing consistency across batches.
• Leak-free coolant seal design: Longitudinal slots do not overlap at the center to prevent coolant loss, keeping your work area cleaner and coolant usage efficient.
• Wide clamping range for round shanks: 3–26 mm capacity supports a variety of tool sizes; designed for round shank tooling with no clamping flats to maintain the seal and reliability.

By choosing this coolant-sealed ER40 collet, you gain reliable toolholding, consistent results, and cleaner coolant management, enabling smoother workflows, fewer disruptions, and faster production cycles.