Omega Products ER40 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -5mm

Omega ER40 Collet is a standard precision, coolant-sealed toolholder designed for ER40 milling and drilling setups. It delivers sub-10 micron run-out to ensure repeatable accuracy and consistent tool location across a range of cutters. With a clamping range of 3–26 mm, it’s a versatile choice for shops and hobbyists who value clean coolant control and dependable grip on their tooling.

Note: Newer versions have no rubber seal on the nose. To maintain the coolant seal, ensure you are using solely round shank tooling with no clamping flats, as toolshanks with flats will render these collets ineffective. The design also features non-overlapping longitudinal slots at the centre to prevent coolant loss, helping keep your work area cleaner and reducing downtime from leaks.

• Sub-10 μm run-out: Delivers exceptionally tight, repeatable accuracy for precise hole locations, clean finishes, and reliable part-to-part consistency.
• Leak-preventing coolant seal: Longitudinal slots are arranged so they do not overlap at the center, reducing coolant loss and mess during machining.
• Wide clamping range for round shanks: 3–26 mm capacity supports a broad set of cutters; optimum performance when paired with round-shank tooling to maintain a secure, repeatable grip.

This coolant-sealed ER40 collet is built for real-world machining—delivering stable performance, cleaner operations, and dependable results across daily production and hobbyist projects alike. With its precise hold and thoughtful seal design, you can streamline tool changes, minimize cleanup time, and focus on achieving the best possible finishes and tolerances.