Omega Products ER25 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -5mm

The Omega ER25 Collet is a coolant-sealed, standard-precision tool holder designed for milling and drilling with ER25 tooling. It clamps round shank tools in the 3–16 mm range, delivering consistent seating, tight run-out, and clean finishes across a wide variety of applications. This makes it an ideal choice for engineers, makers, and shop floor technicians who value reliable performance and straightforward setup.

Note: some versions include a rubber seal on the nose, while newer versions do not. The design features longitudinal slots that do not overlap at the center to prevent coolant loss into the spindle, helping keep your machine tidy and reducing maintenance. For best results, use solely round shank tooling with no clamping flats—tools with flats will render the seal ineffective.

• Ultra-low run-out (<10 μm): Maintains precise tool alignment for accurate, repeatable milling and drilling finishes across jobs.
• Effective coolant sealing: Non-overlapping center slots prevent coolant leakage into the spindle, reducing mess and downtime for maintenance.
• Wide clamping range with round-shank compatibility: 3–16 mm range supports common tooling sizes; ensure round shanks with no clamping flats for reliable, seal-friendly performance.

This coolant-sealed ER25 collet set helps you keep workflows smooth, minimizes rework from tolerance drift, and supports consistently high-quality results. With robust construction and thoughtful seal design, it’s a dependable choice for demanding machinists and hobbyists alike.