Omega Products ER25 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -11mm

The Omega ER25 Collet is a coolant-sealed, standard-precision toolholding solution designed for ER25 milling setups. It’s ideal for engineers, machinists, and hobbyists who need dependable clamping, clean coolant management, and repeatable results.

With an ultra-tight run-out of under 10 microns and a clamping range of 3–16 mm, this 11 mm interface collet provides versatile support for a wide range of tools. Note that newer versions have no rubber seal on the nose; to maintain the seal, use only round shank tooling with no clamping flats—tools with flats will render the seal ineffective. The design also features longitudinal slots that do not overlap at the center, helping to prevent coolant loss during operation.

• Ultra-precise run-out: Delivers less than 10 μm of run-out for repeatable toolholding, improving part consistency and extending tool life across multiple passes.
• Coolant sealing with non-overlapping slots: Central slots do not overlap, reducing coolant leakage and keeping work surfaces cleaner and machines protected.
• Wide clamping range with round-shank compatibility: 3–16 mm clamping range covers common tools; for optimal sealing, use round shank tooling with no clamping flats (note: newer versions have no rubber nose seal).

This collet helps streamline your workflow by delivering reliable, accurate clamping, minimizing downtime from leaks or tool run-out, and supporting a broad range of everyday milling tools. Its coolant-sealed design and precise grip contribute to better surface finishes, fewer interruptions, and consistent results across challenging jobs.