Omega Products ER20 Collet Coolant Sealed Standard Precision - 10 Micron Run-Out -6mm

The Omega ER20 Collet is a coolant-sealed, standard-precision toolholder designed for round-shank tooling on CNC milling centers. It securely grips tooling from 3 mm to 13 mm (with the 6 mm variant featured in the title), delivering tight run-out for consistently accurate cuts across milling, drilling, and finishing tasks.

Newer versions have no nose rubber seal, and the collet uses a precise slot arrangement where the longitudinal slots do not overlap at the center to prevent coolant loss. For best performance, ensure you’re using solely round shank tooling with no clamping flats—tools with flats will render the seal ineffective.

• Coolant-Sealed Design: Non-overlapping longitudinal slots prevent coolant from leaking into the collet body, keeping the work area cleaner and protecting spindle bearings and tools.
• Ultra-Precise Run-Out (<10 μm): Delivers tight, repeatable tool seating for accurate milling and superior surface finish.
• Versatile 3–13 mm Clamping Range: Supports a wide range of round shank tooling (including 6 mm), offering flexibility in a single holder; to maintain the seal, use only round shank tools with no clamping flats.

This coolant-sealed ER20 collet arrangement helps you achieve reliable, repeatable results with fewer reworks, smoother tool engagement, and improved workflow efficiency. Its compact size and robust construction make it a dependable choice for professionals and hobbyists alike who demand precision, cleanliness, and consistent performance in everyday milling and drilling tasks.