Techniks 04220-11.5 ER20 Collet 11.5mm

Product Description

The TECHNIKS 04220-11.5 is an ER20 series collet designed for precision workholding in CNC machining centers, milling machines, and toolholding applications. Built to an 11.5mm collet size, it delivers a Total Indicator Runout (TIR) of 0.005mm, making it suitable for operations where concentricity and repeatability are critical. Through-coolant capability allows cutting fluid to pass directly through the collet to the cutting tool, improving chip evacuation and extending tool life in demanding cutting conditions. This collet is installed and serviced by machinists and CNC tooling technicians.

The 04220-11.5 fits ER20 collet chucks and toolholders used in standard machining center setups. Its 11.5mm bore accommodates round shank tooling at that diameter. Through-coolant compatibility makes it well suited for deep-cavity milling, drilling, and reaming operations where direct coolant delivery to the cutting zone is required. It is appropriate for both light-duty and production-volume machining environments.

Key Features

• ER20 collet series for broad toolholder compatibility
• 11.5mm collet size for precise round-shank tool clamping
• TIR of 0.005mm for high concentricity and repeatable tool positioning
• Through-coolant design channels fluid directly to the cutting tool
• Lightweight at 0.1 pounds for easy handling during tool changes

Compatibility

Designed as a direct-fit replacement or addition for ER20-compatible collet chucks and toolholders accepting 11.5mm collets.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. The collet should be seated properly into the ER20 nut before insertion into the chuck body - never torque a collet into a chuck without the tool inserted. Ensure the collet chuck and spindle are fully powered down and the machine is in a safe state before performing any tooling changes. Inspect the collet bore and chuck taper for chips or damage prior to assembly.