Techniks 04216-02.5 ER16 Collet 2.5mm Bore

Product Description

The TECHNIKS 04216-02.5 is an ER16 series collet designed for precision CNC machining and toolholding applications. Sized for a 2.5mm bore, this collet delivers a maximum total indicator runout (TIR) of 0.005mm, making it suitable for close-tolerance work such as drilling, reaming, and light milling. Through-coolant capability allows cutting fluid to pass directly through the collet to the tool tip, improving chip evacuation and tool life in demanding operations. Machinists and CNC setup technicians are the primary installers of this component.

This ER16 collet fits standard ER16-compatible collet chucks used in CNC machining centers, milling machines, lathes, and toolroom equipment. The ER16 series is widely used in light-duty to medium-duty machining environments where compact toolholding and high concentricity are required. The 2.5mm bore accommodates small-diameter cutting tools including drills, end mills, and reamers of the corresponding shank size.

Key Features

• ER16 collet series with 2.5mm bore for small-diameter toolholding
• Maximum TIR of 0.005mm for high-concentricity, close-tolerance machining
• Through-coolant design channels cutting fluid directly to the tool tip
• Compact ER16 form factor suitable for a wide range of CNC spindle applications

Compatibility

Designed as a direct-fit collet for standard ER16-compatible collet chucks and toolholding systems.

Installation Notes

ER collets are installed and removed by qualified machinists or CNC toolroom technicians. Always ensure the spindle or chuck is fully stopped and the machine is in a safe, locked-out state before changing collets. Use the appropriate ER16 collet nut and spanner wrench for proper seating and clamping force. Do not exceed the collet clamping range or install tools with shank diameters outside the rated bore size.