Techniks 04216-08.5 ER16 Collet 8.5mm Through Coolant

Product Description

The TECHNIKS 04216-08.5 is an ER16 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept ER16 toolholding systems. This collet holds workpieces or cutting tools with a clamping diameter of 8.5 millimeters and delivers a total indicator reading (TIR) of 0.005 mm, providing the runout precision required for accurate metal removal and finish work. Through coolant capability allows cutting fluid to pass directly through the collet to the tool tip, improving chip evacuation and extending tool life in demanding cutting applications. Machinists and CNC operators install this collet as part of routine tooling setups.

This ER16 collet is suited for light to medium-duty machining operations where compact toolholding and close-tolerance runout are priorities. The ER16 collet system is widely used in high-speed spindles, engraving machines, and compact machining centers. The through coolant feature makes this collet particularly useful in applications involving deep pockets, long-reach tooling, or materials that generate significant heat at the cutting zone.

Key Features

• ER16 collet series for broad compatibility with ER16 toolholders and chucks
• 8.5 mm clamping diameter for precise tool or workpiece grip
• TIR of 0.005 mm for high-accuracy runout control
• Through coolant capable for improved chip flushing and tool cooling
• Lightweight at 0.075 pounds for minimal spindle load impact

Compatibility

Designed as an OEM-style replacement or standard tooling collet for use with ER16-compatible collet chucks and toolholders in CNC and manual machining equipment.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Always power down and lock out the machine spindle before inserting or removing collets. Inspect the collet bore and mating chuck taper for chips, burrs, or damage before seating. Use a properly rated ER collet nut and torque wrench per the toolholder manufacturer's specifications to achieve correct clamping force without over-torquing.