Techniks 04211-02.0 ER11 Collet 2 Mm

Product Description

The TECHNIKS 04211-02.0 is an ER11 series collet sized for 2 mm shank tooling, designed for use in CNC machining centers, milling machines, and high-speed spindles that accept ER11 collet chucks. This collet features through-coolant capability, allowing coolant to be directed to the cutting zone for improved chip evacuation and tool life. It holds a Total Indicator Runout (TIR) of 0.0050 mm, providing the concentricity required for precision drilling, reaming, and milling operations. Machinists and CNC operators rely on tight-tolerance collets like this one to maintain part accuracy across production runs.

This collet is suited for light-duty precision machining applications in job shops, production facilities, and toolrooms. The ER11 series is one of the most widely used collet standards in small-spindle CNC work, commonly found in benchtop machining centers, Swiss-style lathes, and engraving machines. The 2 mm bore size is appropriate for small-diameter end mills, drill bits, reamers, and other round-shank cutting tools used in precision component manufacturing.

Key Features

• ER11 collet series for compatibility with standard ER11 collet chucks
• 2 mm bore size for small-diameter round-shank tooling
• Through-coolant design directs coolant to the cutting zone
• TIR of 0.0050 mm for high concentricity and precision runout performance
• Compact ER11 form factor suited for high-speed spindle applications

Compatibility

Designed for use with standard ER11 collet chucks and compatible spindle toolholders accepting the ER11 collet series.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or CNC technician with the spindle fully stopped and the machine in a safe, locked-out state. Use a proper ER collet nut wrench to torque the collet nut - do not use improvised tools that can damage the collet or chuck threads. Inspect the collet bore and seating surfaces for contamination or wear before each use, as debris will directly affect runout. Confirm through-coolant passages are clear and that the collet chuck is rated for through-coolant operation before use.