Techniks 04211-04.0 ER11 Collet 4.00mm

Product Description

The TECHNIKS 04211-04.0 is an ER11 series collet designed for use in CNC machining centers, milling machines, and high-speed spindle applications. It accepts a 4.00mm tool shank and features through-coolant capability, allowing coolant to be delivered directly to the cutting zone for improved chip evacuation and tool life. The collet holds a total indicator runout (TIR) of 0.0050mm, providing the precision required for close-tolerance machining work. It is installed and serviced by machinists and CNC setup technicians in production and job-shop environments.

This collet is suited for light-duty to medium-duty cutting applications where a compact ER11 collet chuck is already in use. The small collet series is commonly found on high-speed spindles, engravers, PCB drilling machines, and compact machining centers. The 4.00mm bore size makes it appropriate for small-diameter end mills, drills, and reamers used in precision work. Through-coolant support makes it a practical choice for operations where flood or pressure coolant is routed through the tool holder.

Key Features

• ER11 collet series for use with compatible ER11 collet chucks and tool holders
• 4.00mm collet bore size for small-diameter tooling
• Through-coolant capable for direct coolant delivery to the cutting edge
• TIR of 0.0050mm for high-precision runout control
• Lightweight at 0.08 pounds, suitable for high-speed spindle applications

Compatibility

Designed for use with ER11-compatible collet chucks and tool holders accepting standard ER11 collets. Verify chuck clamping range and through-coolant port alignment before installation.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and de-energize the spindle before inserting or removing the collet. Seat the collet fully into the nut before threading onto the chuck body, and torque the collet nut using an appropriate ER spanner wrench to the tool holder manufacturer specification. Inspect the collet bore and seating surfaces for chips or debris prior to installation to maintain rated TIR performance.