Techniks 04544-04 ER20 Collet 4mm Through Coolant

Product Description

The TECHNIKS 04544-04 is an ER20 series collet designed for precision workholding in CNC machining and toolholding applications. It accepts a 4mm collet size and includes through-coolant capability, allowing coolant to flow directly through the collet to the cutting tool for improved chip evacuation and tool life. The collet holds a total indicator runout (TIR) of 0.005mm, making it suitable for high-precision turning, milling, and grinding operations. This collet is installed by CNC machinists and tool-crib technicians in production and job-shop environments.

This ER20 collet fits standard ER20 collet chucks used in CNC machining centers, lathes, and router spindles. The ER20 series is a widely adopted standard in both light-duty and production-grade machining setups. The through-coolant design makes it appropriate for deep-hole drilling and high-speed milling where heat management at the tool tip is critical. It is sold individually and is compatible with any ER20-specification chuck body.

Key Features

• ER20 collet series for broad chuck compatibility
• 4mm collet bore size for small-diameter tooling
• Through-coolant capable for directed coolant delivery to the cutting edge
• 0.005mm TIR for high-precision runout performance
• Lightweight at 0.5 pounds for easy handling and inventory management

Compatibility

Designed as a direct-fit collet for ER20-specification collet chucks used in CNC milling, drilling, and toolholding applications.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the spindle before seating or removing the collet. Inspect the collet bore and chuck taper for debris or damage before assembly. Follow the machine manufacturer torque guidelines for the collet nut to ensure proper clamping force and runout performance.