Techniks 04220-11 ER20 Collet 11mm Through Coolant

Product Description

The TECHNIKS 04220-11 is an ER20 series collet designed for precision workholding in CNC machining and toolholding applications. It accepts a collet size of 11mm and delivers a total indicator runout (TIR) of 0.0002 inches (0.0050mm), making it suitable for close-tolerance work where concentricity matters. The collet features through coolant capability, allowing coolant to be directed to the cutting zone for improved chip evacuation and tool life. Machinists, toolroom technicians, and CNC setup personnel are the primary installers and users of this component.

This ER20 collet is used in milling, drilling, reaming, and tapping operations on CNC machining centers, manual mills, and toolholding systems that accept the ER20 collet standard. Through coolant support makes it well suited for deep-hole drilling and high-speed cutting where direct coolant delivery is required. It is appropriate for both production shop and toolroom environments handling a range of cutting tool shanks up to 11mm in diameter.

Key Features

• ER20 collet series for wide compatibility with ER20-standard toolholders
• 11mm collet size accommodates cutting tool shanks up to 11mm in diameter
• TIR of 0.0002 inches (0.0050mm) for precise, concentric tool holding
• Through coolant design channels coolant directly to the cutting edge
• Compact form factor suitable for high-speed spindle applications

Compatibility

Designed as an OEM-style replacement or direct-fit collet for toolholders built to the ER20 collet standard.

Installation Notes

ER20 collets are installed and removed by qualified machinists or CNC toolroom technicians using the appropriate ER20 collet nut and spanner wrench. Ensure the spindle or toolholder is fully de-energized and the machine is in a safe, locked-out state before changing collets. Clean the collet bore and toolholder taper thoroughly before seating the collet to maintain the rated TIR. Do not exceed the maximum clamping range for the collet size when selecting cutting tool shanks.