Techniks 04220-15/32 ER20 Collet 15/32 Inch

Product Description

The TECHNIKS 04220-15/32 is an ER20 series collet sized at 15/32 inch (0.4688 decimal inch) for use in ER20-compatible collet chucks on CNC machining centers, manual mills, and drill presses. It delivers a Total Indicator Runout (TIR) of 0.0002 inch, providing the close concentricity control required for precision drilling, reaming, and light milling operations. Through-coolant capability allows cutting fluid to be directed to the tool tip, supporting extended tool life and improved chip evacuation in deep-hole and high-speed applications. Machinists and CNC setup technicians are the primary installers of this component.

This collet is suited for machine shop environments running production or jobbing work that demands consistent tool holding in the ER20 collet size range. The 15/32 inch bore accommodates round-shank cutting tools and drill bits at that diameter. Through-coolant support makes it a practical choice for operations where flood coolant alone is insufficient, such as deep drilling cycles or high-feed finishing passes. It fits any ER20 collet chuck that supports through-coolant delivery.

Key Features

• ER20 collet series - fits standard ER20 collet chucks
• 15/32 inch (0.4688 inch) bore size for direct shank tool holding
• TIR of 0.0002 inch for precision concentricity control
• Through-coolant design channels fluid directly to the cutting edge
• Compatible with CNC and manual machine spindle applications

Compatibility

Designed as an OEM-style replacement or direct-fit collet for ER20 collet chucks that support through-coolant tool holding.

Installation Notes

Installation is performed by a machinist or CNC technician. Ensure the spindle is fully stopped and the machine is powered down or in an E-stop state before changing collets. Clean the collet chuck bore and the collet taper surfaces before seating to prevent runout caused by chips or debris. Do not exceed the torque rating of the collet nut specified by the chuck manufacturer.