Techniks 04220-11/32 ER20 Collet 11/32 Inch

Product Description

The TECHNIKS 04220-11/32 is an ER20 series collet sized at 11/32 inch (0.3438 inch decimal) for use in ER20-compatible collet chucks on CNC machining centers, milling machines, and manual mills. It delivers a Total Indicator Runout (TIR) of 0.0002 inch, providing the concentricity needed for precision drilling, reaming, and light milling operations. The through-coolant design allows cutting fluid to pass directly through the collet, keeping the cutting edge cool and evacuating chips at the tool tip. Machinists and CNC setup technicians install this collet as part of standard toolholding setups in production and job-shop environments.

This collet is suited for use in light to medium-duty machining applications where accurate tool holding and coolant delivery are required. It is a direct fit for any ER20 collet chuck regardless of machine brand, making it a versatile choice for shops running mixed equipment. Typical applications include precision drilling, end milling, and reaming of ferrous and non-ferrous materials where runout control directly affects finished-part quality and tool life.

Key Features

• ER20 collet series - fits any ER20-compatible chuck
• 11/32 inch (0.3438 inch) collet size for standard fractional tooling
• TIR of 0.0002 inch for precise concentricity and repeatable tool positioning
• Through-coolant capable - directs cutting fluid to the tool tip
• Conforms to UNSPSC Code 27112800 for toolholding classification

Compatibility

Designed as a standard ER20 collet replacement or addition for any machine tool equipped with an ER20 collet chuck.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be fully stopped and the chuck de-energized before inserting or removing the collet. Use the appropriate ER20 collet nut and spanner wrench to seat and torque the collet properly - do not use impact tools on the collet nut. Verify runout with a dial indicator after installation before initiating a cutting cycle.