Techniks 04208-1/8 ER8 Collet 1/8 Inch

Product Description

The TECHNIKS 04208-1/8 is an ER8 series collet sized for 1/8 inch (0.1250 inch decimal) tool shanks. It is designed for use in ER8-compatible collet chucks mounted in CNC machining centers, milling machines, and similar rotating spindle equipment. The collet grips cutting tools or workpiece shanks with a Total Indicator Runout (TIR) of 0.0002 inch, supporting precision work where concentricity matters. A through-coolant passage allows coolant delivery directly to the cutting zone. Machinists and tooling technicians install and service this collet as part of routine tool changes and chuck maintenance.

The 04208-1/8 fits standard ER8 collet chucks used in light-duty CNC milling and drilling applications. Its 1/8 inch capacity makes it suited for small-diameter end mills, drill blanks, and similar tooling common in precision machining, engraving, and fine-detail work. The through-coolant feature supports flood and directed coolant strategies without requiring a separate coolant-fed chuck adapter.

Key Features

• ER8 collet series for use in ER8-compatible collet chucks
• 1/8 inch (0.1250 inch) collet size for small-diameter tool shanks
• TIR of 0.0002 inch for high-concentricity tool holding
• Through-coolant design delivers coolant directly to the cutting zone
• Lightweight at 0.5 pounds for easy handling during tool changes

Compatibility

Designed as a direct-fit replacement or spare for ER8-series collet chucks accepting 1/8 inch collets.

Installation Notes

Installation and removal should be performed by a qualified machinist or tooling technician. Always power down and lock out the spindle before changing collets. Use a proper ER8 collet nut and torque wrench rated for collet chuck service - do not over-tighten by hand or with improvised tools. Inspect the collet bore and chuck taper for chips or wear before seating the collet.