Techniks 04225-09 ER25 Collet 9 Mm Through Coolant

Product Description

The TECHNIKS 04225-09 is an ER25 series collet designed for precision workholding in CNC machining centers, milling machines, and high-speed spindle applications. Built to a 9 mm collet size, it delivers a Total Indicator Runout (TIR) of 0.0002 inches (0.0050 mm), making it a reliable choice for close-tolerance work where concentricity matters. The through-coolant feature allows cutting fluid to pass directly through the collet body to the tool tip, improving chip evacuation and extending tool life in deep-pocket and high-feed operations. Machinists, tool-and-die technicians, and CNC setup personnel are the primary installers of this type of collet.

This ER25 collet fits standard ER25 collet chucks used in a wide range of machining environments, from production shops running production-volume milling to toolroom operations requiring repeatable setups. The 9 mm bore accommodates shanks at or below that diameter, and the through-coolant passage suits wet-cutting applications where flood or high-pressure coolant delivery to the cutting zone is required. It is equally at home in vertical machining centers and horizontal spindle configurations that accept ER25 toolholding systems.

Key Features

• ER25 collet series for broad compatibility with ER25 chucks and toolholders
• 9 mm collet size accommodates tool shanks up to 9 mm in diameter
• TIR of 0.0002 inches (0.0050 mm) supports close-tolerance and finish-cutting operations
• Through-coolant design channels cutting fluid directly to the tool tip
• Compact form factor suited for high-speed spindle use

Compatibility

Designed as an OEM-style replacement or direct-fit collet for ER25 collet chucks and ER25 toolholding systems in CNC milling, drilling, and machining center applications.

Installation Notes

ER collets are installed and removed by trained machinists or CNC setup technicians. Always de-energize and lock out the spindle drive before changing collets. Inspect the collet bore and chuck taper for chips or debris before seating the collet, as contamination directly degrades TIR. Follow the toolholder manufacturer torque guidance for the collet nut - never overtighten, as this can collapse the collet bore and damage both the collet and the tool shank.