Techniks 04225-02.5 ER25 Collet 2.5mm Through Coolant

Product Description

The TECHNIKS 04225-02.5 is an ER25 series collet designed for precision CNC machining and toolholding applications. Built to hold a 2.5mm tool shank, it delivers a total indicated runout (TIR) of 0.0002 inches (0.005mm), making it suitable for close-tolerance work where tool concentricity directly affects surface finish and tool life. The collet features through coolant capability, allowing cutting fluid to flow directly to the cutting zone. Machining centers, lathes, and CNC routers running ER25-compatible toolholders accept this collet. It weighs 0.5 pounds and is a direct fit in any ER25 collet chuck.

This collet is used in production and job-shop machining environments where ER25 toolholding is standard. Typical applications include drilling, reaming, milling, and tapping with 2.5mm shank tooling. The through coolant design is particularly useful in deep-hole drilling and high-speed finishing operations where heat management at the cutting edge is critical. Machinists and CNC setup technicians working with metric tooling will find this collet a direct fit in existing ER25 chuck systems.

Key Features

• ER25 collet series - fits any standard ER25 collet chuck
• 2.5mm collet size for metric shank tooling
• TIR of 0.0002 inches (0.005mm) for high-precision runout control
• Through coolant port supports directed coolant delivery to the cutting zone
• Lightweight at 0.5 pounds for minimal toolholder imbalance

Compatibility

Designed as an OEM-style replacement or standard fit for ER25 collet chucks used in CNC machining centers, lathes, and routers that accept the ER25 collet series.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the spindle before inserting or removing collets. Seat the collet fully in the chuck nut before threading onto the toolholder body to prevent collet damage. Inspect the collet bore and seating surfaces for chips or debris before each use, as contamination will degrade TIR performance.