Techniks 04225-04 ER25 Collet 4mm Through Coolant

Product Description

The TECHNIKS 04225-04 is an ER25 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept ER25 collet chucks. This collet holds a 4mm shank tool and features through-coolant capability, allowing coolant to flow directly to the cutting zone for improved chip evacuation and tool life. It maintains a total indicator runout (TIR) of 0.005mm, delivering the precision required for close-tolerance machining operations. Licensed machinists and CNC setup technicians are the primary installers of this collet type.

The 04225-04 is suited for production and job-shop environments running small-diameter end mills, drills, reamers, or other 4mm shank tooling. Through-coolant compatibility makes it a practical choice for deep-hole drilling and high-speed milling applications where heat and chip buildup at the cutting edge must be managed. It fits any spindle or toolholder configured for the ER25 collet standard.

Key Features

• ER25 collet series for broad compatibility with ER25 chucks and toolholders
• 4mm collet bore for precise 4mm shank tool retention
• Through-coolant design directs coolant flow to the cutting zone
• TIR of 0.005mm supports tight-tolerance machining

Compatibility

Designed for use with ER25 collet chucks and toolholders that accept the ER25 collet standard.

Installation Notes

Installation is performed by machinists or CNC technicians. Ensure the spindle is fully stopped and the machine is in an e-stop or locked-out state before changing collets. Seat the collet fully into the nut before inserting the toolholder, and tighten to the toolholder manufacturer torque specification using the appropriate ER spanner wrench. Inspect the collet bore and seating taper for contamination or wear before each use.