Techniks 04225-03 ER25 Collet 3mm Through Coolant

Product Description

The TECHNIKS 04225-03 is an ER25 series collet designed for precision workholding in CNC machining centers, milling machines, and similar rotating spindle applications. With a 3.00 mm bore size and a total indicated runout (TIR) of 0.0002 inches (0.0050 mm), this collet holds close tolerances suited to finish milling, drilling, and reaming operations. Through-coolant capability allows cutting fluid to flow directly through the collet body and to the cutting edge, supporting chip evacuation and tool life in high-production environments. Machinists and CNC setup technicians are the primary installers.

The 04225-03 is sized for ER25 collet chucks and is well suited to light-duty to medium-duty cutting operations requiring consistent, repeatable tool runout. Applications include production milling, high-speed drilling, and precision boring where maintaining tight dimensional tolerances is critical. The through-coolant feature makes this collet particularly useful in deep-hole drilling and long-reach tooling setups where flood coolant alone cannot reach the cutting zone effectively.

Key Features

• ER25 collet series for broad compatibility with ER25 chuck holders
• 3.00 mm bore accommodates small-diameter cutting tools and drill blanks
• TIR of 0.0002 inches (0.0050 mm) for high-precision, low-runout toolholding
• Through-coolant design channels cutting fluid directly to the tool tip

Compatibility

Designed as an OEM-style replacement or direct-fit collet for ER25 series collet chucks and toolholding systems.

Installation Notes

Installation is performed by machinists or CNC technicians. Ensure the spindle and chuck are fully stopped and locked out before inserting or removing the collet. Clean the collet body and chuck bore thoroughly before seating to prevent runout caused by chips or debris. Torque the collet nut using the appropriate ER25 collet wrench to achieve proper clamping force without over-stressing the collet body.