Techniks 04225-17 ER25 Collet 17mm Through Coolant

Product Description

The TECHNIKS 04225-17 is an ER25 series collet designed for precision workholding in CNC machining and toolholding applications. Built to accept 17mm diameter tooling, it delivers a Total Indicator Runout (TIR) of 0.0002 inches (0.005 mm), making it well suited for operations where concentricity directly affects finish quality and tool life. The collet features through-coolant capability, allowing cutting fluid to be delivered directly to the cutting zone for improved chip evacuation and thermal management. Machinists and toolroom technicians working on CNC mills, machining centers, and lathes equipped with ER25-compatible chucks will find this collet a reliable production-grade choice.

This collet is intended for use in ER25 collet chucks found on CNC machining centers, milling machines, and turning centers in both residential shop and industrial production environments. The 17mm bore size accommodates standard 17mm round-shank cutting tools. Through-coolant support makes it particularly effective in high-speed or deep-cavity cutting situations where flood coolant alone is insufficient to clear chips or control heat at the cutting edge.

Key Features

• ER25 collet series for compatibility with standard ER25 chucks
• 17mm collet bore size for 17mm round-shank tooling
• TIR of 0.0002 inches (0.005 mm) for high-precision concentricity
• Through-coolant capable for direct coolant delivery to the cutting zone
• Compact and lightweight at 0.5 pounds

Compatibility

Designed as an OEM-style replacement and production collet for use with standard ER25 collet chucks and toolholding systems.

Installation Notes

ER collets are installed by machinists or toolroom technicians using an appropriate ER25 collet nut and chuck wrench torqued per the chuck manufacturer's specifications. Before inserting or removing collets, ensure the machine spindle is fully stopped and the control is in a safe state. Inspect the collet bore, sealing rim, and mating chuck surfaces for chips or damage prior to assembly, as debris will directly affect runout. Do not use damaged or out-of-spec collets, as compromised TIR will affect machined part accuracy and tool life.