Techniks 04220-09.5 ER20 Collet 9.5mm

Product Description

The TECHNIKS 04220-09.5 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accept ER20 toolholding systems. Built to a total indicator runout (TIR) of 0.0002 inches (0.0050 mm), this collet delivers the concentricity required for precision cutting, drilling, and reaming operations. It supports through-coolant delivery, directing coolant directly to the cutting zone to improve chip evacuation and extend tool life. Machinists and toolroom technicians working with ER20-compatible toolholders will find this collet suited for production and close-tolerance work.

This collet is sized for 9.5mm shank tooling and fits any ER20-standard collet chuck or toolholder. It is appropriate for both production shop environments and toolroom applications where consistent runout and reliable clamping are required. The through-coolant feature makes it particularly useful in deep-cavity milling, drilling, and high-speed machining setups where flood coolant alone is insufficient to clear chips or cool the cutting edge effectively.

Key Features

• ER20 collet series - compatible with ER20-standard collet chucks and toolholders
• 9.5mm collet bore size for matching shank tooling
• TIR of 0.0002 inches (0.0050 mm) for precision concentricity
• Through-coolant capable - directs coolant to the cutting zone
• Lightweight at 0.5 pounds for easy handling during toolchanges

Compatibility

Designed as an OEM-style replacement or direct-fit collet for ER20-standard collet chucks and toolholding systems used in CNC and manual machining equipment.

Installation Notes

Installation is performed by machining professionals or toolroom technicians. Always power down and lock out the spindle drive before inserting or removing collets. Ensure the collet bore, chuck body, and clamping nut are clean and free of chips or debris before assembly, as contamination directly affects runout. Torque the clamping nut using an appropriate ER collet wrench to the toolholder manufacturer's specification - do not use improvised tools that may damage the nut or collet taper.