Techniks 04544-08 ER20 Collet 8.00 Mm

Product Description

The TECHNIKS 04544-08 is an ER20 series collet designed for use in CNC machining centers, milling machines, and other rotating spindle equipment that accepts the ER20 collet system. It features an 8.00 mm collet bore size and supports through-coolant delivery, allowing cutting fluid to pass directly through the toolholder assembly to the cutting edge. Total indicator runout (TIR) is rated at 0.0050 mm, making it suitable for applications where tool concentricity directly affects surface finish and tool life. Overall length is 1.2400 inches with an overall diameter of 0.8300 inches. Machinists and CNC technicians are the primary installers.

This ER20 collet is suited for light to medium-duty machining operations in both production shop and job shop environments. The ER20 collet series is a widely adopted standard in CNC milling, drilling, and tapping applications. Through-coolant capability makes this collet appropriate for deep-hole drilling and high-speed cutting operations where directed coolant flow reduces heat buildup and chip evacuation issues. It is packaged and sold individually.

Key Features

• ER20 collet series - widely compatible with ER20 toolholders and spindle systems
• 8.00 mm bore size for direct workholding of 8.00 mm shank tooling
• Through-coolant capable for directed fluid delivery to the cutting zone
• TIR of 0.0050 mm for consistent tool concentricity and extended tool life
• Overall length of 1.2400 inches and overall diameter of 0.8300 inches

Compatibility

Designed as an OEM-style replacement or direct-fit collet for ER20 toolholder systems accepting an 8.00 mm collet size.

Installation Notes

Installation is performed by machinists or CNC technicians following standard toolholder lockout and spindle-stop procedures before seating or removing collets. The collet should be inspected for debris or damage before installation and seated fully into the ER20 nut before tightening. Use a proper ER collet nut wrench and matching torque specifications provided by the toolholder manufacturer - do not use improvised tools that can distort the collet taper. Verify runout with a dial indicator after clamping before returning the spindle to operation.