Sandvik Coromant 5727999 Er Collet Chuck C4 ER20

Product Description

The SANDVIK COROMANT 5727999 is an ER collet chuck with a modular connection shank designed for precision CNC machining applications. Built around the ER20 collet series, it accepts standard ER20 collets and mounts via a C4 modular connection interface. The chuck projects 1.378 inches from the gauge face and reaches an overall length of 2.3228 inches. Balanced to 39,000 RPM, it is suited for high-speed spindle work where runout and vibration control are critical. Through-coolant capability delivers cutting fluid directly to the tool tip, extending tool life and improving chip evacuation. A wrench-actuated nut locks the collet. Licensed machinists and CNC setup technicians are the primary installers.

This ER collet chuck is used in machining centers equipped with a C4 modular tooling interface. Typical applications include milling, drilling, reaming, and tapping operations where the ER20 collet range covers the required tool shank diameter. The through-coolant feature makes it well suited for deep-hole drilling and high-speed finishing passes where flood coolant is insufficient. It fits both horizontal and vertical machining center spindles configured for C4 modular connection tooling.

Key Features

• ER20 collet series compatibility for a wide range of tool shank diameters
• C4 modular connection shank for fast, repeatable tooling changes
• Balanced to 39,000 RPM for high-speed machining stability
• Through-coolant design directs fluid to the cutting zone
• Wrench actuator for secure collet clamping
• Nose diameter of 1.3268 inches provides clearance in tight setups

Compatibility

Designed for use with machining centers equipped with a C4 modular connection interface and standard ER20 collets. Confirm spindle interface and collet series before installation.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician familiar with modular tooling systems. Power down and lock out the machine spindle before mounting or removing any toolholder. Ensure the C4 coupling and mating surfaces are clean and free of chips or burrs before assembly. Torque the collet nut using a proper ER wrench and torque wrench in accordance with the toolholder manufacturer specifications.