Accupro 775664 ER32 Collet Chuck CAT40 Taper Shank

Product Description

The ACCUPRO 775664 is an ER32 collet chuck designed for precision CNC milling and machining center applications. It accepts ER32 collets with a clamping range of 0.078 to 0.787 inches and mounts via a CAT40 taper shank. Projection measures 6 inches from the gauge line, and total indicator runout (TIR) is rated at 0.0002 inches, making it suitable for finishing operations where concentricity matters. The chuck supports through-spindle and DIN flange coolant delivery, allowing coolant to reach the cutting zone directly. Balanced to 30,000 RPM, it is built for high-speed machining environments where vibration control is critical.

This collet chuck is used in vertical and horizontal machining centers equipped with CAT40 spindle interfaces. It is a common toolholding solution for general milling, drilling, reaming, and light boring in both job shop and production environments. The 6-inch projection is suited for reaching into deep workpiece features or clearing fixtures without requiring a separate extension. Installation and tool changes are handled by CNC machinists and toolroom technicians.

Key Features

• ER32 collet system with a capacity range of 0.078 to 0.787 inches
• CAT40 taper shank for direct mounting in CAT40 spindles
• 0.0002-inch TIR for high-precision, low-runout toolholding
• 6-inch projection for extended reach applications
• Through-spindle and DIN flange coolant support for direct coolant delivery
• Balanced to 30,000 RPM for high-speed machining compatibility

Compatibility

Designed for use in machining centers with a CAT40 spindle interface. Accepts standard ER32 collets.

Installation Notes

Installation is performed by a CNC machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing the chuck. Use the appropriate CAT40 retention knob and drawbar torque procedure specified by the machine tool manufacturer. Verify TIR at the collet nose after assembly using a dial test indicator before running the spindle at speed.