Accupro 775820 ER32 Collet Chuck CAT40 Taper Shank

Product Description

The ACCUPRO 775820 is an ER32 collet chuck with a CAT40 taper shank, designed for use in CNC machining centers and milling applications. It accepts ER32 collets with a clamping range of 0.078 to 0.787 inches, covering a broad range of tooling diameters in a single chuck body. The chuck features through-spindle coolant delivery, directing coolant to the cutting edge for improved chip evacuation and tool life. Total indicator runout (TIR) is rated at 0.0002 inches, supporting precision work in tight-tolerance applications. Balanced to 30,000 RPM, it is suited for high-speed machining operations. Licensed machinists and CNC setup technicians are the primary installers.

This chuck is intended for use in vertical and horizontal machining centers equipped with CAT40 spindle interfaces. The 0.75 inch projection keeps tooling close to the spindle nose, reducing overhang and improving rigidity during cutting operations. Through-spindle coolant compatibility makes it a practical choice for shops running flood or high-pressure coolant systems. It is well suited for production environments where consistent runout and repeatable tool changes are required.

Key Features

• ER32 collet system with 0.078 to 0.787 inch clamping capacity
• CAT40 taper shank for standard machining center spindle interface
• 0.0002 inch TIR for precision, low-runout tool holding
• Through-spindle coolant delivery for improved chip control and tool life
• Balanced to 30,000 RPM for high-speed machining compatibility
• 0.75 inch projection minimizes tooling overhang and improves rigidity

Compatibility

Designed for use with ER32 collets in CAT40-spindle machining centers. Compatible with any ER32 collet nut and standard ER32 series collets within the stated capacity range.

Installation Notes

Installation requires a CAT40 spindle and an appropriate pull stud torqued to the machine manufacturer's specification. Power down and lock out the machining center before changing tooling. Use a calibrated torque wrench and the correct ER32 collet nut spanner when seating collets. Verify runout at the tool tip with a dial test indicator after installation before resuming cutting operations.