Accupro 775658 ER32 CAT40 Collet Chuck Through Coolant

Product Description

The ACCUPRO 775658 is an ER32 collet chuck with a CAT40 taper shank, designed for precision CNC milling and machining center applications. It accepts ER32 collets across a capacity range of 0.078 to 0.787 inches and delivers a total indicator runout (TIR) of 0.0002 inches, making it suitable for close-tolerance work. The chuck features through-spindle and DIN flange coolant delivery, supporting both flood and directed coolant strategies. With a projection of 3.13 inches and a collet nut diameter of 1.97 inches, it provides clearance and rigidity for a wide range of tooling setups. Balanced to 30,000 RPM, it is appropriate for high-speed machining operations. Installation and setup are typically performed by CNC machinists and toolroom technicians.

This collet chuck is used in CNC machining centers requiring CAT40 spindle tooling. It is well suited for high-speed milling, drilling, reaming, and tapping operations where runout control is critical. The ER32 collet system is widely used in production and job-shop environments for its broad clamping range and availability of collets. Through-coolant capability makes it practical for deep-hole drilling and high-speed finishing passes where chip evacuation and tool cooling are important.

Key Features

• ER32 collet system with 0.078 to 0.787 inches clamping capacity
• CAT40 taper shank for standard CNC machining center spindles
• 0.0002 inches TIR for high-precision toolholding
• Through-spindle and DIN flange coolant delivery
• Balanced to 30,000 RPM for high-speed machining compatibility
• 3.13 inches projection and 1.97 inches collet nut diameter

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers equipped with CAT40 spindle interfaces using the ER32 collet system.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing the chuck. Use a calibrated torque wrench with the appropriate ER32 collet nut spanner to achieve proper collet seating without overtightening. Verify runout with a dial test indicator after setup before committing to a production run.