Accupro 775634 ER11 CAT40 Collet Chuck 6 in Through Coolant

Product Description

The ACCUPRO 775634 is an ER11 collet chuck with a CAT40 taper shank, designed for CNC machining centers where precision tool holding and high-speed performance are required. It accepts ER11 collets with a capacity range of 0.019 to 0.275 inches, making it suitable for small-diameter end mills, drills, and reamers. The chuck features a 6-inch projection and a total indicator runout (TIR) of 0.0002 inches, which supports tight-tolerance work. It is balanced to 30,000 RPM and includes through-coolant capability, allowing coolant to reach the cutting zone directly through the spindle and DIN flange. Licensed machinists and CNC setup technicians are the primary users of this toolholder.

This collet chuck is suited for use on CAT40-spindle vertical and horizontal machining centers in both production and job-shop environments. The ER11 collet series is commonly used when machining small-bore features in aluminum, steel, and other materials where secure clamping and minimal runout are critical. The through-coolant design is especially useful in deep-hole drilling and high-speed finishing operations where heat management and chip evacuation matter. The 6-inch projection accommodates reach requirements in fixture-heavy or deep-cavity setups.

Key Features

• ER11 collet system with 0.019 to 0.275 inch capacity range for small-diameter tooling
• CAT40 taper shank for direct mounting on standard CAT40 machining center spindles
• 0.0002 inch TIR for high-precision, low-runout tool holding
• Balanced to 30,000 RPM for high-speed machining applications
• Through-coolant compatible via through-spindle and DIN flange coolant delivery
• 6-inch projection provides extended reach for deep-cavity and fixtured workpiece setups

Compatibility

Designed for use with CAT40-spindle CNC machining centers that support ER11 collet toolholders. Compatible with through-spindle coolant systems and DIN flange coolant delivery configurations.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machining center spindle before mounting or removing the toolholder. Use a properly rated CAT40 pull stud and torque the collet nut with a calibrated ER collet wrench to manufacturer specifications. Inspect the taper shank and spindle bore for contamination or damage before seating the chuck.