Accupro 775670 ER40 Collet Chuck CAT40 Taper Shank

Product Description

The ACCUPRO 775670 is an ER40 collet chuck with a CAT40 taper shank, designed for CNC machining centers and milling applications where precision tool holding is critical. It accepts ER40 collets with a capacity range of 0.118 to 1.181 inches and delivers a total indicator runout (TIR) of 0.0002 inches, making it suitable for finishing, drilling, and reaming operations that demand tight tolerances. A 4-inch projection provides clearance for deep-reach setups. Through-coolant capability supports both through-spindle and DIN flange coolant delivery, helping to clear chips and manage heat at the cutting edge.

This collet chuck is intended for use in production and job-shop environments running CAT40-spindle machining centers. It is balanced to 30,000 RPM, making it compatible with high-speed spindle applications. Licensed machinists and CNC operators install this chuck as a standard toolholder for end mills, drills, reamers, and taps held in ER40 collets. The 4-inch projection suits setups where fixture height or workpiece geometry requires additional spindle-to-tool distance.

Key Features

• ER40 collet system with 0.118 to 1.181 inch clamping range
• CAT40 taper shank for direct mount to CAT40 spindles
• 0.0002 inch TIR for high-precision tool holding
• 4-inch projection for deep-reach and clearance applications
• Through-coolant compatible via through-spindle and DIN flange delivery
• Balanced to 30,000 RPM for high-speed machining

Compatibility

Designed for use with CAT40-spindle machining centers and compatible with the ER40 collet series. Accepts standard ER40 collets with a collet nut diameter of 2.48 inches.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom personnel. Power down and lock out the machine spindle before installing or removing the toolholder. Use a properly sized CAT40 retention knob and a calibrated torque wrench on the drawbar to ensure secure seating in the spindle taper. Verify TIR with a dial indicator after installation before beginning any cutting operation.