Accupro 775742 ER16 Collet Chuck BT40 Taper Through Coolant

Product Description

The ACCUPRO 775742 is an ER16 collet chuck designed for precision CNC machining applications. It accepts ER16-series collets with a clamping range of 0.02 to 0.393 inches, making it suitable for a wide range of small-diameter tooling. The chuck features a BT40 taper shank and a 5-inch projection from the gauge line. Total indicator runout (TIR) is rated at 0.0002 inches, supporting tight-tolerance milling and drilling operations. Through-coolant capability, compatible with both through-spindle and DIN flange coolant delivery, allows directed coolant flow to the cutting edge. The unit weighs 1 pound and is balanced to 30,000 RPM.

This collet chuck is intended for use in BT40-spindle CNC machining centers performing milling, drilling, reaming, and tapping operations. The 5-inch projection suits applications requiring extended reach into deep pockets or past fixture obstructions. Through-coolant functionality makes it well-suited for high-speed cutting of ferrous and non-ferrous materials where chip evacuation and tool-tip cooling are critical. It is typically installed by CNC machinists and tooling setup technicians in job shop and production machining environments.

Key Features

• ER16 collet system with 0.02 to 0.393 inches clamping capacity
• BT40 taper shank for direct spindle mounting on compatible machining centers
• 0.0002 inches TIR for high-precision, tight-tolerance toolholding
• 5-inch projection for extended reach applications
• Through-coolant compatible with through-spindle and DIN flange coolant systems
• Balanced to 30,000 RPM for high-speed machining operations

Compatibility

Designed for use with BT40-spindle CNC machining centers and accepts standard ER16-series collets. Coolant delivery is compatible with through-spindle and DIN flange configurations.

Installation Notes

Installation should be performed by a qualified CNC machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before mounting or removing the chuck. Verify that the BT40 taper and retention knob are clean and free of chips or debris before seating the toolholder. Torque the collet nut using an appropriate ER16 spanner and torque wrench per the collet nut manufacturer's specification, and confirm TIR with a dial indicator after setup.