Accupro 775000 End Mill Holder CAT40 1/8 Inch Through Coolant

Product Description

The ACCUPRO 775000 is a CAT40 taper shank end mill holder designed for precision milling operations on CNC machining centers. It accepts a 1/8 inch bore and features a 5/8 inch nose diameter with a 1.35 inch projection from gauge line to tool tip. Through-coolant capability is supported via both through-spindle and DIN flange coolant delivery, directing fluid directly to the cutting zone for improved chip evacuation and tool life. The holder achieves a TIR of 0.0002 inch, making it suitable for tight-tolerance work where runout directly affects surface finish and tool wear. The drawbar thread is 5/8-11, standard for CAT40 tooling.

This holder is used in horizontal and vertical CNC machining centers equipped with CAT40 spindles. It is suited for production environments running small-diameter end mills in ferrous and non-ferrous materials where through-coolant delivery is required. The 1/8 inch bore accommodates smaller shank tooling commonly used in detail milling, slot milling, and contouring operations. The holder is balanced to 30,000 RPM, supporting high-speed machining applications where spindle balance directly affects surface quality and spindle bearing life.

Key Features

• CAT40 taper shank for direct mount in CAT40 CNC spindles
• 1/8 inch bore diameter for small shank end mills
• Through-coolant compatible via through-spindle and DIN flange delivery
• TIR of 0.0002 inch for high-precision, low-runout tool holding
• Balanced to 30,000 RPM for high-speed machining applications
• 5/8-11 drawbar thread, standard CAT40 interface

Compatibility

Designed for use in CNC machining centers with CAT40 taper spindles. Compatible with 1/8 inch shank end mills and tooling requiring through-spindle or DIN flange coolant delivery.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or CNC setup technician with the spindle fully stopped and the machine in a locked-out state per applicable lockout/tagout procedures. Use a proper CAT40 toolholder tightening fixture and torque wrench rated for the drawbar thread when securing the holder in the spindle. Inspect the taper bore and spindle taper for chips, nicks, or contamination before seating the holder, as debris will directly affect runout. Verify coolant port alignment with the spindle coolant supply before enabling through-coolant flow.