Accupro 775001 CAT40 End Mill Holder 1/8 in Through Coolant

Product Description

The ACCUPRO 775001 is a CAT40 taper shank end mill holder designed for CNC machining centers requiring precise tool holding with integrated coolant delivery. The holder accepts a 1/8 inch tool bore and features a 3/4 inch nose diameter with a 2.5 inch projection length. A total indicator runout (TIR) of 0.0002 inch ensures accurate tool positioning at high speeds. The holder is balanced to 30,000 RPM, making it suitable for high-speed cutting operations. Machining professionals and CNC setup technicians install this holder when secure, high-precision end mill clamping with through-coolant capability is required.

This holder is suited for use in CNC vertical and horizontal machining centers equipped with CAT40 spindle interfaces. The 2.5 inch projection provides clearance for a range of end mill lengths in typical milling fixtures and vise setups. The through-spindle and DIN flange coolant delivery supports both flood and directed coolant strategies, reducing heat at the cutting edge and extending tool life in ferrous and non-ferrous applications. The 5/8-11 drawbar thread matches standard CAT40 tooling infrastructure found in most production and job-shop environments.

Key Features

• CAT40 taper shank for compatibility with standard CAT40 spindle interfaces
• 1/8 inch bore diameter for small-diameter end mill applications
• 2.5 inch projection length for adequate reach in typical milling setups
• TIR of 0.0002 inch for high-precision tool positioning
• Balanced to 30,000 RPM for high-speed machining operations
• Through-spindle and DIN flange coolant delivery for effective heat management

Compatibility

Designed as an OEM-style replacement and standard tooling component for CNC machining centers with CAT40 spindle interfaces and a 5/8-11 drawbar thread configuration.

Installation Notes

Installation and removal should be performed by a qualified CNC machinist or toolroom technician with the spindle fully powered down and locked out per facility lockout/tagout procedures. Use a torque wrench rated for standard CAT40 drawbar requirements and follow the machine tool manufacturer guidelines for drawbar engagement. Verify TIR with a dial indicator after seating to confirm proper runout before initiating a cutting cycle. Inspect the taper shank and spindle bore for contamination or damage before every tool change.