Sandvik Coromant 5721444 End Mill Holder CAT40 3/4 in

Product Description

The SANDVIK COROMANT 5721444 is a CAT40 taper shank end mill holder designed for precision milling applications in CNC machining centers. It accepts a 3/4-inch bore and features through-spindle and through-bore coolant delivery, directing coolant directly to the cutting zone. The holder provides 1 inch of projection and a 1-3/4-inch nose diameter, with a clamping depth of 1.75 inches. A TIR of 0.002 inches ensures consistent runout performance for demanding milling operations. Balanced to 8,000 RPM, this holder suits high-speed machining environments where vibration control and tool life are priorities. Installed by machinists and CNC setup technicians in production and job-shop environments.

This end mill holder is suited for vertical and horizontal CNC machining centers equipped with CAT40 spindle interfaces. Typical applications include face milling, slotting, and peripheral milling in ferrous and non-ferrous materials. The through-coolant capability is particularly useful in deep-pocket and high-feed operations where chip evacuation and heat management are critical. The 4.44-inch overall length fits standard CAT40 tooling setups without requiring extended-reach adapters in most configurations.

Key Features

• CAT40 taper shank for compatibility with standard CAT40 spindle interfaces
• 3/4-inch bore diameter accommodates common end mill shank sizes
• Through-spindle and through-bore coolant delivery for direct cutting-zone cooling
• 1 inch projection with 1-3/4-inch nose diameter for rigid tool engagement
• TIR of 0.002 inches for consistent runout control
• Balanced to 8,000 RPM for high-speed machining applications

Compatibility

Designed for use with CAT40 spindle-equipped CNC machining centers that support through-spindle coolant. Compatible with 3/4-inch shank end mills and cutting tools requiring a CAT40 taper interface.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician following the machine tool manufacturer's tooling procedures. Power down and lock out the machine spindle before mounting or removing the holder. Use the appropriate spanner wrench and pull stud torque specifications defined by the machine tool builder. Inspect the taper bore and spindle taper for contamination or damage before seating the holder.