Kennametal 3640199 CAT50 Shell Mill Holder 1.75in Nose

Product Description

The KENNAMETAL 3640199 is a CAT50 taper shank shell mill holder designed for use on CNC machining centers equipped with CAT50 spindles. It accepts shell mills and face mills via a 1.75-inch nose diameter interface and delivers coolant through two paths: through-spindle and DIN flange. Overall length is 10.188 inches with a projection from flange to nose end of 5.500 inches. The 3/4-inch pilot diameter and 3/8-24 lock screw thread ensure secure cutter retention. Balanced to 12,000 RPM, this holder suits high-speed finishing and semi-finishing operations in production environments. Installation is typically performed by a CNC setup technician or machinist.

This shell mill holder is suited for horizontal and vertical machining centers running CAT50 tooling. It is used in production shops, tool rooms, and job shops where face milling, shoulder milling, or large-diameter insert-style shell mill operations are performed. The through-spindle and DIN flange coolant delivery supports flood and directed coolant strategies, making it applicable to operations on steel, cast iron, and aluminum workpieces where chip evacuation and tool life are priorities.

Key Features

• CAT50 taper shank for direct mount to standard CAT50 spindles
• 1.75-inch nose diameter accommodates common shell mill bore sizes
• Dual coolant delivery via through-spindle and DIN flange ports
• Balanced to 12,000 RPM for stable high-speed operation
• 3/8-24 lock screw thread for positive cutter retention
• 3/4-inch pilot diameter for accurate shell mill registration

Compatibility

Designed for use with CAT50 spindle machines accepting standard shell mill holders with a 1.75-inch nose diameter and 3/4-inch pilot diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before mounting or removing the holder. Use a calibrated torque wrench on the lock screw to the machine or tooling manufacturer specification — do not overtighten. Verify runout at the nose with a dial indicator before putting the holder into production use.