Kennametal 1013381 CAT50 End Mill Holder 5/16 Inch Through Coolant

Product Description

The KENNAMETAL 1013381 is a CAT50 taper shank end mill holder designed for milling operations on CNC machining centers. It accepts a 5/16-inch tool bore and delivers a 2.5-inch projection from the gauge line to the tool tip. The nose diameter measures 1 inch, and the holder features through-spindle coolant delivery to direct cutting fluid directly to the tool tip. With an overall length of 6.5 inches and a clamping depth of 4.69 inches, this holder provides rigid tool engagement suitable for demanding milling applications. It is balanced to 12,000 RPM, making it appropriate for higher-speed finishing and semi-finishing operations. The drawbar thread size is 1-8. Licensed machinists and CNC setup technicians install this holder.

This end mill holder is used in vertical and horizontal CNC machining centers equipped with CAT50 spindle interfaces. It suits both production and job-shop environments where consistent tool runout and reliable coolant delivery are required. The through-coolant design is especially effective in deep-cavity milling, slotting, and finishing passes where flood coolant cannot adequately reach the cutting edge. It is appropriate for steel, cast iron, aluminum, and other common workpiece materials where tool life and surface finish consistency are priorities.

Key Features

• CAT50 taper shank for direct spindle mounting on CAT50-equipped machining centers
• 5/16-inch tool bore with 4.69-inch clamping depth for secure tool retention
• Through-spindle coolant delivery channels fluid to the cutting zone
• Balanced to 12,000 RPM for higher-speed milling applications
• 2.5-inch projection suitable for moderate reach requirements
• 1-8 drawbar thread size for standard CAT50 retention knob compatibility

Compatibility

Designed for use with CAT50 spindle-equipped CNC machining centers and compatible with 5/16-inch shank end mills requiring through-coolant capability.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before inserting or removing the holder. Use the correct CAT50 retention knob and torque the drawbar to the machining center manufacturer's specification. Verify tool runout with a dial indicator after clamping before beginning any cut.