Kennametal 1026380 End Mill Holder CAT40 1/2 Inch

Product Description

The KENNAMETAL 1026380 is a CAT40 taper shank end mill holder designed for use in CNC machining centers. It accepts a 1/2 inch bore and delivers a 1.75 inch projection from the spindle face, making it well suited for standard-reach milling operations. The holder features through-coolant capability, routing cutting fluid directly to the tool tip for improved chip evacuation and extended tool life. A 5/8-11 drawbar thread secures the holder in the spindle, and the unit is balanced to 12,000 RPM for stable high-speed operation. Machinists and tool crib technicians working in production or job shop environments install this holder as part of a modular CAT40 tooling system.

This end mill holder is intended for use on CNC vertical and horizontal machining centers equipped with a CAT40 spindle taper. The through-coolant design is particularly valuable in deep-pocket milling, slotting, and operations where flood coolant does not reach the cutting zone effectively. The 1-3/4 inch nose diameter and 3.26 inch clamping depth provide solid tool engagement for end mills with 1/2 inch shanks. This holder suits both roughing and finishing applications where concentricity and rigidity are required.

Key Features

• CAT40 taper shank for compatibility with standard CAT40 spindle interfaces
• 1/2 inch bore accepts standard 1/2 inch shank end mills
• Through-coolant design routes fluid directly to the cutting edge
• Balanced to 12,000 RPM for stable high-speed machining
• 5/8-11 drawbar thread for secure spindle retention
• 1.75 inch projection suitable for standard-reach milling setups

Compatibility

Designed as an OEM-style toolholder for CNC machining centers equipped with a CAT40 taper spindle interface accepting 1/2 inch shank cutting tools.

Installation Notes

Installation is performed by a machinist or tooling technician with the spindle in the tool-change position and the machine powered down or placed in a safe state per facility lockout/tagout procedures. Clean the taper bore and spindle taper contact surfaces before seating the holder to ensure proper seating and runout performance. Torque the drawbar according to the machining center manufacturer specifications. Verify through-coolant passages are clear before use to prevent blockage at the tool tip.