Kennametal 6676924 Square End Mill 3/8 in 4 Flute Altin

Product Description

The KENNAMETAL 6676924 is a solid carbide square end mill engineered for demanding metal removal in ferrous and exotic alloy materials. With a 3/8 inch mill diameter and 4-flute configuration, this single-end tool delivers aggressive cutting action while maintaining surface finish quality. The AlTiN coating provides elevated heat resistance and wear protection at the cutting edge. The variable helix design, ranging from 36 to 39 degrees, reduces harmonic vibration during cut, enabling higher feed rates and improved tool life. It is used by machinists and tool and die professionals working in job shops, aerospace fabrication, and precision manufacturing environments.

This end mill is suited for milling operations on steel, stainless steel, cast iron, high-temperature alloys, and hardened materials, covering ISO material groups P, M, K, S, and H. The 7/8 inch length of cut and 2-1/2 inch overall length make it appropriate for standard-depth slotting, profiling, and peripheral milling applications. The centercutting geometry permits plunge milling entry without a pilot hole. Right-hand cut and right-hand flute orientation are standard for conventional CNC milling setups.

Key Features

• AlTiN coating for high heat resistance and extended tool life in ferrous and hardened materials
• 360 variable helix angle (36-39 degrees) reduces chatter and vibration for smoother cuts
• Centercutting geometry allows direct plunge entry without pre-drilling
• 4-flute spiral configuration balances chip evacuation and surface finish
• Variable index geometry improves stability during interrupted and full-slot cuts
• KCPM15 material grade optimized for high-performance milling of difficult alloys

Compatibility

Designed for use in standard 3/8 inch collet or end mill holder setups on CNC machining centers and manual mills. Primary workpiece materials include steel, stainless steel, cast iron, high-temperature alloys, and hardened materials, per the H1TE series application guidelines.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the spindle is fully stopped and machine is powered off before changing tooling. Secure the shank in a properly sized collet or end mill holder, torquing to the machine tool manufacturer specifications. Verify runout with an indicator before initiating a cut, particularly for high-speed or hard-material applications.