Kennametal 6676976 Square End Mill 0.625in 4 Flute Carbide

Product Description

The KENNAMETAL 6676976 is a solid carbide square end mill designed for high-performance material removal in demanding machining environments. Built to the H1TE series specification, this single-end mill features a 0.625 inch diameter, a 1.25 inch length of cut, and a 3.5 inch overall length. The AlTiN coating improves heat resistance and tool life when cutting ferrous and difficult-to-machine materials. The variable helix angle of 36 to 39 degrees combined with a variable index design reduces chatter and vibration, producing a cleaner cut and extending tool life in production settings. Licensed machinists and CNC operators use this tool for precision milling in steel, stainless steel, cast iron, high-temperature alloys, and hardened materials.

This end mill is suited for use in vertical and horizontal machining centers as well as CNC milling machines where high material removal rates and surface finish quality are required. Primary workpiece material classifications include P, M, K, S, and H, covering steel, stainless steel, cast iron, high-temp alloys, and hardened materials. The centercutting geometry allows plunge milling, making it versatile for slot milling, peripheral milling, and ramp entry operations. The 5/8 inch shank diameter is compatible with standard ER and side-lock toolholders used in most production and job shop environments.

Key Features

• AlTiN coating for improved heat resistance and extended tool life in ferrous and hardened materials
• Variable helix (36 to 39 degrees) and variable index reduce vibration and chatter during cuts
• Centercutting design enables plunge entry and ramp milling operations
• 4-flute spiral geometry for efficient chip evacuation and surface finish quality
• Right-hand cut, right-hand flute configuration for standard CNC spindle compatibility
• Material grade KCPM15 solid carbide substrate for rigidity and wear resistance

Compatibility

The KENNAMETAL 6676976 belongs to the H1TE series and is rated for primary workpiece material codes P, M, K, S, and H, covering steel, stainless steel, cast iron, high-temperature alloys, and hardened materials. Compatible with standard 5/8 inch toolholders including ER collet chucks and end mill holders used in CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist or CNC programmer familiar with toolholder torque specifications and runout requirements. Ensure the machine spindle is fully stopped and de-energized before changing tooling. Verify toolholder bore cleanliness and proper seating depth before tightening to avoid runout that can lead to premature tool breakage. Coolant-through is not supported on this tool, so external coolant or air blast should be directed at the cutting zone during operation.