Kennametal 6676457 Corner Radius End Mill 3/4 in 4 Flute Altin

Product Description

The KENNAMETAL 6676457 is a solid carbide corner radius end mill engineered for high-performance milling in demanding material applications. It features a 3/4 inch diameter, a 0.0600 inch corner radius, and four right-hand spiral flutes with a 36-degree helix angle. The cutting zone spans 1-1/2 inches, and overall length is 4 inches. An AlTiN PVD coating provides thermal resistance and wear protection at elevated cutting temperatures. The submicron carbide grade supports consistent performance in both roughing and finishing passes. This tool is designed for use by machinists and tooling professionals in CNC machining centers and milling applications where edge integrity and surface finish are critical.

The 6676457 is suited for milling steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It is a single-end, centercutting tool, allowing plunge entry in addition to peripheral and slot milling. The straight cylindrical shank with a 3/4 inch diameter provides rigid clamping in hydraulic chucks, shrink-fit holders, and collet-style toolholders. It is appropriate for both conventional and high-efficiency milling strategies on horizontal and vertical machining centers used in job shops, aerospace, and general metalworking environments. The short flute length designation makes it well-suited for applications requiring rigidity and reduced deflection.

Key Features

• Solid carbide submicron grade construction for extended tool life in hard and abrasive materials
• AlTiN PVD coating for high-temperature wear resistance during dry or minimal-lubrication cuts
• 0.0600 inch corner radius reduces stress concentration and improves edge durability at workpiece corners
• 36-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Centercutting geometry allows direct plunge milling without a pre-drilled pilot hole
• Compatible with hydraulic chuck toolholders including HC-HSK Form A and HC-CV Form AD styles

Compatibility

Designed for use with HC-HSK Form A, Hydraulic Chuck Standard Line Inch KM63XMZ, and HC-CV Form AD toolholding systems. Suitable for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials per material codes P, M, K, S, and H.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the toolholder is clean and free of debris before seating the shank. Verify runout with a dial indicator after clamping to confirm concentricity. Follow the toolholder manufacturer torque and clamping specifications for the chuck style in use.