Walter-prototyp 8417679 Corner Radius End Mill 1/2 in 5 Flute

Product Description

The WALTER-PROTOTYP 8417679 is a solid carbide corner radius end mill engineered for demanding material removal in superalloys, titanium, stainless steel, and general steel applications. It features a 1/2 inch diameter with a 0.0150 inch corner radius, a 1-1/4 inch length of cut, and a 3 inch overall length. The 5-flute, right-hand geometry is finished with a nACo (WJ30EM) coating that extends tool life under high-heat cutting conditions. It is a single-end, centercutting design suited for milling, slotting, and contouring operations. Licensed machinists and tool-and-die professionals are the primary installers and operators of this tool.

This end mill is designed for use in CNC machining centers and manual milling machines where high-performance cutting in difficult-to-machine materials is required. Its extended reach configuration, with a 1.5039 inch reach length, makes it well suited for deep-pocket milling and profiling operations in aerospace, medical, and energy-sector component work. The MA377.A-5-R series positions it as a roughing and finishing capable tool, reducing the need for multiple tool changes in a single operation.

Key Features

• Solid carbide construction for rigidity and thermal resistance in superalloy and titanium cutting
• nACo coating (WJ30EM proprietary designation) provides oxidation resistance at elevated cutting temperatures
• 5-flute geometry balances chip evacuation with surface finish quality
• 0.0150 inch corner radius reduces stress concentration at the cutting edge and extends tool life
• 38 degree helix angle promotes smooth cutting action and reduced cutting forces
• Centercutting design allows plunge milling entry without a pre-drilled pilot hole
• Extended reach with 1.5039 inch reach length supports deep-pocket and hard-to-access feature machining

Compatibility

Compatible with CNC machining centers and milling machines accepting a 1/2 inch straight-cylindrical shank with h6 tolerance. Designed for primary use in superalloys and titanium (material code S) and secondary use in stainless steel and steel (material codes M and P) per the MA377.A-5-R series specification.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with CNC tooling setup and cutting parameters for carbide end mills. Secure the shank fully in a collet or end mill holder rated for the shank diameter before running the spindle. Verify spindle speed, feed rate, and depth of cut against the material being machined before beginning a cut. Do not exceed the tool's rated cutting envelope, and inspect the corner radius edge for chipping before each use.