Kennametal 3899134 Corner Radius End Mill 0.2188in 5 Flute

Product Description

The KENNAMETAL 3899134 is a solid carbide corner radius end mill designed for high-performance milling in demanding materials including steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It carries a 0.2188 inch cutting diameter, a 0.625 inch length of cut, and a 2.5 inch overall length with a 0.25 inch straight-cylindrical shank. The five-flute geometry with a high helix angle and AlTiN PVD coating supports both roughing and finishing operations in a single tool, making it a practical choice for machinists and tool-and-die professionals who need consistent performance across a broad material range.

This end mill fits typical CNC machining center applications where tight tolerances and surface finish are required in one setup. The UCDE series designation places it within KENNAMETAL's submicron carbide grade lineup, suited for shops running steel, stainless, cast iron, superalloys, and hard materials at elevated speeds. It is compatible for use with HC 20M through HC 32M hydraulic sleeves metric with inch bores and HC-CV Form AD toolholding systems as specified by the manufacturer.

Key Features

• Solid carbide construction with submicron material grade for wear resistance in hard and abrasive workpiece materials
• AlTiN PVD coating provides thermal and oxidation resistance, extending tool life in dry or semi-dry cutting
• Five-flute design supports both roughing and finishing in a single tool pass
• High helix angle promotes efficient chip evacuation and reduced cutting forces
• Right-hand cut, right-hand flute spiral with straight-cylindrical shank for broad toolholder compatibility
• Corner radius end type reduces stress concentration at the cutting edge compared to sharp-corner geometry

Compatibility

Designed for use with HC 20M through HC 32M hydraulic sleeves metric with inch bores and HC-CV Form AD toolholding systems. Suitable for milling steel, stainless steel, cast iron, superalloys, titanium, and hard materials per ISO material codes P, M, K, S, and H.

Installation Notes

Installation should be performed by a qualified machinist familiar with CNC tooling setup and ISO toolholding standards. Ensure the machine spindle is fully stopped and the tool changer is disabled before loading or removing the end mill. Verify shank seating depth and clamping force against the toolholder manufacturer specifications before initiating a cut. Do not use this end mill as a center-cutting tool, as it is not rated for plunge entry.