Kennametal 3899136 Corner Radius End Mill 5 Flute Solid Carbide

Product Description

The KENNAMETAL 3899136 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining applications. It measures 0.3438 inches in diameter with a 1-inch length of cut and a 2.5-inch overall length. The 3/8-inch straight cylindrical shank seats securely in standard toolholders. Five flutes with a high-helix spiral geometry and an AlTiN PVD coating allow this tool to handle both roughing and finishing passes. Submicron carbide grade provides edge stability under high heat and cutting pressure. Intended for use by machinists and CNC operators working in job shop or production environments.

The 3899136 is suited for milling steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The AlTiN coating improves thermal resistance and tool life when cutting these abrasive or high-temperature workpiece materials. The corner radius end type reduces stress concentration at cutting corners and produces a blended radius profile rather than a sharp 90-degree edge. It is rated for use with HC-HSK Form A tooling. This tool is appropriate for vertical and horizontal machining centers running right-hand spindle rotation. The single-end design means the tool is replaced rather than reindexed when the cutting end is worn.

Key Features

• Solid submicron carbide construction for rigidity and edge retention in hard and abrasive materials
• AlTiN PVD coating for elevated thermal resistance and extended tool life
• 5-flute, high-helix spiral geometry supports both roughing and finishing passes
• Corner radius end type reduces notching and stress at cutting corners
• Right-hand flute direction and cutting direction for standard spindle operation
• Straight cylindrical shank compatible with standard collet and milling chucks

Compatibility

Rated for use with HC-HSK Form A toolholders. Suitable for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials (material codes P, M, K, S, H). Part of the KENNAMETAL UCDE series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the tool path program is verified before mounting. Seat the shank fully into the collet or toolholder to the recommended gauge length and confirm runout before beginning a cut. Do not use this tool in a left-hand spindle configuration.