Osg 404-3438-BN11 Ball End Mill 0.3438 in 4 Flute Tialn

Product Description

The OSG 404-3438-BN11 is a solid carbide ball end mill from the OSG 404BN series, designed for precision milling in a wide range of metalworking applications. The tool measures 0.3438 inches in diameter with a 0.875-inch length of cut and a 2.5-inch overall length. The 4-flute, single-end design supports both roughing and finishing operations. A TiAlN PVD coating provides heat resistance and extended tool life when cutting ferrous and difficult materials. The right-hand cutting and flute direction, combined with a 30-degree medium helix angle, promotes chip evacuation and surface finish quality. Shank diameter is 0.3750 inches, straight-cylindrical type.

This end mill is suited for machining steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. It is a standard-length tool without extended reach or coolant-through capability, making it appropriate for conventional milling center setups where rigidity and repeatability are priorities. The 404BN series is positioned as an economical solid carbide option that maintains consistent tolerancing across production runs, making it a practical choice for job shops, tool rooms, and production machining environments.

Key Features

• Solid carbide construction for rigidity and wear resistance
• TiAlN PVD coating rated for steel, stainless steel, cast iron, superalloys, titanium, and hard materials
• 4-flute, single-end ball nose geometry supports roughing and finishing in one tool
• 30-degree medium helix angle promotes chip flow and surface finish
• Straight-cylindrical shank for standard collet or end mill holder mounting
• Nose radius of 0.1719 inches consistent with 0.3438-inch ball diameter

Compatibility

Designed for use in standard CNC machining centers and manual mills accepting a 0.3750-inch straight shank. Compatible workpiece materials include steel, stainless steel, cast iron, non-ferrous metal, superalloys, titanium, and hard materials per OSG material codes P, M, K, N, S, and H.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Secure the shank fully into a collet or end mill holder to the recommended engagement depth before tightening. Confirm spindle direction is set to right-hand rotation before running. Inspect the cutting edges for chips or coating damage before use, especially after storage.