Osg 403-3750-BN Ball End Mill 3/8 in 3 Flute Solid Carbide

Product Description

The OSG 403-3750-BN is a solid carbide ball end mill designed for material removal in both roughing and finishing operations. Part of the OSG 403BN series, it features a 3/8 inch cutting diameter with a matching 3/8 inch straight-cylindrical shank, three spiral flutes, and a 30-degree medium helix angle. The bright uncoated finish suits a wide range of workpiece materials. At 2.5 inches overall length with a 1 inch length of cut, this is a single-end, standard-length tool intended for use by machinists and CNC operators in production and job-shop environments.

This ball end mill is suited for milling operations across a broad spectrum of materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. The 3/8 inch ball nose profile makes it appropriate for contour milling, profiling, slotting, and finishing passes on complex 3D surfaces. Right-hand cut and right-hand flute direction are standard for conventional CNC milling setups. No extended reach, no coolant-through capability, and no chipbreaker — straightforward geometry for general-purpose work.

Key Features

• Solid carbide construction for rigidity and wear resistance across multiple workpiece materials
• 3/8 inch ball nose diameter with a 0.1875 inch nose radius for accurate profiling and contouring
• Three spiral flutes with a 30-degree medium helix angle for balanced chip evacuation
• Single-end configuration; right-hand cut and right-hand flute direction
• Bright/uncoated finish compatible with steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials
• Mill diameter tolerance of +0.0000 / -0.0020 inches for consistent part-to-part accuracy

Compatibility

Suitable for use on CNC machining centers and manual mills accepting a 3/8 inch straight-cylindrical shank. Compatible workpiece materials include steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials (ISO material codes P, M, K, N, S, H).

Installation Notes

Installation is performed by machinists or CNC setup technicians. Secure the shank in a collet or end mill holder rated for the 3/8 inch shank diameter, ensuring proper seating depth before tightening. Confirm spindle and tool holding are free of runout before beginning a cut. Follow machine tool manufacturer guidelines for speeds, feeds, and depth of cut appropriate to the workpiece material and operation type.