Osg 414-4375-BN Ball End Mill 0.4375 in 4 Flute Carbide

Product Description

The OSG 414-4375-BN is a solid carbide ball end mill designed for precision milling operations across a broad range of workpiece materials. With a 0.4375-inch (7/16 inch) mill diameter, a 0.625-inch length of cut, and a 4-flute helical configuration, this tool delivers consistent material removal in both roughing and finishing passes. The micrograin carbide substrate supports sharp edge retention and dimensional accuracy. The 30-degree medium helix angle promotes efficient chip evacuation while maintaining surface finish quality. It runs single-end, right-hand cut, with a straight-cylindrical shank, and is part of OSG's 414BN series. Machinists and toolroom professionals use this end mill in CNC machining centers and manual mills alike.

This end mill is suited for milling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. The uncoated bright finish makes it a straightforward choice for shops that prefer to apply their own coatings or work with materials where coated tooling is unnecessary. At 2.5 inches overall length with a 0.4375-inch shank diameter matching the cutter diameter, it fits standard collet and end mill holder setups without the need for specialty tooling adapters. It is appropriate for general-purpose contouring, profiling, and slot milling where a ball nose geometry is required.

Key Features

• 0.4375-inch (7/16 inch) ball nose diameter with a 0.2188-inch nose radius for accurate 3D contouring
• 4-flute helical design supports both roughing and finishing in a single tool
• Micrograin solid carbide substrate for edge stability in hard and abrasive materials
• 30-degree medium helix angle for balanced chip flow and surface finish
• Uncoated bright finish compatible with steel, stainless, cast iron, non-ferrous, superalloys, and hard materials
• Straight-cylindrical shank fits standard collet chucks and end mill holders

Compatibility

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). Designed as a standard-length single-end ball end mill for use in CNC machining centers and conventional milling machines equipped with 7/16-inch collets or end mill holders.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered off and the spindle fully stopped. Ensure the collet or end mill holder is clean and free of debris before seating the shank, and torque the retention hardware to the machine or toolholder manufacturer's specification. Verify runout with a dial indicator after clamping before beginning any cut. Follow applicable shop safety protocols and machine manufacturer guidelines for speeds and feeds based on workpiece material and depth of cut.