Osg 5976400 Tapered End Mill 10 Deg Cobalt 3 Flute

Product Description

The OSG 5976400 is a cobalt tapered end mill designed for precision milling operations requiring a controlled taper profile. Built from M42 cobalt high-speed steel, it delivers strong wear resistance and heat tolerance in demanding cutting environments. The tool features a 10-degree taper angle per side, a 0.25-inch small end diameter, and a 2.25-inch length of cut. Three spiral flutes with a 25-degree helix angle promote efficient chip evacuation and smooth cutting action. The square end geometry makes it suitable for profiling, slotting, and mold and die work. Licensed machinists and CNC operators are the primary installers of this tooling.

This end mill fits applications in mold making, die work, aerospace component machining, and general metalworking where a tapered wall profile is required. The 0.75-inch shank diameter provides rigid coupling to standard end mill holders and collet chucks. The uncoated finish makes it appropriate for use with cutting fluids where coating adhesion is not a priority. It is suited for both manual mill setups and CNC machining centers running ferrous and non-ferrous materials. The Series 597 designation identifies its place within the OSG standard tapered end mill product line.

Key Features

• 10-degree taper angle per side for controlled wall draft in mold and die profiles
• M42 cobalt construction provides elevated heat and wear resistance over standard HSS
• Three spiral flutes with 25-degree helix angle for efficient chip removal
• Square end geometry supports profiling, slotting, and contour milling
• Center-cutting design allows plunge entry without a pre-drilled hole
• Right-hand flute direction for standard spindle rotation compatibility

Compatibility

Designed as a standard tapered end mill replacement for machining centers and manual mills accepting a 0.75-inch shank diameter. Part of the OSG Series 597 tapered end mill family.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the 0.75-inch shank in a properly sized collet chuck or end mill holder, ensuring full seating to the recommended gauge length. Confirm spindle speed and feed rate are set per material and tool diameter before cutting. Inspect the cutting edges for chips or wear before each use, and never exceed the rated cutting parameters for cobalt tooling.