Sgs 77157 Corner Radius End Mill 3/8 in 7 Flute Carbide

Product Description

The SGS 77157 is a solid carbide corner radius end mill designed for high-performance finishing operations in demanding materials. It features a 3/8 inch diameter with a 0.0300 inch corner radius, seven flutes, and a 37-degree high helix angle. The 1-1/8 inch length of cut and 3-1/4 inch overall length suit it for reaching into deeper pockets and profiles. A TM coating extends tool life in abrasive and hard workpiece materials. The variable index flute spacing reduces chatter and improves surface finish. This tool is part of the SGS Series 77C and is installed and used by machinists and tool-and-die professionals in production and job-shop environments.

The SGS 77157 is suited for finishing passes in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. Its close pitch, right-hand cutting geometry, and solid micrograin carbide construction make it appropriate for tight-tolerance contour milling, profiling, and pocket finishing. The straight cylindrical shank accepts standard end mill toolholders. It is a single-end tool intended for use on CNC machining centers and manual mills where consistent surface quality and dimensional accuracy are required.

Key Features

• 0.0300 inch corner radius with tolerance of +0.00000 to -0.00200 inches for controlled edge blending
• Seven-flute, close-pitch design optimized for finishing passes and improved surface finish
• 37-degree high helix angle reduces cutting forces and improves chip evacuation
• Variable index flute spacing minimizes harmonic vibration during cutting
• TM coating enhances wear resistance in steel, stainless steel, cast iron, superalloys, and hard materials
• Micrograin solid carbide substrate provides rigidity and edge retention in difficult-to-machine alloys

Compatibility

Designed for use with standard end mill toolholders. Compatible with primary workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium, as well as secondary hard materials. Part of the SGS Series 77C product family.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. The machine spindle must be fully stopped and the toolholder must be clean and free of chips or debris before mounting. Confirm shank diameter tolerance class h6 is compatible with the toolholder bore before seating. Do not exceed the recommended axial depth of cut for a finishing end mill of this flute count and diameter.