Sgs 77271 Corner Radius End Mill 3/4 in 7 Flute Carbide

Product Description

The SGS 77271 is a solid carbide corner radius end mill engineered for high-performance finishing cuts in demanding metalworking applications. It features a 3/4 inch mill diameter, a 0.06 inch corner radius, and 7 helical flutes ground to a close pitch for smooth chip evacuation and surface finish quality. The TiN coating improves wear resistance and extends tool life in ferrous and hard material cutting. With a 2-1/4 inch length of cut and a 4-1/2 inch overall length, this is a single-end, straight-shank tool designed for use in end mill holders on CNC machining centers and manual mills. It belongs to the SGS Series 77C and uses micrograin carbide substrate for edge retention under load.

This end mill is built for finishing operations on steel, stainless steel, cast iron, superalloys, and titanium. The high helix angle promotes efficient chip removal in these tough materials. The 37-degree helix and variable index geometry help reduce harmonics during cut, making it suitable for finishing passes where surface finish and dimensional accuracy are critical. Secondary application includes hard material milling. Typical installations involve CNC vertical machining centers and milling machines using standard end mill holder tooling. The right-hand flute direction and right-hand cutting rotation are standard for conventional machine spindle configurations.

Key Features

• Solid micrograin carbide construction for edge retention in ferrous and hard materials
• 0.06 inch corner radius with a tight tolerance of -0.0020 to 0.0000 inches for precise radius blending
• 7-flute close-pitch design optimized for finishing cuts with fine chip loads
• TiN coating for extended wear resistance in steel and stainless steel applications
• Variable index flute spacing reduces chatter and vibration during finishing passes
• Chipbreaker geometry aids chip control during extended cuts in difficult materials

Compatibility

Designed for use with standard end mill holders. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium. Secondary workpiece material is hard material. Belongs to SGS Series 77C.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. The machine spindle must be fully stopped and the machine powered down before tooling changes. Use a properly sized end mill holder matched to the 3/4 inch straight-cylindrical shank and torque to the holder manufacturer specification. Verify runout with a dial indicator after seating to ensure dimensional accuracy during finishing operations.