Sgs 77143 Corner Radius End Mill 3/8 in 7 Flute Carbide

Product Description

The SGS 77143 is a solid carbide corner radius end mill designed for high-performance finishing operations in demanding materials. With a 3/8 inch mill diameter, 7 flutes, and a 0.015 inch corner radius, this tool delivers a fine surface finish while maintaining edge integrity under heavy cutting loads. The close pitch and variable index geometry help reduce chatter and harmonic vibration. A TiN coating increases surface hardness and wear resistance. Licensed machinists, tool and die makers, and CNC operators use this end mill for finishing passes in steel, stainless steel, cast iron, superalloys, and titanium.

The SGS 77143 belongs to the Series 77C and is built for finishing applications where tight tolerances and surface quality are critical. It is suited for use in end mill holders on CNC machining centers handling steel, stainless steel, cast iron, superalloys, and titanium. The right-hand flute direction and right-hand cutting action are standard for conventional vertical and horizontal milling setups. With a 1.625 inch length of cut and 3 inch overall length, it accommodates moderate-depth finishing passes in both production and job-shop environments.

Key Features

• Solid micrograin carbide construction for rigidity and edge sharpness in hard and abrasive materials
• 7-flute, close-pitch design maximizes chip contact for smooth finishing passes
• Variable index flute spacing reduces chatter and vibration during the cut
• TiN coating improves surface hardness and extends tool life in ferrous materials
• 0.015 inch corner radius protects the cutting edge and reduces stress concentrations at shoulder corners
• Chipbreaker geometry helps manage chip evacuation during finishing cuts
• Single-end, straight-cylindrical shank fits standard end mill holders without adapters

Compatibility

Designed for use with end mill holders on CNC machining centers. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium. Secondary application covers hard materials. Not centercutting; this tool is intended for peripheral and finishing passes, not plunge cutting.

Installation Notes

Installation should be performed by qualified machinists or CNC operators with the machine fully powered down and the spindle locked before tooling changes. Seat the straight-cylindrical shank fully into the end mill holder and torque the retention mechanism to the holder manufacturer specification. Confirm runout with a dial indicator before engaging the workpiece. This tool is not centercutting and should not be used for plunge or drill-entry operations.