Sgs 77242 Corner Radius End Mill 5/8 Inch 7 Flute Carbide

Product Description

The SGS 77242 is a solid carbide corner radius end mill engineered for finishing operations in ferrous and difficult-to-machine materials. It features a 5/8-inch mill diameter, a 0.06-inch corner radius, and 7 helical flutes ground from micrograin carbide. The AlTiN coating — marketed under SGS proprietary designation Ti-NAMITE-A — delivers thermal resistance and extended tool life in high-heat cutting environments. A close pitch configuration and variable index flute spacing reduce chatter and harmonics during aggressive passes. With a 2.5-inch length of cut and 4.5-inch overall length, this is a long-reach tool suited to deep-wall profiling and finishing passes where a standard-length end mill cannot reach.

The SGS 77242 is designed for finishing cuts in steel, stainless steel, cast iron, superalloys, and titanium, as well as hard materials. It is a single-end, right-hand cut, right-hand flute tool with a straight cylindrical shank compatible with standard end mill holders. The Series 77C geometry and close pitch make it particularly well suited to high-material-removal finishing passes on hardened workpieces. This tool is used primarily in CNC machining centers by machinists and toolroom professionals in job shop, aerospace, and precision manufacturing environments.

Key Features

• Micrograin solid carbide substrate provides rigidity and edge retention in hard and abrasive materials
• AlTiN (Ti-NAMITE-A) coating resists heat buildup during dry and high-speed cutting
• 7-flute, close-pitch configuration maximizes surface finish quality and feed rate capability
• Variable index fluting reduces resonance and chatter on deep-wall finishing passes
• 0.06-inch corner radius extends tool life and reduces edge chipping at the cutter tip
• Long-reach geometry: 2.5-inch length of cut on a 4.5-inch overall length tool
• Right-hand cut, right-hand helix, single-end design for use in standard end mill holders

Compatibility

Designed for use with standard end mill holders accepting a 5/8-inch straight cylindrical shank. Suitable for steel, stainless steel, cast iron, superalloys, titanium, and hard materials. Not centercutting; not recommended for direct plunge entry.

Installation Notes

Installation and tool changes must be performed by qualified machining personnel with the spindle fully stopped and the machine in a safe, locked-out state. Secure the straight cylindrical shank in a compatible end mill holder to the torque specifications required by the holder manufacturer. This tool is not centercutting and should not be used for direct plunge cuts; ramp or helical entry paths are required. Verify runout after clamping and before commencing a cut to protect both the tool and the workpiece.