Helical Solutions 81794 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The HELICAL SOLUTIONS 81794 is a solid carbide corner radius end mill engineered for high-performance material removal in demanding machining environments. Measuring 3/8 inch in diameter with a 1/2-inch length of cut and a 0.50 mm (0.0200 inch) corner radius, this tool is built for both roughing and finishing operations on steel, cast iron, stainless steel, superalloys, and titanium. The 5-flute geometry with variable pitch delivers superior chip evacuation and reduced harmonic vibration. An APLUS PVD coating extends tool life in abrasive and heat-generating cuts. This end mill is appropriate for machinists and tooling specialists operating CNC milling equipment in precision manufacturing and job shop environments.

The 81794 is suited for applications in aerospace, die and mold, and general machining where tight tolerances and surface finish are critical. Its extended reach design, with a 1-5/8-inch reach length and a 0.3560-inch neck diameter, allows access to deep pockets and stepped features without sacrificing rigidity. Primary workpiece materials include low-alloy steel, medium alloy steel, tool steel, and cast iron. Secondary applications include stainless steel, superalloys, and titanium. The single-end, centercutting configuration supports both plunge and conventional milling paths. This tool is designed for use with high-precision toolholders to maintain TIR within 0.0005 inch.

Key Features

• 5-flute variable-pitch geometry reduces chatter and supports aggressive feed rates in both roughing and finishing passes
• APLUS PVD coating provides enhanced hardness and heat resistance for extended tool life in ferrous and difficult-to-machine materials
• 0.50 mm corner radius (0.0200 inch) protects the cutting edge and improves surface finish at workpiece corners
• Extended reach design with 1-5/8-inch reach length and reduced neck diameter enables deep-pocket and stepped-feature machining
• Centercutting, right-hand flute direction enables plunge entry without a pilot hole
• Straight-cylindrical shank with h6 tolerance ensures accurate, repeatable seating in collet and hydraulic toolholders

Compatibility

Designed for use with high-precision toolholders. Part of the HELICAL SOLUTIONS HEV-RN-5 series. Compatible with CNC milling centers capable of accepting a 3/8-inch straight-cylindrical shank.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the control is in an E-stop or tool-change state before inserting or removing end mills. Seat the shank fully and evenly in the toolholder to the recommended gauge line before tightening; do not overhang beyond the specified reach length. Use high-precision collet or hydraulic toolholders as specified to maintain TIR at or below 0.0005 inch and prevent premature tool wear or breakage.