Helical Solutions 59401 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The HELICAL SOLUTIONS 59401 is a 5-flute, solid carbide corner radius end mill designed for aggressive roughing in steel, cast iron, stainless steel, and superalloys including titanium. It carries a 3/8 inch mill diameter, a 0.50 mm (0.0200 inch) corner radius, and a 1/2 inch length of cut. The APLUS PVD coating improves wear resistance and heat management during high-load material removal. Variable pitch flute spacing reduces harmonic chatter, making this tool well suited to high-speed roughing passes where surface finish is secondary to metal removal rate. Chipbreaker geometry further assists chip evacuation in deep pockets and slotting operations.

This end mill is engineered for machining low-alloy steel, medium alloy steel, tool steel, and cast iron as primary workpiece materials, with secondary capability in stainless steel, superalloys, and titanium. It is a single-end, centercutting tool with right-hand flute direction and right-hand cutting direction, making it compatible with standard CNC vertical and horizontal machining centers. The stub length profile and straight-cylindrical shank are matched to high-precision toolholders for maximum rigidity during roughing cycles. This is part of the HEV-C-5 series.

Key Features

• 5-flute variable pitch design reduces chatter during roughing operations
• Chipbreaker geometry promotes chip evacuation in slots, pockets, and deep cuts
• APLUS PVD coating extends tool life in ferrous and high-temp alloy materials
• 0.50 mm corner radius protects cutting edge and reduces corner chipping
• Centercutting capability allows plunge entry without a pre-drilled hole
• Solid carbide construction maintains dimensional stability under high cutting loads

Compatibility

Designed for use with high-precision toolholders. Primary workpiece materials are steel and cast iron; secondary workpiece materials are stainless steel, superalloys, and titanium. Part of the HELICAL SOLUTIONS HEV-C-5 series of corner radius chipbreaker roughers.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine placed in a safe, de-energized state. Seat the straight-cylindrical shank fully into a clean, high-precision toolholder and verify runout against the specified TIR maximum before commencing a cut. Do not exceed the rated length of cut when programming axial depth, and verify that coolant-through is not required by your application since this tool does not support it.