Helical Solutions 87148 Corner Radius End Mill 1/4 in 7 Flute

Product Description

The HELICAL SOLUTIONS 87148 is a 7-flute, solid carbide corner radius end mill designed for high-performance material removal in demanding machining applications. Built to the HEV-7 series specification, it features a 0.0100-inch corner radius, a 1/4-inch mill diameter, and a 1-1/4-inch length of cut. The Tplus PVD coating provides enhanced wear resistance and thermal stability when cutting stainless steel, high-temperature alloys, and hardened steels. Variable pitch geometry reduces harmonic vibration and chatter during aggressive cuts. This tool is intended for use in CNC machining centers by experienced machinists and tooling specialists working in precision manufacturing environments.

The 87148 is engineered for roughing and finishing operations on stainless steel, high-temperature alloys, and hard materials including hardened steel. Its long-reach geometry and 3-inch overall length make it suitable for deeper cavity work and pocket milling where standard-length tools fall short. Secondary workpiece compatibility includes steel and cast iron. The straight cylindrical shank fits standard collet-style and high-precision toolholders, making it a practical choice for tight-tolerance production runs and aerospace or medical component work.

Key Features

• 7-flute variable-pitch design reduces chatter and improves surface finish in hard and abrasive materials
• Tplus PVD coating extends tool life on stainless steel, high-temperature alloys, and hardened steels
• 0.0100-inch corner radius with a tight tolerance of -0.0020 to 0.0020 inches for consistent edge geometry
• Solid carbide construction delivers rigidity and heat resistance at elevated cutting speeds
• Single-end, right-hand cut with right-hand spiral flutes; suitable for conventional CNC milling setups
• Designed for use with high-precision toolholders to maximize TIR performance (max TIR 0.0005 inches)

Compatibility

Designed for use with high-precision toolholders. Primary workpiece materials include stainless steel, high-temperature alloys, and hard materials. Secondary workpiece materials include steel and cast iron.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer's clamping specifications. Always power down and lock out the CNC spindle before changing tooling. Seat the shank fully and evenly in the collet or toolholder to minimize runout; the maximum rated TIR for this tool is 0.0005 inches. Inspect the cutting edges for chipping or coating wear before each use and replace the tool if damage is visible.