Helical Solutions 88191 Corner Radius End Mill 0.1875 in 4 Flute

Product Description

The HELICAL SOLUTIONS 88191 is a solid carbide corner radius end mill designed for precision milling in steel and ferrous alloy applications. It features a 0.1875-inch diameter with a 1.0000-inch length of cut and a 0.0200-inch corner radius, making it well-suited for jobs that require a controlled edge blend without a sharp corner. The four-flute, single-end configuration with variable pitch indexing helps reduce harmonic vibration during aggressive cuts. An APLUS coating adds wear resistance and thermal protection, extending tool life in demanding ferrous machining environments.

This end mill is designed for use in CNC machining centers and vertical mills where steel and similar ferrous materials are being profiled, slotted, or finish-milled. The centercutting geometry allows plunge entry, giving machinists flexibility in toolpath programming. With a straight cylindrical shank of 0.1875 inches, it fits standard ER collet systems and most side-lock holders in that size range. It is a single-end tool intended for production or job-shop use where consistent corner geometry is required across repeated operations.

Key Features

• APLUS coating for extended tool life in ferrous and steel machining
• 0.0200-inch corner radius reduces stress concentration and chipping at cut edges
• Variable pitch flute spacing reduces chatter and harmonic vibration
• Centercutting design allows direct plunge entry into workpiece
• Solid carbide construction provides rigidity and heat resistance
• Right-hand cut and right-hand flute direction for standard CNC spindle use

Compatibility

Designed as an OEM-style replacement or direct-use tool for CNC machining setups requiring a 3/16-inch diameter corner radius end mill in the Steels series, 4-flute, variable-pitch configuration with APLUS coating.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the shank in a properly sized collet or tool holder, ensuring adequate engagement depth per shop standards before applying torque to the retention mechanism. Inspect runout with a dial indicator before initiating a cut, as excessive runout will accelerate wear on a four-flute carbide tool. Power down and lock out the spindle before changing or inspecting the tool.