Gws 121503 Corner Radius End Mill 5/8 in 4 Flute Carbide

Product Description

The GWS 121503 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining environments. Built on the Series 1030 platform, it features a 5/8 inch cutting diameter, a 0.03 inch corner radius, and 4 flutes arranged in a variable helix configuration. The variable helix and variable index geometry help reduce chatter and improve surface finish during both roughing and finishing passes. At 3.5 inches overall length with a 1.5 inch length of cut, it fits standard end mill holders with a straight-cylindrical shank. This tool is intended for use by machinists and CNC operators working in production and job shop environments.

The 121503 is suited for cutting steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The short flute length and submicron carbide substrate make it a strong choice for applications requiring tight tolerances and consistent tool life in ferrous and exotic workpiece materials. It is a single-end, center-cutting design, capable of plunge entry and full slot milling where machine rigidity permits.

Key Features

• Variable helix and variable index geometry reduces harmonic vibration and chatter during aggressive cuts
• 0.03 inch corner radius protects the cutting edge and improves corner durability in hardened materials
• 4-flute, right-hand cut, right-hand flute configuration optimized for roughing and finishing in a single tool
• Submicron solid carbide substrate delivers hardness and wear resistance in high-temperature cutting conditions
• Center-cutting design allows direct plunge entry without a pre-drilled pilot hole
• Straight-cylindrical shank with h6 tolerance for secure, repeatable seating in end mill holders

Compatibility

Designed for use with standard end mill holders accepting a 5/8 inch straight-cylindrical shank. Primary workpiece materials include steel, cast iron, superalloys, and titanium; secondary material is stainless steel.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the end mill holder and torque the retention mechanism to the holder manufacturer specification. Verify runout with a dial indicator before beginning a production run, as excessive runout will accelerate edge wear on carbide tooling.