Gws 122620 Corner Radius End Mill 1/4 in 7 Flute Carbide

Product Description

The GWS 122620 is a 7-flute solid carbide corner radius end mill designed for high-performance finishing operations in demanding materials. It features a 1/4-inch diameter with a 0.015-inch corner radius and a 5/16-inch length of cut. The variable helix and variable index geometry reduce chatter and harmonic vibration, making it well suited for tight-tolerance finishing passes. Built from submicron-grade carbide, this single-end, center-cutting tool runs in a right-hand cutting direction with a straight-cylindrical shank held to h6 tolerance. Licensed machinists and CNC setup technicians are the primary users of this tool.

This end mill is intended for finishing applications in steel, cast iron, superalloys, titanium, stainless steel, and hard materials. The close-pitch, 7-flute configuration increases the number of cutting edges in contact, which improves surface finish quality on ferrous and exotic alloys. It fits standard end mill holders and is appropriate for CNC machining centers running high-speed finishing programs where edge geometry consistency is critical. The short length-type design provides added rigidity to minimize deflection during light radial passes.

Key Features

• 0.015-inch corner radius protects the cutting edge and improves surface finish on finished walls and floors
• 7-flute, close-pitch design maximizes material removal rate at finishing chip loads
• Variable helix and variable index geometry reduce chatter and vibration during finishing passes
• Submicron solid carbide substrate provides hardness and wear resistance in abrasive workpiece materials
• Center-cutting capability allows plunge entry without a pre-drilled clearance hole
• h6 shank tolerance ensures accurate, repeatable tool holding in end mill holders

Compatibility

Designed for use with standard end mill holders. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, titanium, and hard materials as specified by the manufacturer.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is fully stopped and power is locked out before changing tooling. Seat the straight-cylindrical shank fully into the end mill holder and torque the retention mechanism to the holder manufacturer's specification. Confirm runout with a dial indicator before beginning a production run, as excessive runout on a 7-flute tool will accelerate uneven flute wear and degrade surface finish.