Gws 121518 Corner Radius End Mill 3/16 in 4 Flute Carbide

Product Description

The GWS 121518 is a solid carbide corner radius end mill designed for high-performance milling in ferrous and difficult-to-machine materials. With a 3/16 inch (0.1875 inch) mill diameter, a 0.015 inch corner radius, and four helical flutes, this tool delivers a balance of cutting stability and surface finish quality in a single-end, centercutting configuration. The variable helix and variable index geometry reduce harmonic vibration and chatter, making it well suited for both roughing and finishing passes. Overall length is 2 inches, and the straight cylindrical shank is ground to an h6 tolerance for accurate seating in end mill holders.

This end mill is intended for use by machinists and toolroom professionals working on CNC machining centers and manual mills. Primary workpiece materials include steel, cast iron, superalloys, titanium, and hard materials. It also performs in stainless steel applications as a secondary material category. The 3/4 inch length of cut and long-length geometry provide reach into pockets, slots, and contoured features where a standard-length tool would fall short. It is sold as a single-end tool and is compatible with standard end mill holders.

Key Features

• Solid carbide submicron-grade construction for strength and wear resistance in hard and abrasive workpiece materials
• 0.015 inch corner radius reduces stress concentration at cutting edges and extends tool life in slot and pocket milling
• Variable helix and variable index design actively dampens vibration for improved surface finish and reduced chatter
• Centercutting geometry allows direct plunge entry into workpiece material
• Right-hand flute direction and right-hand cutting orientation for standard CNC spindle operation
• Shank diameter ground to h6 tolerance for precise fit in end mill holders

Compatibility

Designed for use with standard end mill holders. Primary workpiece materials are steel, cast iron, superalloys, titanium, and hard materials. Stainless steel is a rated secondary workpiece material. Series 1030.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully into the end mill holder and torque the retention mechanism to the holder manufacturer specification. Confirm runout with a dial indicator before commencing a cut, particularly when working with hard or abrasive materials where tool deflection can accelerate edge wear.