Gws 121543 Corner Radius End Mill 5/8 in 4 Flute Carbide

Product Description

The GWS 121543 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining applications. It features a 5/8 inch (0.6250 inch) cutting diameter with a 0.03 inch corner radius, a 2-1/4 inch length of cut, and a 5 inch overall length. The 4-flute, single-end geometry supports both roughing and finishing operations. A variable helix and variable index design reduce harmonic vibration during cuts, improving surface finish and tool life. The straight cylindrical shank measures 5/8 inch in diameter with an h6 tolerance, compatible with standard end mill holders.

This end mill is suited for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The long-series flute length makes it appropriate for deeper cavity work, profiling, and slotting operations where extended reach into a workpart is needed. The centercutting geometry allows for plunge entry. It is used by machinists and tool-and-die professionals in CNC milling operations across job shop and production environments.

Key Features

• 0.03 inch corner radius reduces edge chipping and improves corner strength in workpieces
• Variable helix and variable index geometry minimize chatter and vibration during aggressive cuts
• Centercutting design permits direct plunge milling without a pre-drilled entry point
• 4-flute helical flute configuration supports both roughing and finishing in a single tool
• Submicron carbide grade provides wear resistance in hard and abrasive workpiece materials
• Right-hand cut, right-hand flute direction for standard CNC spindle compatibility

Compatibility

Designed for use with standard end mill holders. Primary workpiece materials include steel, cast iron, superalloys, and titanium. Secondary workpiece material is stainless steel. Series 1030 long-series tooling platform.

Installation Notes

Installation should be performed by a qualified machinist following shop-standard toolholding procedures. Ensure the end mill holder is clean and free of debris before seating the shank; the h6 shank tolerance requires a properly matched collet or holder bore for secure clamping. Confirm spindle rotation direction matches the right-hand cutting geometry before initiating a cut. Follow machine tool manufacturer guidelines for runout and stick-out specifications to maintain tool life and part accuracy.