Helical Solutions 43077 Corner Radius End Mill 3/16in 4 Flute

Product Description

The HELICAL SOLUTIONS 43077 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining environments. Built to the HSV-4 series specification, it features a 3/16 inch (0.1875 inch) mill diameter with a 0.0300 inch corner radius and a 5/16 inch (0.3125 inch) length of cut. The four-flute, single-end configuration with variable pitch and right-hand spiral flutes supports both roughing and finishing operations. An APLUS PVD coating improves wear resistance and tool life across ferrous materials. This tool is installed and operated by machinists and CNC tooling technicians working with precision cutting applications.

The 43077 is suited for machining steel, cast iron, low-alloy steel, medium alloy steel, and tool steel. The stub-length geometry keeps deflection low in tight-clearance setups. The straight cylindrical shank with 3/16 inch diameter and h6 shank diameter tolerance ensures consistent seating in high-precision toolholders. Variable pitch reduces harmonic chatter during aggressive cuts, making this end mill effective in both roughing passes and finish contouring on ferrous workpieces.

Key Features

• 0.0300 inch corner radius with tolerance of -0.0020 to 0.0020 inches for consistent edge blending
• APLUS PVD coating rated for steel and cast iron applications
• Variable pitch flute geometry reduces chatter in roughing and finishing passes
• Solid carbide construction provides rigidity and wear resistance
• Stub-length design minimizes deflection in close-quarter setups
• Maximum TIR of 0.0005 inches for tight runout control in precision toolholders

Compatibility

Designed for use with high-precision toolholders. Primary workpiece materials are steel, cast iron, low-alloy steel, medium alloy steel, and tool steel (material codes P and K).

Installation Notes

This end mill is installed by machinists and CNC tooling technicians. Before tooling changes, ensure the spindle is fully stopped and the machine is in a safe, locked-out state. Use a high-precision toolholder to take full advantage of the h6 shank tolerance and 0.0005 inch maximum TIR specification. Do not exceed the recommended depth of cut for the stub-length geometry, as overextension can cause premature tool failure.