Helical Solutions 43529 Corner Radius End Mill 1/2 in 4 Flute

Product Description

The HELICAL SOLUTIONS 43529 is a solid carbide corner radius end mill designed for high-performance material removal in steel and cast iron applications. It features a 1/2 inch diameter, a 1-1/4 inch length of cut, and a 0.1250 inch corner radius that reduces stress concentration at the cutting edge and extends tool life in both roughing and finishing passes. The 4-flute, single-end geometry with a variable pitch and right-hand spiral flute direction is built for machinists running aggressive toolpaths on CNC machining centers. The APLUS PVD coating provides enhanced wear resistance and heat dissipation at the cutting zone.

This end mill is suited for production and job-shop environments where low-alloy steel, medium alloy steel, tool steel, and cast iron are the primary workpiece materials. It fits the HSV-4 series and is intended for use with high-precision toolholders to maintain tight runout tolerances. With a 3 inch overall length and a 1/2 inch straight-cylindrical shank, it is a standard reach tool appropriate for a wide range of milling setups including slotting, profiling, and contouring where a corner radius is required to blend features or protect part edges.

Key Features

• 0.1250 inch corner radius with a tolerance of -0.0020 to 0.0020 inches for consistent edge geometry
• 4-flute variable pitch design reduces harmonic vibration during cuts
• APLUS PVD coating rated for steel and cast iron — extends cutting life in abrasive materials
• Right-hand cutting and flute direction; non-centercutting single end
• TIR maximum of 0.0005 inches ensures runout precision when seated in high-precision toolholders
• No chipbreaker geometry — suited for finishing passes as well as roughing

Compatibility

Designed for use with high-precision toolholders. Primary workpiece materials are low-alloy steel, medium alloy steel, tool steel, and cast iron (material codes P and K). Part of the HELICAL SOLUTIONS HSV-4 series.

Installation Notes

Installation is performed by machinists or toolroom technicians on CNC milling equipment. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the 1/2 inch straight-cylindrical shank fully and evenly in a high-precision collet or shrink-fit holder to stay within the 0.0005 inch TIR specification. Do not use worn or out-of-tolerance toolholders, as excess runout will accelerate corner radius wear and compromise part geometry.