Promax US007226 Corner Radius End Mill 3/4 in 4 Flute

Product Description

The PROMAX US007226 is a solid carbide corner radius end mill engineered for demanding material removal in both roughing and finishing operations. It features a 3/4 inch cutting diameter, a 1-5/8 inch length of cut, and a 0.030 inch corner radius that extends tool life by distributing cutting forces away from a sharp edge. The four-flute, right-hand spiral design runs in a variable helix and variable index configuration, reducing harmonic vibration and chatter during high-load cuts. The proprietary PROMAX PowerLayer coating provides thermal and abrasion resistance suited to aggressive feed rates. Overall length is 4 inches with a straight-cylindrical 3/4 inch shank sized for standard toolholders.

This end mill is designed for machinists and tool-and-die professionals working in production CNC milling environments. It is center-cutting and capable of both plunge and peripheral cutting operations. The coarse pitch and variable helix geometry make it well suited for interrupted cuts, slotting, and profiling in a wide range of workpiece materials. It is a single-end tool intended for use with a compatible toolholder in vertical or horizontal machining centers.

Key Features

• Solid micrograin carbide substrate for rigidity and wear resistance
• PROMAX PowerLayer coating for thermal protection and extended tool life in ferrous and non-ferrous materials
• Variable helix and variable index geometry reduces vibration and chatter during heavy cuts
• 0.030 inch corner radius distributes cutting load and reduces chipping at the cutting edge
• Center-cutting design allows direct plunge entry without a pre-drilled pilot hole
• Right-hand cut, right-hand flute direction with coarse pitch for efficient chip evacuation

Compatibility

Designed for use with standard straight-bore toolholders accepting a 3/4 inch cylindrical shank. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, titanium, and non-ferrous metals (ISO material codes P, M, K, S, N).

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer's clamping torque and runout specifications. Ensure the machine spindle is fully stopped and the control is in an e-stop or safe state before loading or removing the tool. Verify shank seating depth and runout with a dial indicator before committing to a full-depth cut. Do not exceed the toolholder's maximum RPM rating for the shank diameter.