Accupro 311644 Corner Radius End Mill 1/2 in 5 Flute

Product Description

The ACCUPRO 311644 is a single-end, corner radius end mill designed for precision milling operations in metalworking and machining environments. Built from micrograin solid carbide and coated with AlCrTiN, it delivers strong wear resistance and heat tolerance in demanding cutting conditions. The 0.090-inch corner radius reduces stress concentrations at the tool tip, extending tool life in contour and pocket milling. With a 38-degree helix angle, 5 flutes, and a variable index design, it promotes smooth chip evacuation and reduced vibration. Licensed machinists and CNC operators working in job shops, production facilities, and tool rooms are the primary installers and users of this tool.

This end mill is suited for milling ferrous and hardened materials where a corner radius profile is required to blend floor-to-wall transitions in pockets, slots, and profiles. The 1/2-inch diameter and 1-1/4-inch length of cut make it appropriate for moderate-depth passes in vertical machining centers and CNC mills. The 1/2-inch shank fits standard ER and end mill holders. Right-hand flute direction and right-hand cutting orientation are standard for conventional CNC spindle setups.

Key Features

• Micrograin solid carbide substrate for rigidity and wear resistance
• AlCrTiN coating for elevated heat resistance and extended tool life in ferrous materials
• 0.090-inch corner radius reduces tip stress and improves surface finish at floor-to-wall intersections
• 5-flute, variable index design minimizes chatter and improves chip evacuation
• 38-degree helix angle promotes smooth cutting action in deep-reach applications
• Centercutting geometry allows plunge entry without a pre-drilled pilot hole

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC vertical machining centers and manual mills accepting a 1/2-inch shank end mill holder.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before seating the shank. Torque the tool holder to the machine and holder manufacturer specifications — do not estimate. Verify runout with a dial indicator before commencing cuts, as excessive runout will accelerate wear on a 5-flute carbide tool.