Accupro 311872 Square End Mill 1in 5 Flute Solid Carbide

Product Description

The ACCUPRO 311872 is a single-end, 5-flute square end mill engineered for high-performance milling in demanding metalworking applications. Built from micrograin solid carbide and coated with AlTiCrN, it handles elevated cutting temperatures and abrasive workpiece materials without sacrificing edge life. The 1 inch mill diameter pairs with a 2 inch length of cut, a 1 inch shank diameter, and a 38-degree helix angle. Variable index spacing reduces harmonic chatter during aggressive cuts, making it well suited for roughing and finishing passes where tool stability matters. This tool is installed and operated by machinists and CNC programmers in professional shop environments.

The 311872 fits standard 1 inch toolholders including end mill holders, shrink-fit chucks, and hydraulic chucks commonly found on vertical and horizontal machining centers. The 4 inch overall length keeps the tool compact enough for general-purpose cavity and profile milling while still reaching typical workpiece depths. Its right-hand cut, right-hand spiral flute configuration makes it compatible with conventional CNC spindle setups. Applications include slotting, profiling, and contouring in ferrous alloys, hardened steels, stainless, and cast iron where AlTiCrN coating performance is an advantage over TiN or TiAlN alternatives at higher surface speeds.

Key Features

• Micrograin solid carbide substrate provides rigidity and wear resistance for hard material milling
• AlTiCrN coating extends tool life in high-temperature cutting conditions including dry and near-dry machining
• 38-degree helix angle promotes smooth chip evacuation and reduces cutting forces on each flute
• Variable index flute spacing dampens vibration and chatter during aggressive cuts
• Centercutting geometry allows plunge entry directly into the workpiece
• Single-end design concentrates full substrate mass behind the cutting edge for maximum rigidity

Compatibility

Designed for use in 1 inch bore end mill holders, shrink-fit chucks, and hydraulic chucks on CNC machining centers. Part of the ACCUPRO HS series of solid carbide end mills.

Installation Notes

Installation is performed by a machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool changer is in a safe state before mounting or removing the tool. Verify holder bore condition and runout with a dial indicator before use, as excessive runout accelerates edge wear on carbide tooling. Follow the toolholder manufacturer torque specifications when securing set screws or clamping nuts.