Accupro 310383 Corner Radius End Mill 5/8 in 4 Flute Carbide

Product Description

The ACCUPRO 310383 is a solid carbide corner radius end mill designed for precision milling operations where edge integrity and tool life under high-heat conditions are critical. It measures 0.625 inches in diameter with a 1.25-inch length of cut and a 3.5-inch overall length. The 4-flute, right-hand spiral geometry combined with a 38-degree variable-index helix promotes chip evacuation and reduces chatter during aggressive passes. The AlCrTiN coating delivers high oxidation resistance and hardness retention at elevated cutting temperatures, extending tool life in ferrous and hardened materials. Center-cutting capability allows plunge entry without a pre-drilled pilot hole.

This end mill is suited for use in CNC machining centers and manual vertical mills across job shop, tool-and-die, and production environments. It handles slotting, profiling, and ramping operations in steel, stainless steel, cast iron, and similar materials. The 0.090-inch corner radius reduces stress concentration at the cutting edge and leaves a controlled radius on inside workpiece corners. The straight cylindrical shank at 0.625 inches diameter seats directly in standard ER or side-lock toolholders without adapters. It is a single-end tool from the Series HS line, built on a micrograin carbide substrate for consistent edge geometry across the cutting length.

Key Features

• Solid micrograin carbide substrate for rigidity and edge retention in hard materials
• AlCrTiN coating provides oxidation resistance and extended tool life at high cutting temperatures
• 4-flute right-hand spiral with 38-degree helix and variable index for reduced harmonic vibration
• 0.090-inch corner radius minimizes edge chipping and produces consistent workpiece corner geometry
• Center-cutting design permits direct plunge entry without pilot drilling
• Straight cylindrical shank at 0.625 inches for broad toolholder compatibility

Compatibility

Designed as an OEM-style replacement and direct-fit solid carbide corner radius end mill for CNC and manual milling applications requiring a 0.625-inch diameter, 0.625-inch straight shank tool.

Installation Notes

Installation is performed by machinists using a torque wrench and calibrated toolholder to the machine spindle specification. Ensure the spindle is fully stopped and the machine is in an e-stop or powered-down state before changing tooling. Seat the shank fully into the collet or toolholder chuck and verify runout with a dial indicator before beginning a cut. Do not exceed the tool manufacturer recommended depth-of-cut for the workpiece material to avoid deflection or premature edge failure.