Accupro 312253 Corner Radius End Mill 5/8 in 5 Flute

Product Description

The ACCUPRO 312253 is a single-end, corner radius end mill designed for high-performance milling in demanding machining environments. Built from micrograin solid carbide and coated with AlCrTiN, this tool is engineered for cutting ferrous and hardened materials where heat resistance and edge retention are critical. It features a 5/8-inch cutting diameter, a 0.030-inch corner radius, and a 5-flute variable-index geometry with a 38-degree helix angle. The centercutting design allows plunge entry. This end mill is intended for use by professional machinists and CNC operators running production or toolroom operations.

This end mill is suited for milling applications in CNC machining centers where extended reach is required. The 1-5/8-inch reach length and reduced neck diameter of 0.593 inches allow clearance in deep-cavity or shoulder milling scenarios. The right-hand flute direction and right-hand cutting configuration are standard for conventional vertical and horizontal CNC mill setups. It is applicable in aerospace, die and mold, and general precision machining work where tight tolerances and surface finish quality matter.

Key Features

• Micrograin solid carbide substrate provides superior hardness and wear resistance compared to HSS tooling
• AlCrTiN coating improves oxidation resistance and extends tool life in dry or high-speed cutting conditions
• 5-flute, variable-index design reduces chatter and improves surface finish at higher feed rates
• 0.030-inch corner radius protects the cutting edge and reduces stress concentration at part corners
• Extended reach with 1-5/8-inch reach length and reduced neck for deep-cavity access
• Centercutting geometry enables direct plunge milling without a pre-drilled entry point

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for CNC machining centers accepting a 5/8-inch shank diameter toolholder.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle and toolholder are fully de-energized and at a complete stop before inserting or removing the end mill. Use a properly sized collet or end mill holder matched to the 5/8-inch shank diameter and torque the retention system per the toolholder manufacturer specifications. Verify runout with a dial indicator after installation before initiating a cutting pass.