Accupro 12177676 Corner Radius End Mill 5/16 in 4 Flute Altin

Product Description

The ACCUPRO 12177676 is a solid carbide corner radius end mill designed for high-performance milling in ferrous and non-ferrous materials. It features a 5/16 inch diameter with a 0.015 inch corner radius and a 4-flute, right-hand spiral configuration. The AlTiN coating provides thermal resistance and hardness retention at elevated cutting temperatures, extending tool life in demanding machining operations. The centercutting design allows for plunge milling as well as conventional peripheral and slot cutting. This tool is suited for use by machinists and tooling technicians working on CNC machining centers or manual mills requiring precision profile work.

This end mill is appropriate for finish and semi-finish milling operations where a controlled corner radius is required to reduce stress concentrations in machined pockets, slots, or profiles. The 3/4 inch length of cut and 2-1/2 inch overall length make it well suited for shallow-to-moderate depth applications in die and mold work, aerospace components, and general precision machining. The variable index flute spacing helps suppress chatter during interrupted cuts or when working in harder alloy steels.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• AlTiN coating for high-heat and high-speed cutting performance
• 0.015 inch corner radius reduces edge chipping and part stress risers
• 4-flute, right-hand cut with variable index for chatter reduction
• Centercutting capable — supports plunge, slot, and profile operations
• Single end design with 5/16 inch shank for standard collet or end mill holder compatibility

Compatibility

Designed as an OEM-style solid carbide corner radius end mill for use in standard 5/16 inch collets, end mill holders, or shrink-fit toolholders on CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, powered-down state before changing tooling. Seat the shank fully into the holder to the recommended gauge depth and torque the collet or set screw per the toolholder manufacturer specifications. Inspect the corner radius and cutting edges for chips or damage before each use, as carbide tooling is brittle and sensitive to improper handling or excessive runout.