Accupro 312075 Corner Radius End Mill 1/4 in 5 Flute

Product Description

The ACCUPRO 312075 is a solid carbide corner radius end mill designed for precision milling in demanding cutting applications. Built from micrograin solid carbide and coated with AlCrTiN for heat and wear resistance, this tool delivers consistent performance in hardened and abrasive materials. It features a 1/4 inch mill diameter, a 3/8 inch length of cut, and a 4 inch overall length. The 5-flute, right-hand spiral geometry with a 38-degree helix and variable index promotes smooth chip evacuation and reduces chatter. Centercutting capability allows plunge entry, adding flexibility across a range of milling operations.

This end mill is suited for use in vertical machining centers and CNC milling setups where extended reach is required. The extended reach design with a 3/4 inch reach length and reduced neck diameter of 0.237 inches allows access to deep pockets and profiled features without interference. The 0.010 inch corner radius protects the cutting edge and reduces stress concentrations at the tool tip, making it appropriate for finishing passes on molds, dies, and precision components in both job shop and production environments.

Key Features

• AlCrTiN coating for elevated heat resistance and extended tool life in hard and abrasive materials
• Micrograin solid carbide substrate for rigidity and edge retention
• 5-flute variable index design reduces vibration and improves surface finish
• 0.010 inch corner radius protects cutting edge and reduces tip chipping
• Extended reach with 3/4 inch reach length and reduced neck for deep-pocket access
• Centercutting construction allows direct plunge milling

Compatibility

Designed as an OEM-style replacement or direct-use tool for standard 1/4 inch collet or end mill holders on CNC vertical machining centers and manual mills equipped with appropriate tooling systems.

Installation Notes

Installation should be performed by a qualified machinist or toolroom professional. Ensure the spindle is fully stopped and locked out before mounting or removing the end mill. Seat the shank fully and evenly in a clean, undamaged collet or end mill holder and torque the retention nut to the machine or toolholder manufacturer specification. Inspect the cutting edges for chips or damage before each use and do not exceed the recommended depth of cut for the tool diameter and workpiece material.