Accupro 313044 Corner Radius End Mill 1/4 in Solid Carbide

Product Description

The ACCUPRO 313044 is a solid carbide corner radius end mill designed for precise milling operations requiring a radiused corner profile. With a 0.250 inch mill diameter and a 0.015 inch corner radius, this tool produces smooth, burr-resistant edges on a wide range of workpiece materials. The 2-flute, right-hand spiral flute geometry combined with a 45-degree helix angle promotes efficient chip evacuation and reduces cutting forces. A ZrN (zirconium nitride) coating improves surface hardness and wear resistance, extending tool life in demanding applications. Licensed machinists and toolroom operators install this end mill in CNC machining centers and manual knee mills.

This end mill is suited for finishing and light roughing passes in ferrous and non-ferrous materials where a radiused corner is required to reduce stress concentrations or meet part drawing callouts. The 3/4 inch length of cut and 2-1/2 inch overall length make it a standard reach tool for most shallow-to-medium pocket depths. Its centercutting design allows plunge entry without a pre-drilled pilot hole, adding flexibility in multi-operation setups. The 1/4 inch shank diameter fits standard ER collet chucks, set-screw holders, and shrink-fit tooling.

Key Features

• Solid micrograin carbide substrate for rigidity and edge retention
• ZrN coating increases surface hardness and reduces built-up edge
• 45-degree helix angle promotes smooth cutting action and chip flow
• 0.015 inch corner radius reduces corner chipping and stress risers on finished parts
• Centercutting geometry permits direct plunge milling without pilot drilling
• Right-hand cut, right-hand flute, single-end configuration

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for 1/4 inch straight-shank toolholders including ER collet systems, set-screw end mill holders, and shrink-fit chucks used in CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer torque and runout specifications. Ensure the shank is clean and free of chips or burrs before seating in the holder, and verify runout with a dial indicator before cutting. Confirm spindle direction is set to right-hand rotation before engaging the cut. Follow applicable shop safety procedures and machine guarding requirements during setup and operation.