Accupro 12183501 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12183501 is a solid carbide corner radius end mill designed for precision milling operations in metal fabrication, tool-and-die, and machining environments. It features a 5/16-inch diameter with a 0.045-inch corner radius, reducing stress concentrations at part corners and extending tool life in demanding cuts. The 4-flute, right-hand spiral design provides efficient chip evacuation and a smooth surface finish. With a bright/uncoated finish and micrograin carbide construction, this end mill performs reliably in a range of ferrous and non-ferrous materials. It is a single-end, centercutting tool, meaning it can be used for plunge entry as well as peripheral and slot milling.

This end mill is suited for CNC machining centers and manual mills where long-reach access is required. The 4-inch overall length and 1-inch length of cut make it appropriate for deeper pocket work and profiling operations where a standard-length tool lacks the reach. It is commonly used by machinists, tool-and-die makers, and precision fabricators working in production or job-shop settings. The 5/16-inch shank diameter fits standard ER and straight-bore collet systems commonly found in vertical machining centers.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance
• 0.045-inch corner radius reduces notching and extends part and tool life
• 4-flute right-hand spiral geometry for efficient chip removal and surface finish
• Centercutting design allows direct plunge entry without a pilot hole
• Long-reach 4-inch OAL suits deep pocket and profiling applications
• Bright/uncoated finish compatible with a wide range of workpiece materials

Compatibility

Designed as an OEM-style solid carbide corner radius end mill compatible with standard 5/16-inch straight-bore and ER collet toolholders used in CNC and manual vertical milling machines.

Installation Notes

Installation should be performed by a qualified machinist following standard toolholding procedures. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or toolholder to the recommended gauge-line depth and torque the retention nut per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning a production cut, and confirm cutting parameters are appropriate for the workpiece material and depth of cut.