Accupro 12183664 Corner Radius End Mill 5/16 in 4 Flute Carbide

Product Description

The ACCUPRO 12183664 is a solid carbide corner radius end mill designed for precision milling operations in metal and hard material applications. Built with a 5/16 inch diameter, a 0.02 inch corner radius, and four right-hand spiral flutes, it delivers smooth cutting action while protecting corner edges from chipping. The extra-long 6 inch overall length and 1-1/2 inch length of cut make it suitable for reaching deeper features and pockets. The bright uncoated finish and micrograin carbide substrate offer a sharp cutting edge right out of the box. Licensed machinists and CNC operators are the primary users of this tooling.

This end mill is suited for CNC machining centers and manual knee mills where controlled corner radii on slots, pockets, and profiling cuts are required. The centercutting geometry allows plunge entry directly into the workpiece. The extra-long reach configuration addresses applications where standard-length tooling cannot access the feature depth. It is commonly used in job shops and production environments machining steel, stainless, aluminum, and similar materials.

Key Features

• 5/16 inch mill diameter with matching 5/16 inch shank for direct collet or chuck mounting
• 0.02 inch corner radius reduces stress concentration and extends part edge life
• 4 right-hand spiral flutes with right-hand cutting direction for standard spindle operation
• Centercutting design allows direct plunge milling without a pre-drilled entry hole
• Extra-long 6 inch OAL provides reach for deep-pocket and extended-reach setups
• Micrograin solid carbide construction maintains edge integrity in demanding cuts

Compatibility

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

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down or in a safe state before changing tooling. Seat the shank fully into the holder and torque the retention mechanism per the toolholder manufacturer's specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates tool wear and degrades surface finish.