Accupro 12182832 Corner Radius End Mill 5/16in 4 Flute Carbide

Product Description

The ACCUPRO 12182832 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining applications. It features a 5/16 inch diameter with a 0.015 inch corner radius and a 1/2 inch length of cut, making it well suited for generating smooth, radiused bottom corners in pockets, slots, and contoured surfaces. The 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces. With a micrograin carbide substrate and bright/uncoated finish, this end mill is appropriate for a range of ferrous and non-ferrous materials. Licensed machinists and CNC operators working in job shops, tool rooms, and production environments are the primary users of this tooling.

This end mill fits stub-length applications where rigidity is prioritized over reach. It is a single-end, centercutting design, meaning it can plunge directly into the workpiece as well as perform standard peripheral and slot milling. The right-hand cutting direction and right-hand flute spiral are standard for conventional CNC milling setups. The 5/16 inch shank diameter matches the tool diameter, allowing use in standard collet chucks, end mill holders, or shrink-fit toolholders sized for 5/16 inch shanks.

Key Features

• 0.015 inch corner radius reduces stress concentrations and improves surface finish at pocket floors
• Solid micrograin carbide construction provides hardness and wear resistance across a range of materials
• 40-degree helix angle promotes efficient chip evacuation in slotting and peripheral milling
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Bright/uncoated finish suitable for use with cutting fluids in general-purpose machining
• Right-hand cut and right-hand spiral flute configuration compatible with standard CNC spindle rotation

Compatibility

Designed as an OEM-style replacement or direct-use corner radius end mill for CNC machining centers and manual mills equipped with standard 5/16 inch collet or end mill holder systems.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the holder to the recommended gauge-line depth and torque the retention mechanism according to the toolholder manufacturer specifications. Verify runout with a dial indicator after clamping before beginning a cut.