Accupro 12182950 Corner Radius End Mill 1/2 in 4 Flute

Product Description

The ACCUPRO 12182950 is a solid carbide corner radius end mill designed for precision milling in ferrous and hardened materials. Built from micrograin carbide and coated with AlTiN (aluminum titanium nitride), it handles high-temperature cutting conditions where HSS or uncoated carbide tools fall short. The 0.02-inch corner radius reduces stress concentration at the cutting edge and produces a controlled radius blend at part corners rather than a sharp 90-degree break. With 4 flutes, a 40-degree helix angle, and a right-hand cutting direction, it delivers smooth chip evacuation and surface finish in standard CNC machining center applications. Machinists and toolroom operators use this end mill for profiling, slotting, and finishing passes.

This end mill is suited for vertical and horizontal machining centers running steel, stainless steel, cast iron, titanium, and similar hard or abrasive workpiece materials where AlTiN coating provides the thermal barrier needed for productive tool life. The stub-length design and 5/8-inch length of cut (LOC) make it appropriate for shorter-reach applications where rigidity is a priority over depth. The centercutting geometry allows plunge entry in addition to peripheral and slot milling operations. Single-end configuration means the tool is replaced, not reversed, at end of life.

Key Features

• AlTiN coating provides oxidation resistance and hardness at elevated cutting temperatures
• Micrograin solid carbide substrate offers superior wear resistance compared to standard carbide grades
• 0.02-inch corner radius reduces chipping at part corners and extends tool life in interrupted cuts
• 40-degree helix angle promotes smooth chip flow and reduces cutting forces
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Right-hand flute direction and right-hand cutting for standard CNC spindle rotation

Compatibility

Designed as an OEM-style replacement or standard tooling selection for CNC machining centers and manual mills using a 1/2-inch collet, end mill holder, or shrink-fit toolholder with 1/2-inch bore capacity.

Installation Notes

Installation is performed by a machinist or toolroom technician using an appropriate tool holder torqued per the holder manufacturer's specification. Always ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Verify runout at the tool tip after seating to confirm proper holder engagement. Follow your facility's tooling management and cutting parameter standards for AlTiN-coated carbide end mills when setting speeds and feeds.