Accupro 12181342 Corner Radius End Mill 1/4 in 2 Flute

Product Description

The ACCUPRO 12181342 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 1/4 inch diameter with a 0.045 inch corner radius, delivering smooth, consistent edge transitions on profiled cuts. The TiCN coating increases surface hardness and lubricity, extending tool life in demanding applications. With a 40-degree helix angle and right-hand spiral flute geometry, this end mill promotes efficient chip evacuation and reduces heat buildup at the cutting zone. It is centercutting, allowing plunge entry. Machinists and toolroom operators use this end mill in manual and CNC milling setups where corner radius accuracy is critical.

This end mill is suited for finish milling, slotting, and profiling operations requiring a controlled corner radius. The 3/4 inch length of cut accommodates shallow-to-medium depth passes, while the 2-1/2 inch overall length provides adequate clearance in most standard milling setups. Micrograin carbide construction supports use in hardened steels, stainless, cast iron, and high-temp alloys where tool rigidity and edge retention are required. Single-end configuration means the tool is replaced when worn rather than reversed.

Key Features

• 0.045 inch corner radius with a tolerance of plus or minus 0.0015 inches for consistent edge geometry
• TiCN coating for improved wear resistance and reduced friction on hard materials
• 40-degree helix angle promotes aggressive chip evacuation and reduced cutting forces
• Centercutting design allows direct plunge entry without pre-drilling
• Micrograin solid carbide substrate for rigidity and edge retention at elevated cutting speeds
• Right-hand flute direction and right-hand cutting geometry for standard milling spindles

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for 1/4 inch collets and end mill holders used in standard CNC and manual vertical milling machines.

Installation Notes

Installation should be performed by a qualified machinist familiar with toolholder runout specifications and proper torque procedures for collet systems. Ensure the spindle and toolholder are fully de-energized and the machine is in a safe lockout state before changing tooling. Verify collet bore cleanliness and confirm shank seating depth meets the toolholder manufacturer guidelines before securing. Do not exceed the tool manufacturer recommended cutting parameters for the workpiece material.