Accupro 12182439 Square End Mill 13/64 in 4 Flute Carbide

Product Description

The ACCUPRO 12182439 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineering plastics. With a 13/64 inch (0.2031 inch) cutting diameter and 4 spiral flutes ground at a 40-degree helix angle, this tool delivers efficient chip evacuation and smooth cutting action in a wide range of materials. The micrograin carbide substrate provides the hardness and wear resistance required for demanding production environments. It is a centercutting design, allowing plunge entry directly into the workpart. Machinists and tool-and-die professionals working on CNC machining centers and manual mills will find this tool suited to slotting, profiling, and peripheral milling tasks.

This end mill is sized for lighter finish work and tight-tolerance detail cuts where a smaller diameter tool is required. The 1/4 inch shank fits standard ER collet chucks, end mill holders, and Weldon-style holders commonly found in job shops and production machining environments. The regular-length body with a 5/8 inch length of cut suits applications where reach is not a primary constraint. Its uncoated finish makes it appropriate for non-ferrous metals such as aluminum and brass, as well as certain steels where a coated tool is not specified.

Key Features

• Solid micrograin carbide construction for hardness and edge retention
• 4-flute spiral design with 40-degree helix angle for efficient chip evacuation
• Centercutting geometry allows direct plunge milling without pre-drilling
• Right-hand cut and right-hand flute — compatible with standard CNC spindle rotation
• Uncoated finish suited to non-ferrous materials and general-purpose milling
• Tight diameter tolerances: +0.000 / -0.002 inches on cutting diameter; -0.0001 / -0.0004 inches on shank

Compatibility

Designed as an OEM-style replacement and standard tooling option for 1/4 inch straight-shank end mill holders, ER collet chucks, and similar toolholding systems used on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist following standard toolholding procedures. Ensure the machine spindle is fully stopped and the tool changer or drawbar is disengaged before inserting or removing the end mill. Seat the shank to the recommended insertion depth for the holder type in use — insufficient engagement reduces rigidity and can cause tool pull-out. Verify runout at the cutting diameter after clamping before beginning a cut.