Accupro 12181769 Square End Mill 5/8 in 2 Flute Carbide Altin

Product Description

The ACCUPRO 12181769 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. It features a 5/8 inch cutting diameter with a 3 inch length of cut and a 6 inch overall length, placing it in the extra-long category for reaching deep pockets and slots. The tool runs a 2-flute spiral configuration with a 40-degree helix angle and an AlTiN (aluminum titanium nitride) coating, which improves heat resistance and tool life in ferrous and hardened materials. Micrograin carbide construction provides edge stability under high-feed conditions. This end mill is centercutting, allowing plunge entry directly into workpiece material.

This end mill suits machinists and toolroom operators working on CNC machining centers and manual mills. The extra-long reach makes it well suited for deep-cavity milling, side-wall profiling, and contour work where standard-length tools cannot reach. Right-hand cut and right-hand flute geometry follow conventional spindle direction for most vertical and horizontal machining centers. The AlTiN finish performs well in dry or minimal-lubrication cutting environments, particularly in alloy steels, stainless, and cast iron.

Key Features

• 5/8 inch cutting diameter with plus 0.000 / minus 0.002 inch diameter tolerance
• 3 inch length of cut for deep pocket and side-wall milling
• Solid micrograin carbide construction for edge retention and rigidity
• AlTiN coating for elevated heat resistance in ferrous materials
• 40-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Centercutting geometry allows direct plunge entry without pre-drilling
• Right-hand cut, right-hand flute — compatible with standard CNC spindle rotation

Compatibility

Designed for use in standard CNC machining centers and manual mills accepting a 5/8 inch straight shank, with shank diameter tolerance of minus 0.0001 to minus 0.0004 inch for consistent toolholder fit.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the shank fully into a collet chuck or end mill holder to the recommended engagement depth before tightening. Confirm spindle rotation direction matches right-hand cut orientation before engaging the workpiece. Inspect the tool and holder for runout with a dial indicator prior to production cuts to protect edge integrity and part tolerance.