Accupro 312666 Square End Mill 5/8 in 7 Flute Carbide

Product Description

The ACCUPRO 312666 is a solid carbide square end mill designed for high-performance milling in metalworking applications. It features a 5/8 inch (0.625 inch) cutting diameter with seven flutes and a 3/4 inch length of cut. The 38-degree right-hand helix promotes efficient chip evacuation and smooth cutting action. An AlTiCrN coating provides thermal resistance and extended tool life under high-speed cutting conditions. The micrograin carbide substrate delivers the hardness and edge retention required for demanding ferrous and non-ferrous materials. This tool is a single-end design with a 5/8 inch shank diameter and 3 inch overall length.

The 312666 is suited for finishing and semi-finishing passes in ferrous alloys, stainless steels, and hardened materials where heat generation is a concern. The AlTiCrN coating performs particularly well in dry or minimal-lubrication cutting environments. It is installed in milling machines, machining centers, and CNC mills by machinists and toolroom professionals. The seven-flute geometry increases the number of cutting edges in contact with the workpiece, supporting higher feed rates at controlled depths of cut.

Key Features

• 5/8 inch cutting diameter with 7-flute geometry for high feed rate capability
• AlTiCrN coating for thermal and oxidation resistance in high-speed applications
• 38-degree right-hand helix for efficient chip evacuation
• Micrograin solid carbide substrate for hardness and edge stability
• 3/4 inch length of cut suited for moderate-depth profiling and slotting
• Single-end design with matched 5/8 inch shank diameter for secure tool holding

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers and manual milling machines accepting a 5/8 inch straight shank end mill holder or collet.

Installation Notes

Installation should be performed by a qualified machinist following safe toolchanging procedures. Ensure the spindle is fully stopped and the machine is in a locked or e-stop state before changing tooling. Seat the shank fully in the collet or end mill holder and tighten to the tool holder manufacturer's specified retention method. Verify runout with a dial indicator before beginning a cut, particularly given the seven-flute geometry where runout amplifies chip load imbalance.