Accupro 12178596 Square End Mill 5/16 in 3 Flute Carbide

Product Description

The ACCUPRO 12178596 is a solid carbide square end mill designed for precision milling operations in metal, composites, and hard materials. It features a 5/16-inch cutting diameter, a 1-1/4-inch length of cut, and a 4-inch overall length. The three-flute geometry paired with a 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes at higher feed rates. The micrograin carbide construction delivers rigidity and wear resistance suited to demanding cutting environments. This end mill is installed and used by machinists, tool-and-die makers, and CNC operators working in job shops and production environments.

This end mill is well suited to slotting, profiling, and peripheral milling in both conventional and climb-milling applications. The long-length configuration with a 1-1/4-inch length of cut supports deeper axial engagement where standard-length tools fall short. The right-hand cut and right-hand spiral flute orientation make it compatible with standard CNC machining center spindles. The centercutting capability allows direct plunge entry into a workpiece without a pre-drilled hole, adding flexibility to programming strategies.

Key Features

• Solid micrograin carbide construction for extended tool life in hard and abrasive materials
• 5/16-inch cutting diameter with a matched 5/16-inch shank for direct collet or end mill holder mounting
• 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Centercutting design allows plunge milling without a pilot hole
• Three-flute geometry balances chip clearance with core strength at this diameter
• Uncoated finish suitable for use with cutting fluids or in applications where coating is not required

Compatibility

Designed as an OEM-style replacement or direct-application solid carbide square end mill for use in standard CNC machining centers and manual mills accepting a 5/16-inch straight shank via collet, end mill holder, or shrink-fit tooling.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and locked out before mounting or removing the tool. Seat the shank fully and evenly in the holder to the minimum recommended grip depth before torquing the retention mechanism according to the holder manufacturer specifications. Inspect the cutting edges for chips or damage before each use, and verify runout with a dial indicator after mounting.