Accupro 12180726 Square End Mill 5/16 in 5 Flute Solid Carbide

Product Description

The ACCUPRO 12180726 is a single-end square end mill designed for precision milling in ferrous and non-ferrous materials. Built from micrograin solid carbide and coated with AlTiN (aluminum titanium nitride), it handles elevated cutting temperatures and abrasive workpiece materials. The 5-flute geometry with a 40-degree helix and variable index spacing improves chip evacuation and reduces chatter at higher feed rates. With a 5/16 inch cutting diameter and 3/4 inch length of cut, this end mill suits slotting, profiling, and finishing passes in shallow-to-moderate depth applications. Centercutting capability allows direct plunge entry without pre-drilling.

This end mill is suited for job shop and production machining environments where tight tolerances and surface finish matter. It is sized for CNC machining centers, knee mills, and manual mills with R8 or collet toolholding systems that accept a 5/16 inch shank. Common applications include contouring, pocketing, and side milling on steel, stainless, cast iron, and hardened alloys. The AlTiN coating extends tool life in dry or minimal-coolant cutting strategies common in high-speed machining setups.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance
• AlTiN coating for high-temperature and abrasion-resistant cutting performance
• 5-flute, 40-degree spiral helix with variable index for reduced vibration
• Centercutting design allows direct plunge entry
• Right-hand cut and right-hand flute for standard CNC spindle compatibility
• Mill diameter tolerance of +0.000 / -0.002 inches for close-tolerance work

Compatibility

Designed as an OEM-style solid carbide square end mill suitable for CNC machining centers and manual mills with toolholding that accepts a 5/16 inch shank diameter.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the spindle and toolholder are fully de-energized and the machine is in an e-stop or locked-out state before changing tooling. Seat the shank fully in the collet or end mill holder and torque the retention mechanism to the toolholder manufacturer specification. Verify runout with a dial indicator after seating; excessive runout will accelerate tool wear and degrade surface finish.