Accupro 310109 Square End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The ACCUPRO 310109 is a 4-flute, single-end square end mill designed for precision milling in ferrous and non-ferrous materials. Built from micrograin solid carbide, it delivers the rigidity and wear resistance required in demanding cutting environments. The tool features a 1/4 inch diameter cutting edge, a 3/4 inch length of cut, and a 38-degree helix angle that promotes efficient chip evacuation and reduces cutting forces. An AlTiCrN coating provides thermal and oxidation resistance, extending tool life in high-speed and dry-cutting applications. This end mill suits machinists, toolmakers, and CNC operators running production or prototype work.

The 310109 is suited for slotting, peripheral milling, and profiling operations on machining centers and CNC mills. The 1/4 inch shank diameter fits standard ER collets and end mill holders common in both vertical and horizontal setups. The variable index geometry helps reduce harmonic vibration during extended cuts. At 2.5 inches overall length, it works well in close-clearance setups where longer-reach tooling is not required. Right-hand flute direction and right-hand cutting orientation are standard for conventional spindle rotation.

Key Features

• Micrograin solid carbide construction for superior hardness and edge retention
• AlTiCrN coating provides high thermal resistance for dry and high-speed cutting
• 38-degree helix angle promotes smooth chip flow and reduces cutting pressure
• Variable index flute spacing minimizes chatter and vibration
• Center-cutting capable, allowing plunge entry into workpiece
• Single-end design with right-hand cut and right-hand spiral

Compatibility

Designed for use with standard 1/4 inch diameter end mill holders, ER collet chucks, and shrink-fit tooling systems on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down or placed in an e-stop state before changing tooling. Verify that the shank is fully seated in the holder to the recommended grip length before torquing the retention mechanism. Inspect the cutting edges for chips or damage before use, and confirm runout with a dial indicator when precision tolerances are required.