Accupro 14788378 Square End Mill 5/16 Inch 2 Flute Carbide

Product Description

The ACCUPRO 14788378 is a solid carbide square end mill engineered for precision milling in metal fabrication and machining applications. With a 5/16 inch (0.3130 inch) mill diameter and a 1 inch length of cut, this centercutting tool removes material on both its periphery and its face, allowing plunge cuts directly into workpieces. The two-flute helical geometry promotes efficient chip evacuation and reduces cutting forces, making it well suited for slotting, profiling, and peripheral milling operations. Solid carbide construction delivers the rigidity and wear resistance needed for ferrous and non-ferrous materials at elevated cutting speeds. Overall length is 4 inches with a 5/16 inch cylindrical shank.

This end mill is used in CNC machining centers, manual knee mills, and toolroom milling machines across job shops, production facilities, and maintenance departments. The 5/16 inch shank seats directly into standard ER or straight-bore collets. The centercutting design makes it practical for operations where the cutter must enter the workpiece axially before moving laterally. Machinists and tool-and-die technicians working in steel, aluminum, brass, and plastics will find the two-flute configuration beneficial when chip clearance is a priority over surface finish.

Key Features

• Solid carbide construction for high rigidity and extended tool life
• Centercutting capable — supports direct plunge entry into workpieces
• Two helical flutes for efficient chip evacuation during slotting and profiling
• 5/16 inch mill diameter with matching 5/16 inch cylindrical shank
• 1 inch length of cut provides adequate depth for most standard slotting operations
• 4 inch overall length fits standard collet and chuck setups without extended-reach toolholders

Compatibility

Designed as an OEM-style replacement end mill compatible with standard ER collet systems and straight-bore toolholders accepting a 5/16 inch cylindrical shank.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the power is locked out before seating or removing the end mill from the collet or chuck. Clean the shank and collet bore before assembly to prevent runout caused by chips or coolant residue. Confirm collet nut torque meets the toolholder manufacturer specification before beginning any cut.