Osg 70401316 Square End Mill 5/16 Inch 4 Flute Carbide

Product Description

The OSG 70401316 is a solid carbide square end mill designed for precision metal removal in milling operations. It features a 5/16-inch cutting diameter, a 13/16-inch length of cut, and a 4-flute spiral configuration with a 30-degree helix angle. The diamond finish coating promotes chip evacuation and surface finish quality. Built from micrograin solid carbide, this tool delivers the rigidity and wear resistance required for ferrous and non-ferrous machining. It is center-cutting, allowing direct plunge entry into workpiece material without a pre-drilled hole. Right-hand cut and right-hand flute geometry follow standard milling convention. Machinists and CNC operators in production and job-shop environments rely on this tool for slotting, profiling, and peripheral milling passes.

This end mill is suited for use in CNC machining centers, knee mills, and manual milling machines where a 5/16-inch shank and regular-length reach are appropriate. The 2-1/2-inch overall length and 13/16-inch length of cut place it in the standard length category, making it well-matched for general-purpose cavity work, contouring, and shoulder milling at moderate depths. It is part of the OSG Series 7040 product line, which targets high-performance cutting in common shop alloys. No extended reach is incorporated, keeping the tool rigid during aggressive feed rates.

Key Features

• 5/16-inch cutting diameter with a mill diameter tolerance of +0.000 / -0.002 inches for tight dimensional control
• 4-flute spiral design with a 30-degree helix angle for efficient chip flow
• Micrograin solid carbide construction for hardness and thermal stability
• Diamond finish surface treatment to reduce friction and improve edge life
• Center-cutting geometry allows direct plunge milling without pilot hole
• Right-hand cut and right-hand flute configuration matches standard spindle rotation

Compatibility

Designed as an OEM-style replacement and standard fitment for milling applications requiring a 5/16-inch diameter, 5/16-inch shank, 4-flute solid carbide square end mill in regular length. Part of the OSG Series 7040.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Verify spindle rotation direction matches the right-hand cut orientation of this tool before engaging the workpiece. Secure the shank fully within the tool holder to the recommended grip length and confirm runout with a dial indicator before beginning cuts. Follow all machine guarding and PPE requirements per applicable shop safety standards.