Osg 402-078111 Square End Mill 5/64 in 2 Flute Solid Carbide

Product Description

The OSG 402-078111 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. Built from micrograin carbide and finished with a TiAlN coating, it delivers extended tool life in ferrous and hardened materials. The 2-flute spiral design with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. At 0.0781 inches (5/64 inch) in diameter with a 1/4 inch length of cut and 1/8 inch shank, this is a small-diameter tool built for fine detail work, slot milling, and profiling in confined areas. It is centercutting capable, allowing direct plunge entry into the workpiece.

This end mill is suited for CNC machining centers and manual mills in job shop, tool and die, and production environments. The right-hand cut and right-hand spiral flute configuration is standard for conventional spindle setups. The regular length profile and 1-1/2 inch overall length keep the tool rigid during small-diameter operations where deflection is a concern. Machinists working with aluminum, steel, stainless, and similar materials will find the TiAlN coating effective for reducing heat buildup at the cutting edge. This is a single-end tool from OSG Series 402.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance in demanding cuts
• TiAlN finish provides thermal resistance and extended edge life in ferrous materials
• 30-degree helix spiral flute promotes chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge milling without a pre-drilled entry hole
• Right-hand cut and right-hand flute for standard CNC and manual mill spindle compatibility
• Regular length at 1-1/2 inches OAL maximizes stiffness for small-diameter precision work

Compatibility

Designed as a standard single-end square end mill for use in CNC machining centers and manual milling machines accepting a 1/8 inch shank via collet or end mill holder.

Installation Notes

Install in a precision collet or end mill holder sized for 1/8 inch shank to ensure concentricity and minimize runout. Confirm spindle is fully stopped and machine is powered down before tool changes. At this diameter, tool runout and feed rate selection are critical — excessive runout or aggressive feed can cause tool breakage. Follow the machine manufacturer and tooling manufacturer guidelines for speeds, feeds, and depth of cut for the specific workpiece material.