Osg 447-2500 Square End Mill 0.25in 4 Flute Solid Carbide

Product Description

The OSG 447-2500 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. It features a 0.25 inch cutting diameter, a 0.75 inch length of cut, and a 2.5 inch overall length with a 0.25 inch shank diameter. The four-flute geometry with a 30-degree helix angle and left-hand flute direction promotes efficient chip evacuation while supporting right-hand cutting. Micrograin carbide construction delivers hardness and wear resistance suited to demanding cuts in ferrous and non-ferrous materials. This end mill is centercutting, allowing plunge entry directly into the workpiece without a pre-drilled pilot hole.

The 447-2500 is used in CNC machining centers, manual knee mills, and toolroom applications where close-tolerance slot milling, profiling, and peripheral cutting are required. Its regular length classification and spiral flute design make it a general-purpose workhorse for shops running steel, aluminum, stainless, and similar materials. Machinists and toolroom operators handling production or prototype work will find the four-flute configuration appropriate for finishing passes and medium-load roughing on rigid setups.

Key Features

• Solid micrograin carbide construction for extended tool life in hard materials
• Four flutes with 30-degree helix angle for balanced chip load and surface finish
• Centercutting geometry allows direct plunge milling without pilot drilling
• Left-hand flute with right-hand cut reduces chatter tendency in certain setups
• Uncoated finish suitable for use with coolant or cutting fluid as-needed
• Regular length classification for maximum rigidity in standard-depth applications

Compatibility

Designed as an OEM-style tooling solution for standard 0.25 inch collets and tool holders used in CNC machining centers and manual mills accepting 0.25 inch shank diameter end mills.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully and evenly in the collet or tool holder to the recommended gauge length to minimize runout. Follow machine manufacturer torque specifications for collet nut tightening, and inspect the cutting edges for chipping before each use.