Osg 8555880 Square End Mill 0.315in 4 Flute Solid Carbide

Product Description

The OSG 8555880 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. With a 0.315-inch (8 mm) cutting diameter and 4 straight flutes, this tool delivers clean, flat-bottomed cuts in a right-hand cutting direction. Built from micrograin solid carbide and finished with a Duarise coating, the 8555880 is engineered for durability and consistent edge retention in demanding cutting environments. Center-cutting capability allows for direct plunge entry. Variable helix and variable index geometry help reduce chatter and improve surface finish. This tool suits machinists and tool-and-die professionals working with tight tolerances.

The OSG 8555880 is well suited for general-purpose end milling in job shops, production machining cells, and tool rooms. Its regular-length profile and straight flute geometry make it effective for slotting, profiling, and peripheral milling in ferrous and non-ferrous materials. The Series 8205 designation places it within OSG's line of solid carbide straight-flute end mills intended for precision applications where runout control and consistent chip evacuation are required.

Key Features

• 0.315-inch (8 mm) cutting diameter with mill diameter tolerance of +0.00 / -0.02 mm for tight fitment
• 4-flute straight flute configuration for slotting and profiling operations
• Micrograin solid carbide construction for extended tool life and edge retention
• Duarise coating reduces friction and improves wear resistance at the cutting edge
• Variable helix and variable index geometry minimize vibration and chatter
• Center-cutting design permits direct plunge cutting without a pre-drilled pilot hole

Compatibility

Designed as a Series 8205 solid carbide square end mill compatible with standard 0.315-inch (8 mm) shank tool holders used in CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's tooling guidelines. Ensure the spindle is fully stopped and the machine is powered off before changing tooling. Secure the shank fully within the tool holder to the recommended grip length and verify runout with a dial indicator before beginning a cut. Consult the machine manufacturer's documentation for appropriate feed rates and speeds based on workpiece material.