Osg 8555840 Square End Mill 0.1575 in 4 Flute Carbide

Product Description

The OSG 8555840 is a solid carbide square end mill engineered for precision milling in metalworking and machining applications. It features a 0.1575-inch cutting diameter, a 0.2362-inch shank diameter, and four flutes with a straight flute geometry. The Duarise coating provides enhanced wear resistance and surface finish performance. Variable helix and variable index design reduce chatter and improve chip evacuation during cuts. This end mill is centercutting and is ground from micrograin carbide stock for consistent edge integrity. It is installed and operated by machinists and CNC tooling technicians working in job shop, production, and precision manufacturing environments.

The OSG 8555840 is suited for slotting, profiling, and peripheral milling operations on a range of workpiece materials. Its straight flute configuration makes it well matched for applications where controlled chip flow is a priority. The 11-millimeter length of cut and 60-millimeter overall length position it as a standard-reach tool for general-purpose milling tasks. Right-hand cut and right-hand flute direction are consistent with conventional CNC machining center spindle rotation.

Key Features

• Solid micrograin carbide construction for edge consistency and long tool life
• Duarise coating for improved wear resistance and reduced friction
• Variable helix and variable index geometry to minimize vibration and chatter
• Centercutting design enables plunge entry into workpiece material
• Straight flute configuration for controlled chip evacuation
• Four flutes for a balance of chip clearance and surface finish

Compatibility

Designed as an OEM-style replacement or equivalent tooling solution for standard CNC machining center and manual milling machine spindles accepting a 0.2362-inch (6 mm) round shank end mill.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. The shank should be seated in a clean, undamaged collet or end mill holder to the manufacturer-recommended engagement depth before tightening. Verify spindle and toolholder runout before operation to protect edge integrity. Confirm the machine is fully powered down and the spindle is locked before changing tooling.