Osg 4700100 Cobalt Square End Mill 0.5 in 4-flute

Product Description

The OSG 4700100 is a 4-flute cobalt square end mill designed for roughing and finishing operations in a single tool. Built in the OSG Series 470, it features a 30-degree helix angle and a chipbreaker geometry that breaks up chips during aggressive cuts, reducing heat buildup and extending tool life. The 0.5-inch diameter with a matching 0.5-inch shank fits standard collets and end mill holders without adapters. With a 1.25-inch length of cut and 3.25-inch overall length, it handles typical milling depths in ferrous and stainless materials where cobalt-grade tooling is specified. Machinists and tool-and-die professionals select this geometry for jobs that move from roughing to finishing without a tool change.

This end mill is suited for milling steel, stainless steel, cast iron, and other tough alloys where high-speed steel would wear prematurely. The chipbreaker flute design makes it effective in conventional milling setups and CNC machining centers running moderate to aggressive feeds. It is a single-end tool, meaning it is not reversible. The uncoated cobalt construction allows resharpening, which extends service life in high-volume shops. Typical applications include slotting, peripheral milling, and step milling in job shop and production environments.

Key Features

• Cobalt construction for improved heat and wear resistance over standard HSS
• 4-flute chipbreaker design handles roughing and finishing in one pass
• 30-degree helix angle promotes smooth chip evacuation and reduced cutting force
• Uncoated finish allows resharpening to extend tool life
• Single-end square profile for flat-bottom slots, shoulders, and step features
• Series 470 geometry: 0.5-inch diameter, 0.5-inch shank, 1.25-inch LOC, 3.25-inch OAL

Compatibility

Designed for use in standard 0.5-inch collet chucks, end mill holders, and Weldon-style holders on manual mills and CNC machining centers. No specific OEM system compatibility was stated in the product data.

Installation Notes

Install in a clean, dry end mill holder and torque to the holder manufacturer specification. Ensure runout is within acceptable limits before cutting to avoid premature edge chipping. When transitioning from roughing to finishing passes, inspect the chipbreaker flutes for built-up edge, especially in stainless or high-alloy steels. This is a single-end tool and should not be reversed in the holder.