Osg 5227000 Square End Mill 29/64 in 2 Flute Cobalt

Product Description

The OSG 5227000 is a double-end, square-profile cobalt end mill designed for milling operations in ferrous and non-ferrous metals. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance suited to interrupted cuts, harder steels, and abrasive materials where standard HSS tooling falls short. The cutter measures 29/64 inch (0.4531 inch) in diameter with a 13/16 inch (0.8125 inch) length of cut, a 1/2 inch shank diameter, and a 3-3/4 inch overall length. The 30-degree right-hand spiral helix promotes efficient chip evacuation and smooth cutting action. The bright, uncoated finish makes the tool suitable for use with cutting fluid in conventional milling setups.

This end mill fits standard milling applications in job shop, tool room, and production environments. The double-end design provides two usable cutting ends per tool, extending service life and reducing tooling cost per operation. The 2-flute configuration is well suited to slotting and plunge cuts where chip clearance is a priority. It falls within the OSG Series 522 regular-length category, targeting general-purpose material removal in manual and CNC milling machines.

Key Features

• M42 cobalt construction for improved heat resistance over standard M2 HSS
• Double-end design yields two cutting ends per tool
• 30-degree right-hand helix for efficient chip evacuation
• 2-flute geometry supports slotting and plunge milling operations
• Center-cutting capability allows direct plunge entry into workpiece
• Bright/uncoated finish compatible with flood coolant and cutting oils

Compatibility

Designed as a general-purpose replacement end mill for 1/2 inch collet or end mill holders on manual knee mills and CNC machining centers requiring a 29/64 inch diameter, 2-flute square end mill.

Installation Notes

Installation is performed by machinists and tooling technicians using a standard end mill holder or collet chuck sized for a 1/2 inch shank. Ensure the machine spindle is fully stopped and locked before changing tooling. Verify runout with a dial indicator after seating the tool to minimize chatter and premature wear. Follow shop-specific feeds and speeds for cobalt tooling and the workpiece material being machined.