Hertel 62889035 Roughing End Mill 3/8 in 4 Flute Cobalt

Product Description

The HERTEL 62889035 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a TiAlN coating, it handles tough ferrous and stainless alloys where standard HSS tooling falls short. The 3/8 inch diameter, 4-flute coarse-pitch geometry breaks chips quickly and reduces tool deflection during heavy cuts. With a 1.5 inch length of cut and 3.25 inch overall length, this end mill suits general roughing work in manual mills, CNC machining centers, and tool-room applications. Machinists, toolmakers, and CNC operators are the primary users.

This end mill is suited for roughing passes in ferrous metals, stainless steels, and high-temperature alloys in both job-shop and production environments. The right-hand cutting and right-hand spiral flute direction make it compatible with conventional vertical and horizontal milling setups. It is a single-end tool, so it is replaced rather than resharpened for best results in production settings. The centercutting capability allows direct plunge entry without a pre-drilled pilot hole.

Key Features

• M42 cobalt HSS construction for heat and wear resistance in hard materials
• TiAlN coating extends tool life and supports higher surface speeds
• Coarse-pitch roughing geometry for fast stock removal and chip evacuation
• Centercutting design allows direct plunge milling
• 3/8 inch shank diameter matches standard collets and end mill holders
• Right-hand cut and right-hand spiral for standard milling machine spindle direction

Compatibility

Designed as an OEM-style replacement or standard tooling selection for 3/8 inch end mill holders, ER collet chucks, and Weldon-style tool holders used in vertical milling machines and CNC machining centers.

Installation Notes

Installation requires a clean, properly sized collet or end mill holder rated for the 3/8 inch shank diameter. Ensure the machine spindle is fully stopped and locked before inserting or removing the tool. Verify runout with a dial indicator after seating, as excessive runout will accelerate edge wear. Follow the machine manufacturer guidelines for maximum RPM and feed rates appropriate to cobalt tooling and TiAlN coatings.