Hertel 44838498 Roughing End Mill 3/8 in 4 Flute Cobalt

Product Description

The HERTEL 44838498 is a single-end roughing end mill designed for high-material-removal-rate milling operations in tough ferrous and non-ferrous workpiece materials. Built from M42 cobalt high-speed steel with a TiAlN coating, this tool handles interrupted cuts and abrasive materials where standard HSS tooling falls short. The 3/8 inch diameter cutter features four right-hand flutes with a fine pitch geometry that breaks chips aggressively while reducing chatter and heat buildup at the cutting edge. It is intended for use by machinists and tool-and-die professionals running vertical mills, knee mills, and CNC machining centers.

This end mill is suited for roughing passes in steel, alloy steel, stainless steel, and similar hard materials where fast stock removal is the priority before a finishing pass. The 3/4 inch length of cut and 2-1/2 inch overall length make it appropriate for moderate-depth pocketing, slotting, and peripheral milling in production and job-shop environments. The non-centercutting geometry means it is not designed for direct plunge entry; a pre-drilled hole or ramping entry should be used. The right-hand cutting and flute direction is compatible with standard spindle rotation on conventional and CNC milling equipment.

Key Features

• M42 cobalt HSS construction for improved hardness and heat resistance over standard M2 HSS
• TiAlN coating extends tool life in dry or semi-dry cutting conditions at elevated temperatures
• Fine pitch, four-flute roughing geometry breaks chips and reduces cutting forces
• Right-hand cut and right-hand flute direction for standard spindle compatibility
• Single-end design with 3/8 inch shank diameter matching the cutter diameter for straightforward collet or end mill holder setup
• Non-centercutting — requires ramping or pre-drilled entry, not direct plunge

Compatibility

Designed as an OEM-style replacement or direct-procurement roughing end mill compatible with standard 3/8 inch collets, end mill holders, and milling chucks on vertical mills and CNC machining centers.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing the end mill from its holder. Seat the shank fully into the collet or end mill holder and torque the retention mechanism per the holder manufacturer specifications. Because this is a non-centercutting tool, do not program direct axial plunge moves; use a ramping or helical entry toolpath to engage the workpiece.