Hertel 84512136 Roughing End Mill 1/4 in 4 Flute Cobalt

Product Description

The HERTEL 84512136 is a single-end cobalt roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel and finished with a Titanium Nitride (TiN) coating, this end mill handles tough ferrous and non-ferrous materials with reduced heat buildup and improved wear resistance. The 1/4 inch cutting diameter pairs with a 3/8 inch shank, providing rigidity in standard end mill holders. With 4 right-hand flutes and a center-cutting design, it enters material directly and evacuates chips efficiently during roughing passes. Machinists and tool-and-die professionals use this tool on manual mills and CNC machining centers.

This end mill is suited for roughing operations in job shops, production machining, and maintenance environments. The 1/4 inch length of cut and 2-1/16 inch overall length make it appropriate for shallow-pocket roughing and slot milling in steel, stainless, cast iron, and similar materials. The TiN coating extends tool life compared to uncoated HSS tooling, and the right-hand cutting direction suits standard spindle rotation on vertical milling machines and machining centers.

Key Features

• M42 cobalt HSS construction for heat and wear resistance in tough materials
• Titanium Nitride (TiN) coating extends tool life and reduces friction
• Center-cutting design allows direct plunge entry into workpiece
• 4 right-hand flutes with right-hand flute direction for efficient chip evacuation
• 3/8 inch shank diameter fits standard end mill holders and collet chucks
• Single-end configuration for dedicated roughing applications

Compatibility

Designed as an OEM-style roughing end mill for use in standard end mill holders and collet chucks accepting a 3/8 inch shank diameter on vertical milling machines and CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist following standard toolholding procedures. Ensure the machine spindle is fully stopped and locked out before mounting or removing the end mill. Seat the shank to the minimum recommended insertion depth in the holder to prevent tool pullout under cutting loads. Verify tool runout with a dial indicator before beginning cuts, as excessive runout accelerates edge wear and reduces surface finish quality.