Hertel 62851860 Roughing End Mill 7/8 in 5 Flute Cobalt

Product Description

The HERTEL 62851860 is a single-end roughing end mill designed for aggressive material removal in milling operations. Manufactured from M42 cobalt high-speed steel and coated with Titanium Nitride (TiN), it delivers elevated heat and wear resistance compared to standard HSS tooling. The cutter measures 7/8 inch (0.8750 inch) in diameter with a 3/4 inch (0.7500 inch) shank, a 1-7/8 inch (1.8750 inch) length of cut, and a 4-1/8 inch (4.1250 inch) overall length. With 5 coarse-pitch spiral flutes and right-hand cutting and flute direction, this end mill is suited for high-feed roughing passes where chip clearance and tool life are the primary concerns. Licensed machinists and CNC operators install this tooling in vertical and horizontal milling machines.

The 62851860 is built for roughing applications in ferrous and non-ferrous metals where stock removal rate takes priority over finish quality. The coarse pitch geometry and center-cutting capability allow plunge entry and peripheral cuts without requiring a pre-drilled start hole. It is appropriate for use in general machining environments, tool rooms, and production shops running steel, stainless, cast iron, and similar alloys. The TiN coating extends tool life in higher-speed cuts where uncoated cobalt would wear prematurely.

Key Features

• M42 cobalt HSS construction for improved red hardness and wear resistance over standard M2 HSS
• Titanium Nitride (TiN) coating reduces friction and extends tool life at elevated surface speeds
• 5 coarse-pitch spiral flutes provide efficient chip evacuation during heavy roughing cuts
• Center-cutting design allows direct plunge entry into workpiece material
• Right-hand cut, right-hand flute, single-end configuration for standard milling spindles
• 3/4 inch shank diameter fits common ER and side-lock toolholders

Compatibility

Designed as an OEM-style replacement or standard tooling option for vertical and horizontal milling machines accepting a 3/4 inch shank end mill holder.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine in a full stop, powered-off state before inserting or removing tooling. The shank must be fully seated in the toolholder to the minimum engagement depth recommended by the holder manufacturer. Confirm runout with a dial indicator before initiating a cut. Follow applicable machine safety standards and shop PPE requirements when handling and operating rotary cutting tools.