Hertel 88245469 Roughing End Mill 3/4 in 4 Flute Cobalt

Product Description

The HERTEL 88245469 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a TiCN coating, it handles tough ferrous and non-ferrous materials while maintaining edge integrity under heat and pressure. The 3/4 inch diameter cutter runs 4 fine-pitch flutes in a right-hand cutting and right-hand flute direction, producing a chip-breaking action that reduces chatter and load on the spindle. With a 1.625 inch length of cut and 3.875 inch overall length, this regular-length geometry suits a wide range of vertical and horizontal milling setups. It is centercutting, allowing plunge entry. Machinists and tool-and-die professionals use this type of end mill for roughing passes where stock removal rate matters more than surface finish.

This end mill is suited for shop-floor milling of steel alloys, stainless, and similar materials where cobalt tooling outperforms standard HSS under elevated cutting temperatures. The fine-pitch flute design is particularly effective in moderate to deep slotting, peripheral milling, and pocketing applications on manual knee mills, CNC machining centers, and bridge-port style machines. It fits standard 3/4 inch collets, end mill holders, and Weldon-style side-lock holders without modification.

Key Features

• M42 cobalt construction for elevated heat and wear resistance compared to standard HSS
• TiCN coating reduces friction and extends tool life in ferrous materials
• 4 fine-pitch flutes with right-hand cut and right-hand helix for efficient chip evacuation
• Centercutting design allows direct plunge entry without pre-drilling
• Single-end configuration with regular overall length of 3.875 inches
• 3/4 inch shank diameter matches cutter diameter for direct collet or end mill holder mounting

Compatibility

Designed as a direct-fit replacement for 3/4 inch single-end roughing end mills in standard collet chucks, end mill holders, and Weldon-style side-lock holders accepting a 3/4 inch shank.

Installation Notes

Installation should be performed by a qualified machinist following shop safety protocols. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the full recommended engagement depth in the holder and torque set screws to the holder manufacturer's specification. Verify runout with a dial indicator before beginning the cut, as excessive runout accelerates edge wear on cobalt tooling.