Hertel 84511344 Roughing End Mill 9/32 in 3 Flute Cobalt

Product Description

The HERTEL 84511344 is a single-end roughing end mill designed for aggressive material removal in milling operations. Manufactured from M42 cobalt high-speed steel, this tool handles tough ferrous and non-ferrous materials where standard HSS tooling wears prematurely. The 9/32 inch (0.2813 inch) cutting diameter, coarse pitch flute geometry, and bright uncoated finish make it well suited for roughing passes where chip evacuation and tool life under heat are the priority. Three right-hand flutes with right-hand cutting direction produce the chip-breaking action that defines the roughing style. Installed by machinists and tool-and-die professionals in manual or CNC milling equipment.

This end mill is used in job shop, maintenance machining, and production environments where a small-diameter roughing tool is needed to remove stock quickly before a finishing pass. The 3/4 inch length of cut and 3/8 inch shank diameter suit it to standard ER or side-lock tool holders commonly found on vertical mills and machining centers. It is not center-cutting, so it is not intended for direct plunge entry. Typical applications include slotting, peripheral roughing, and step milling in steel, cast iron, and similar workpiece materials.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard M2 HSS
• Coarse pitch roughing geometry breaks chips and reduces cutting forces on heavy passes
• Bright uncoated finish — no coating buildup to affect dimensional accuracy on small-diameter tools
• 3 right-hand flutes with right-hand cutting direction
• Non-center-cutting single end — designed for peripheral and slot roughing, not plunge cutting
• 3/8 inch shank fits standard collet and end mill holders without adapters

Compatibility

Designed as an OEM-style roughing end mill for use in standard 3/8 inch collet chucks, side-lock holders, and Weldon-flat end mill holders on vertical milling machines and CNC machining centers.

Installation Notes

This tool is installed by machinists in standard end mill or collet holders — ensure the holder bore matches the 3/8 inch shank diameter before mounting. De-energize and lock out the spindle drive before changing tooling. Because this is a non-center-cutting end mill, do not use it for plunge milling; ramp or helical entry paths are required when entering a closed pocket. Inspect shank and flutes for chips or damage before each use, and confirm runout with a dial indicator when tight tolerances are required.