Hertel 84512821 Roughing End Mill 1-1/4 in Cobalt Tialn

Product Description

The HERTEL 84512821 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel and coated with TiAlN for heat and wear resistance, this tool handles demanding cuts in ferrous and hard alloy workpiece materials. It features a 1-1/4 inch diameter, 6 flutes with a fine pitch geometry, and a 4-inch length of cut, making it well suited for deep slotting and peripheral roughing passes. The right-hand cutting and right-hand flute direction are standard for conventional milling machine spindles. At 0.504 pounds, this is a solid, full-size tool intended for professional machining environments.

This roughing end mill is used in job shops, production machining cells, and maintenance shops where fast stock removal is the priority. The fine-pitch 6-flute configuration reduces chatter and chip load per flute compared to coarser-pitch designs, allowing higher feed rates on rigid setups. It is a non-centercutting tool, so plunge entry is not recommended. The 1-1/4 inch shank diameter matches the cutting diameter for direct collet or end mill holder mounting.

Key Features

• M42 cobalt construction for elevated hot hardness and wear resistance compared to standard M2 HSS
• TiAlN coating reduces friction and extends tool life in dry or semi-dry cutting conditions
• 6-flute fine-pitch geometry distributes cutting forces and supports higher feed rates
• 4-inch length of cut supports deep pocket and peripheral roughing applications
• Right-hand cut and right-hand helix for use on conventional CNC and manual milling spindles
• Non-centercutting design — ramp or helical entry required, direct plunge not supported

Compatibility

Designed as a standard 1-1/4 inch shank single-end roughing end mill for use in collet chucks, end mill holders, or Weldon-style holders with a 1-1/4 inch bore.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the spindle drive before mounting or removing the tool. Secure the shank fully within the holder to the recommended minimum engagement depth and torque the set screw or collet nut per the holder manufacturer specification. Verify runout with a dial indicator before initiating cuts, as excessive runout will accelerate tool wear and degrade surface finish.