Hertel 91192146 Roughing End Mill 3/8 in 3 Flute Cobalt

Product Description

The HERTEL 91192146 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers the heat resistance and edge hardness needed for tough ferrous and non-ferrous materials. The 3/8-inch diameter, 3-flute, coarse-pitch geometry breaks chips into smaller segments, reducing cutting forces and heat buildup compared to standard end mills. With a 1.5-inch length of cut and 3.25-inch overall length, this tool suits both manual and CNC milling machines in production and job shop environments. Installation and operation are handled by machinists and toolroom technicians.

This roughing end mill is suited for slotting, peripheral milling, and heavy stock removal passes in ferrous alloys, stainless steel, and similar materials. The right-hand cutting and right-hand flute direction make it compatible with conventional spindle configurations. The coarse pitch and center-cutting capability allow plunge entry where required, adding flexibility to the cutting strategy. It is a practical choice for shops that need an aggressive rougher in a 3/8-inch shank size without moving to carbide tooling.

Key Features

• M42 cobalt HSS construction for elevated heat resistance and tool life in tough materials
• Coarse-pitch, 3-flute design promotes efficient chip evacuation and reduces cutting pressure
• Center-cutting geometry allows direct plunge entry without a pre-drilled pilot hole
• Right-hand cut and right-hand helix for use in standard spindle setups
• Bright, uncoated finish suitable for a wide range of cutting fluids and lubricants
• Single-end configuration with 3/8-inch shank for secure collet or end mill holder retention

Compatibility

Designed as an OEM-style replacement or standard toolroom roughing end mill for use in 3/8-inch collets, end mill holders, or Weldon-style holders on manual knee mills and CNC machining centers.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the holder and torque the retention screw or collet nut according to the holder manufacturer specification. Inspect the cutting edges before use and discard the tool if chipping or excessive wear is observed.