Hertel 91197293 Roughing End Mill 1-1/2 in 6 Flute Cobalt

Product Description

The HERTEL 91197293 is a single-end roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel with a bright, uncoated finish, this tool handles interrupted cuts and tough ferrous materials where standard HSS tooling falls short. The 1.5-inch diameter cutter runs 6 fine-pitch flutes in a right-hand cutting and right-hand flute direction, providing the chip-clearing geometry roughing operations demand. With a 6-inch length of cut and 8.5-inch overall length, this end mill suits deep-pocket and long-reach roughing passes. Machinists and tool-and-die professionals specify this configuration for production roughing on knee mills, bed mills, and CNC machining centers.

This end mill is suited for roughing applications in ferrous metals, alloy steels, and similar materials where cobalt tooling is the standard choice. The 1.25-inch shank diameter fits standard ER or side-lock holders commonly found on vertical machining centers and manual knee mills. The fine-pitch flute geometry reduces chatter at higher chip loads, making it a practical choice for production shops running extended roughing cycles. It is a non-center-cutting design, so it requires a pre-drilled entry point or ramp entry programming before plunging.

Key Features

• M42 cobalt high-speed steel construction for improved heat and wear resistance over standard M2 HSS
• 6 fine-pitch flutes for efficient chip evacuation during heavy roughing passes
• Right-hand cut, right-hand flute geometry — standard orientation for conventional and climb milling
• Bright, uncoated finish — compatible with most cutting fluids and oils without coating compatibility concerns
• Non-center-cutting end type requires ramp or helical entry, not direct plunge
• 1.25-inch shank diameter fits common milling machine collets and end mill holders

Compatibility

Designed as an OEM-style roughing end mill for use in standard milling machine spindles accepting a 1.25-inch shank diameter. No specific machine model compatibility was provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or toolroom professional. Ensure the machine spindle is fully stopped and locked out before mounting or removing any end mill. Seat the shank fully into the collet or holder to the minimum engagement depth recommended by the toolholder manufacturer, and torque the retention hardware to the holder specification. Because this is a non-center-cutting tool, program a ramp-in or helical interpolation entry rather than a direct axial plunge.