Hertel 91193136 Roughing End Mill 3/4 in 4 Flute Cobalt

Product Description

The HERTEL 91193136 is a single-end roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel and coated with Titanium Nitride (TiN), it delivers heat resistance and edge durability under heavy cutting loads. The tool measures 0.75 inches in diameter with a 4.125-inch length of cut and a 6.375-inch overall length. Four right-hand flutes with a coarse pitch pattern break chips efficiently and reduce chatter during roughing passes. This end mill is centercutting, allowing plunge entry into workpieces. It is installed and used by machinists and toolroom professionals on vertical mills and CNC machining centers.

This roughing end mill is suited for roughing passes on ferrous and non-ferrous metals in both job-shop and production environments. The coarse pitch flute geometry accelerates stock removal compared to standard finishing end mills, making it a practical choice when cutting deep pockets, slots, or profiles prior to a finish pass. The 0.75-inch shank diameter fits standard R8, CAT, BT, and direct-mount tool holders used in most shop environments.

Key Features

• M42 cobalt steel construction for improved red hardness and wear resistance
• Titanium Nitride (TiN) coating reduces friction and extends tool life
• Coarse pitch, 4-flute geometry for aggressive chip evacuation during roughing
• Centercutting design allows direct plunge milling without pre-drilling
• Right-hand cut and right-hand flute direction for standard spindle operation
• Matched shank and cutter diameter at 0.75 inches for rigid, low-runout mounting

Compatibility

Designed as a direct-fit roughing end mill for use in standard 3/4-inch end mill holders, collet chucks, and milling machine spindles that accept a 0.75-inch shank diameter.

Installation Notes

This tool is installed by machinists using appropriate end mill holders or collet systems rated for the shank diameter. Ensure the spindle and tool holder are clean and free of debris before seating the shank. Confirm tool runout with a dial indicator after tightening to minimize premature edge wear. Follow shop safety protocols and machine guarding requirements when operating milling equipment.