Hertel GG99914142 Square End Mill 3/4 in 2 Flute Hss

Product Description

The HERTEL GG99914142 is a 2-flute square end mill designed for general-purpose milling in a wide range of ferrous and non-ferrous materials. Built from M7 high speed steel with no coating applied, it delivers reliable cutting performance in conventional milling operations. The 3/4 inch cutting diameter pairs with a 1-5/8 inch length of cut and a 1/2 inch shank diameter, giving machinists a rigid, controllable tool for slotting, profiling, and peripheral milling. The 42-degree helix angle promotes efficient chip evacuation and reduces cutting forces across a variety of workpiece materials.

This end mill is suited for job shop and production environments where HSS tooling is preferred over carbide — particularly in interrupted cuts, manual machines, or applications where tool cost and regrindability matter. The centercutting geometry allows direct plunge entry into the workpiece without a pre-drilled hole. Right-hand cut and right-hand flute configuration is standard for use in conventional vertical and horizontal milling machines and machining centers running standard spindle rotation.

Key Features

• M7 high speed steel construction for toughness in interrupted and general-purpose cuts
• 42-degree helix angle for effective chip evacuation and reduced cutting force
• Centercutting design allows direct plunge milling without a pilot hole
• 2-flute configuration provides ample chip clearance in slotting and full-width cuts
• Spiral flute, uncoated finish — suitable for regrinding to extend tool life
• Right-hand cut, right-hand flute — standard orientation for most milling setups

Compatibility

Designed for use in milling machines and machining centers accepting a 1/2 inch shank diameter. Suitable for standard ER, R8, and similar collet systems accommodating 1/2 inch tooling shanks.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the collet or end mill holder. Verify that the shank is clean and fully seated to the proper engagement depth in the holder to prevent runout and tool pullout under load. Do not exceed the tool manufacturer recommended speeds and feeds for the specific workpiece material and cut type.