Hertel GG99914224 Keyway End Mill 1/8 in 2 Flute Hss

Product Description

The HERTEL GG99914224 is a 2-flute, centercutting keyway end mill designed for precision slot milling, keyway cutting, and profiling operations in metalworking environments. Manufactured from high speed steel (HSS), this end mill measures 1/8 inch in cutting diameter with a 3/8-inch length of cut (LOC) and a 3/8-inch shank diameter. The uncoated HSS construction delivers reliable performance across ferrous and non-ferrous workpieces. With an overall length (OAL) of 2-5/16 inches, this tool fits standard milling chucks and collet systems commonly used by machinists and tool-and-die professionals.

This end mill is suited for manual milling machines and CNC machining centers requiring small-diameter slotting work. It is a practical choice for keyway production, step milling, and light profile cuts in mild steel, aluminum, brass, and similar materials. The centercutting geometry allows plunge cutting when required, adding versatility to standard peripheral milling operations. Typical users include machinists, maintenance technicians, and industrial fabricators working in job shops or production facilities.

Key Features

• 1/8-inch cutting diameter for precision small-slot and keyway applications
• 3/8-inch length of cut for adequate reach in standard keyway depths
• 2-flute spiral flute design optimized for slot milling and chip evacuation
• Centercutting capability allows direct plunge entry into workpiece material
• High speed steel construction provides toughness and resistance to chipping under interrupted cuts
• Uncoated finish suitable for use with cutting fluid across a range of common workpiece materials

Compatibility

Designed as a standard keyway end mill for use in manual knee mills, bridgeport-style machines, and CNC machining centers accepting a 3/8-inch shank diameter collet or end mill holder.

Installation Notes

Installation should be performed by a qualified machinist following proper tool-holding procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the collet or holder. Seat the shank to the minimum recommended insertion depth per the tool holder manufacturer specification to prevent pullout under load. Always verify spindle speed and feed rate against the tool manufacturer recommendations for the specific workpiece material before beginning a cut.