Hertel GG99914243 Keyway End Mill 1 in 2 Flute Hss

Product Description

The HERTEL GG99914243 is a 2-flute, centercutting keyway end mill ground from high speed steel and intended for milling keyways, slots, and pockets in ferrous and non-ferrous workpieces. The tool carries a 1-inch cutting diameter and a 1.625-inch length of cut, with a 1-inch straight shank and a 4.125-inch overall length. The uncoated HSS construction suits general-purpose shop work where regrinding is common practice. Machinists and tool-and-die technicians are the primary installers on vertical mills, CNC machining centers, and knee mills.

This end mill is suited for production and maintenance machining operations that require keyway cutting or conventional slot milling in steel, aluminum, cast iron, and similar materials. The centercutting geometry allows plunge entry directly into the workpiece, making it practical for blind pocket starts without a pre-drilled hole. The spiral flute design promotes chip evacuation and helps maintain surface finish across the full length of cut.

Key Features

• Centercutting design allows direct plunge entry for blind pocket and slot starts
• 2-flute spiral geometry promotes chip evacuation in slot and keyway cuts
• High speed steel construction supports regrinding to extend tool life
• Uncoated finish suitable for general-purpose ferrous and non-ferrous applications
• 1-inch straight shank compatible with standard ER and end mill holders

Compatibility

Designed as an OEM-style replacement or direct substitute for standard 1-inch diameter, 2-flute keyway end mills used in vertical milling machines and CNC machining centers accepting a 1-inch straight shank holder.

Installation Notes

Installation is performed by a machinist or toolroom technician. The machine spindle must be stopped and the tool holder verified clean and free of chips before securing the shank. Ensure the end mill is clamped to the full depth recommended by the tool holder manufacturer to prevent pullout under cutting loads. Do not exceed the feed and speed parameters appropriate for high speed steel tooling in the workpiece material being cut.