Hertel GG99915667 Keyway End Mill 1 in 2 Flute Hss

Product Description

The HERTEL GG99915667 is a 2-flute, straight-flute keyway end mill designed for cutting keyways and slots in metal workpieces. Built from high speed steel (HSS), this end mill offers toughness and wear resistance for milling operations in a machine shop or maintenance environment. The 1-inch cutting diameter pairs with a 1-inch shank diameter for a rigid, chatter-resistant setup. With a 1.625-inch length of cut and a 4.125-inch overall length, this tool is sized for standard keyway work in both manual and CNC milling machines. The uncoated finish suits general-purpose ferrous and non-ferrous applications. Machinists and tool-and-die technicians are the primary users.

This keyway end mill is suited for cutting straight keyways in shafts, hubs, and mechanical components where precise slot geometry is required. The straight flute and zero helix design provides clean, controlled chip evacuation in keyway and slotting applications. It is appropriate for use in vertical knee mills, Bridgeport-style machines, and CNC machining centers equipped with the correct collet or end mill holder accepting a 1-inch shank. Typical applications include maintenance, repair, and original equipment manufacturing in industrial settings.

Key Features

• 1-inch cutting diameter with matching 1-inch shank diameter for rigid tool holding
• 1.625-inch length of cut accommodates standard keyway depths
• 2-flute straight-flute geometry optimized for keyway and slot milling
• Zero helix angle promotes axial cutting forces suitable for straight plunge and slot work
• High speed steel construction provides toughness for interrupted cuts and general milling
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Uncoated finish compatible with a wide range of cutting fluids and materials

Compatibility

Designed as a standard 1-inch shank keyway end mill suitable for use in milling machine spindles, collet chucks, and end mill holders accepting a 1-inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom practices. Secure the shank fully in a clean, properly sized collet or end mill holder and torque the retention system per the machine manufacturer's guidelines. Inspect the tool for chips or edge damage before each use. Follow applicable shop safety procedures including machine guarding and appropriate cutting fluid application for the workpiece material.