Hertel E199921246 Square End Mill 9/64 in 4 Flute Hss

Product Description

The HERTEL E199921246 is a square end mill designed for precision milling operations in metal fabrication and machining applications. Built from high speed steel (HSS), this single-end tool features a 9/64 inch (0.1406 inch) cutting diameter with a 1/2 inch length of cut and a 30-degree helix angle. Four right-hand spiral flutes provide efficient chip evacuation during cutting passes. The bright, uncoated finish is suited for general-purpose milling where a specialized coating is not required. Licensed machinists and tool-and-die professionals are the primary installers of this type of end mill.

This end mill is used in vertical milling machines, CNC machining centers, and manual knee mills for slotting, profiling, and peripheral milling operations. The 3/8 inch shank diameter fits standard collet chucks and end mill holders commonly found in light-duty and medium-duty machining setups. The 2-3/8 inch overall length keeps the tool compact, reducing deflection during cuts in shallow-to-medium depth applications. It is well suited for ferrous and non-ferrous metals in general production and toolroom environments.

Key Features

• High speed steel construction for general-purpose metal milling
• 9/64 inch (0.1406 inch) cutting diameter with 1/2 inch length of cut
• 4 right-hand spiral flutes for efficient chip removal
• 30-degree helix angle reduces cutting forces and improves surface finish
• Bright/uncoated finish for standard milling applications
• Single-end design with 3/8 inch straight shank for common collet and holder compatibility

Compatibility

Designed as an OEM-style replacement or direct-use end mill for standard 3/8 inch collet chucks and end mill holders used in vertical milling machines and CNC machining centers.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Always power down and lock out the spindle before changing tooling. Secure the shank fully within the collet or holder to the recommended engagement depth for the holder type in use. Inspect the cutting edges and shank for damage before mounting; do not use chipped or deformed tooling.