Hertel E899921292 Square End Mill 1/2 in 2 Flute Hss Tin

Product Description

The HERTEL E899921292 is a 2-flute, single-end square end mill designed for general-purpose milling in ferrous and non-ferrous metals, plastics, and composites. Ground from high speed steel (HSS) stock, it carries a titanium nitride (TiN) coating that extends tool life by reducing friction and increasing surface hardness at the cutting edge. The mill measures 0.5 inches in diameter with a 1-inch length of cut (LOC) and a 3.25-inch overall length (OAL). A 30-degree spiral helix angle promotes efficient chip evacuation and reduces cutting forces, making it suitable for slotting, profiling, and light pocket-milling operations. Machinists and tool-and-die professionals are the primary installers and operators.

This end mill is suited for manual knee mills, CNC machining centers, and bridgeport-style equipment where a 0.5-inch shank diameter collet or end mill holder is available. The centercutting geometry allows plunge entry into the workpiece without a pre-drilled hole, adding versatility in die and mold work. Right-hand cut with right-hand flute direction is standard orientation for conventional and climb-milling passes on typical shop equipment. It fits production and maintenance machining environments in both job-shop and industrial settings.

Key Features

• High speed steel construction provides toughness in interrupted cuts and on manual machines
• Titanium nitride (TiN) coating increases surface hardness and reduces built-up edge
• 30-degree helix angle promotes smooth chip flow in slotting and profiling operations
• Centercutting design allows direct plunge milling without a starter hole
• Right-hand cut and right-hand flute direction match standard spindle rotation on most mills
• Single-end configuration with a square corner profile for flat-bottom features and sharp shoulders

Compatibility

Designed for use in any machine tool accepting a 0.5-inch shank diameter through a collet, end mill holder, or Weldon-style chuck. Compatible with standard ER32, ER40, and equivalent collet systems sized for 0.5-inch tooling.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and lock out the spindle before changing tooling. Seat the shank fully into the collet or holder and tighten to the tool holder manufacturer's specified procedure before starting the spindle. Inspect the TiN coating and cutting edges for chips or wear before each use; a damaged edge should be reground or replaced rather than run to avoid workpiece damage or tool breakage.