Hertel E199921264 Square End Mill 1/4 in 2 Flute Hss

Product Description

The HERTEL E199921264 is a single-end square end mill designed for general-purpose milling in ferrous and non-ferrous materials. Manufactured from high speed steel, it delivers consistent performance in conventional milling operations where carbide tooling is not required. The cutter features a 1/4 inch mill diameter, a 1-1/4 inch length of cut, and a 30-degree right-hand spiral helix. The bright, uncoated finish makes it straightforward to inspect for wear. With two flutes and a right-hand cutting direction, this end mill suits slotting, peripheral milling, and step milling on manual mills and CNC machining centers.

This end mill is suited for job shops, maintenance machining, and production environments where high speed steel tooling is the specified or preferred choice. The 3/8 inch shank diameter fits standard R8, ER, and weldon-style toolholders commonly found in knee mills and light-duty CNC machines. The 3-1/16 inch overall length provides adequate reach for standard-depth workpiece features without sacrificing rigidity. Centercutting capability allows plunge entry directly into the workpiece material.

Key Features

• 1/4 inch mill diameter with 1-1/4 inch length of cut for standard slotting and profiling
• High speed steel construction suitable for general-purpose and interrupted-cut applications
• 2-flute geometry promotes chip evacuation in slotting and softer materials
• 30-degree right-hand helix for smooth cutting action and reduced chatter
• Centercutting design allows direct plunge entry
• Bright uncoated finish for easy wear inspection and regrinding

Compatibility

Designed as a standard single-end square end mill compatible with any toolholder accepting a 3/8 inch shank diameter, including R8 collets, ER collet chucks, and weldon-style end mill holders used on knee mills and light-duty machining centers.

Installation Notes

Installation is performed by machinists using appropriate collet or end mill holder tooling; ensure the shank is fully seated and the holder is torqued per the toolholder manufacturer specification. Confirm spindle is at a full stop and machine is powered down before changing tooling. Do not exceed the recommended length of cut for the diameter to avoid deflection or breakage. Inspect the shank for nicks or burrs before seating to maintain runout within acceptable limits.