Hertel E199921308 Square End Mill 13/16 in 4 Flute Hss

Product Description

The HERTEL E199921308 is a 4-flute square end mill designed for general-purpose milling operations in ferrous and non-ferrous metals. Built from high speed steel with a bright uncoated finish, it features a 13/16 inch (0.8125 inch) cutting diameter and a 30-degree right-hand spiral helix that promotes efficient chip evacuation and smooth cutting action. The centercutting geometry allows the tool to plunge directly into a workpiece as well as perform peripheral and slot milling. With a 1-7/8 inch length of cut and a 4-inch overall length, it is suited for moderate-depth applications where reach and rigidity are both priorities.

This end mill is intended for use in manual and CNC vertical mills, knee mills, and machining centers. It is a practical choice for job shops, tool rooms, and maintenance machining environments where high speed steel tooling is preferred over carbide for interrupted cuts, manual feeds, or lower-spindle-speed machines. The 5/8 inch shank diameter fits standard collets and end mill holders commonly found in both manual and CNC setups.

Key Features

• 13/16 inch (0.8125 inch) cutting diameter with 4 flutes for balanced material removal and surface finish
• High speed steel construction tolerates interrupted cuts and lower coolant conditions better than carbide
• Centercutting design enables plunge milling in addition to peripheral and slot cuts
• 30-degree right-hand helix promotes chip lift and reduces cutting heat in the flute
• Bright uncoated finish suitable for a wide range of workpiece materials without coating-compatibility concerns
• Right-hand cutting direction compatible with standard spindle rotation on vertical mills and machining centers

Compatibility

Designed as a standard-shank replacement end mill for use in any machine tool spindle accepting a 5/8 inch straight shank via collet chuck or end mill holder.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing the end mill from the holder. Seat the shank fully into the collet or holder to the minimum insertion depth recommended by the holder manufacturer to prevent pullout under load. Inspect the shank and flutes for chips or damage before each use, and confirm spindle speed and feed rate are appropriate for high speed steel tooling in the selected workpiece material before engaging the cut.