Hertel E199921307 Square End Mill 3/4 in 4 Flute Hss

Product Description

The HERTEL E199921307 is a 4-flute square end mill designed for general-purpose milling operations in ferrous and non-ferrous materials. Manufactured from high speed steel (HSS) with a bright, uncoated finish, this end mill features a 30-degree helix angle and right-hand cutting and flute direction. The 3/4 inch diameter cutting edge, combined with a 1-5/8 inch length of cut, makes it well suited for slotting, profiling, and peripheral milling. It is centercutting, allowing plunge entry into the workpiece. Machinists and toolroom professionals are the primary installers and operators of this tool.

This end mill is used in manual and CNC milling machines for shop, production, and toolroom applications. The 5/8 inch shank diameter fits standard milling collets and end mill holders commonly found in vertical and horizontal milling setups. The 3-3/4 inch overall length provides adequate reach for typical workpiece geometries without introducing excessive overhang. The uncoated HSS construction makes it a cost-effective choice for lower-speed operations and regrindable tooling programs.

Key Features

• 3/4 inch (0.750 inch) cutting diameter with 1-5/8 inch (1.625 inch) length of cut
• 4-flute geometry for improved surface finish and feed rate capability
• High speed steel construction — regrindable and suitable for a wide range of workpiece materials
• 30-degree helix angle for efficient chip evacuation in slotting and profiling cuts
• Centercutting design allows direct plunge entry without pre-drilling
• Right-hand cut and right-hand spiral flute direction for standard milling setups
• Bright, uncoated finish — no coating buildup risk on aluminum or non-ferrous materials

Compatibility

Designed as a standard 5/8 inch shank square end mill compatible with collet chucks, end mill holders, and milling adapters accepting a 5/8 inch straight shank in manual or CNC milling machines.

Installation Notes

Installation is performed by a machinist or toolroom professional. Ensure the milling machine spindle is fully stopped and locked out before inserting or removing the end mill from the holder. Seat the shank fully into the collet or holder to the recommended minimum engagement depth and torque the retention hardware per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning cuts, and select speeds and feeds appropriate for HSS tooling and the workpiece material being machined.