Hertel E199921271 Square End Mill 21/64 in 2 Flute Hss

Product Description

The HERTEL E199921271 is a single-end, square-profile end mill designed for milling, slotting, and profiling operations in metalworking applications. Manufactured from high speed steel, it measures 0.3281 inches (21/64 inches) in cutting diameter with a 9/16 inch length of cut and a 2-1/2 inch overall length. The 30-degree helix angle and two-flute configuration support chip evacuation and smooth cutting action. Center-cutting capability allows the tool to plunge directly into a workpiece. This tool is typically installed and operated by machinists and tool-and-die professionals working on manual or CNC milling machines.

This end mill suits general-purpose machining tasks in job shops, maintenance environments, and production settings. Its bright, uncoated finish makes it appropriate for use on a range of ferrous and non-ferrous materials where coated tooling is not required. The 3/8 inch shank diameter fits standard collets and end mill holders common to vertical milling machines and machining centers. Right-hand cutting and right-hand flute direction are standard for conventional milling setups.

Key Features

• 21/64 inch (0.3281 inch) cutting diameter with 9/16 inch length of cut
• High speed steel construction for general-purpose ferrous and non-ferrous machining
• 30-degree helix angle promotes efficient chip flow
• Center-cutting design allows direct plunge entry into workpiece
• Right-hand cut, right-hand spiral flutes for conventional milling
• Bright, uncoated finish — no additional coating treatment

Compatibility

Designed as a standard-shank replacement end mill for use in 3/8 inch collets and end mill holders on vertical milling machines, knee mills, and compatible CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the milling machine spindle is fully powered down and locked out before changing tooling. Seat the shank fully into the collet or tool holder and tighten to the holder manufacturer's specified torque before operation. Verify runout with a dial indicator after installation to confirm proper seating and minimize tool deflection.