Hertel E199921260 Square End Mill 7/32 in 4 Flute Hss

Product Description

The HERTEL E199921260 is a 4-flute square end mill designed for general-purpose milling in ferrous and non-ferrous materials. It is manufactured from high speed steel (HSS) with a bright, uncoated finish and a 30-degree helix angle. The 7/32-inch cutting diameter and 1-1/4-inch length of cut make it well-suited for slotting, profiling, and peripheral milling operations on manual mills and CNC machining centers. The right-hand cutting and right-hand flute direction are standard for conventional milling applications. Machinists and toolroom technicians working in job shops, maintenance facilities, and production environments are the primary users of this tool.

This end mill fits applications requiring a 3/8-inch shank diameter collet or end mill holder. With a 3-1/16-inch overall length, it provides adequate reach for most standard workholding setups. The non-centercutting geometry means this tool is intended for peripheral and side milling rather than direct plunge cutting. It is appropriate for use on ferrous metals, alloys, and plastics where HSS tooling is specified over carbide, particularly in lower-speed or interrupted-cut conditions.

Key Features

• 7/32-inch (0.2188-inch) cutting diameter with 1-1/4-inch length of cut
• 4-flute spiral flute design for improved surface finish and chip evacuation
• 30-degree helix angle for balanced cutting forces on common work materials
• High speed steel construction suitable for low-to-moderate speed milling
• Bright, uncoated finish — no coating to account for in speeds and feeds calculations
• Right-hand cut, right-hand flute — compatible with standard spindle rotation
• Non-centercutting geometry; designed for side milling and profiling, not plunge entry

Compatibility

Designed for use in any 3/8-inch collet, end mill holder, or milling chuck on manual knee mills, CNC vertical machining centers, and toolroom mills that accept standard straight-shank end mills.

Installation Notes

Installation requires a clean, properly sized 3/8-inch collet or end mill holder — inspect for wear or runout before seating the tool. Power down the machine and lock out the spindle drive before inserting or removing the end mill. Torque the collet nut or set screw to the toolholder manufacturer's specification. Confirm runout with a dial indicator after clamping, as excessive runout will accelerate tool wear and degrade surface finish.