Hertel E1050027 Square End Mill 27/64 in 2 Flute Hss

Product Description

The HERTEL E1050027 is a double-end, square-profile end mill designed for milling, slotting, and contouring operations on metalworking machines. Built from M7 high speed steel, it carries a 27/64-inch (0.4219 inch) cutting diameter with a 13/16-inch (0.8125 inch) length of cut. The 1/2-inch shank fits standard ER and straight-bore toolholders found on knee mills, CNC machining centers, and manual lathes with milling attachments. Two right-hand spiral flutes at a 30-degree helix angle clear chips efficiently during light-to-medium cuts. The uncoated finish makes it easy to resharpen. At 0.15 pounds, it is a compact tool suited for general-purpose material removal on steel, aluminum, and similar machinable metals.

This end mill is used in job shop, maintenance, and production environments where a reliable general-purpose HSS cutter is needed. The centercutting geometry allows direct plunge entry into the workpiece without a pre-drilled hole, which is useful for pocket milling and slot entry. The double-end design provides two usable cutting ends, extending service life before the tool requires resharpening or replacement. Machinists and tool-and-die technicians working on manual or CNC mills are the typical end users.

Key Features

• 27/64-inch cutting diameter (0.4219 inch decimal equivalent) for precise fractional-size slots and pockets
• M7 high speed steel construction offers good toughness and grindability for general metalworking
• Double-end design provides two cutting ends per tool
• Centercutting geometry allows plunge milling without a pilot hole
• 30-degree right-hand spiral flutes promote chip evacuation and smooth cutting action
• Uncoated finish simplifies resharpening on standard tool grinders

Compatibility

Designed as a general-purpose replacement or production-stock square end mill for use in standard 1/2-inch straight-bore or collet-style toolholders on manual and CNC milling machines.

Installation Notes

Installation is performed by machinists or toolroom technicians. Secure the 1/2-inch shank in a clean, properly sized collet or end mill holder and torque to the toolholder manufacturer's specification before use. Confirm spindle runout is within acceptable limits before beginning a cut. Always power down and lock out the machine spindle before changing or inspecting tooling.