Hertel GC99914157 Square End Mill 5/8 in 2 Flute Hss M7

Product Description

The HERTEL GC99914157 is a 2-flute square end mill designed for general-purpose milling operations in high speed steel (HSS) M7 grade. With a 0.625-inch mill diameter, a 1.625-inch length of cut, and a 3.75-inch overall length, this tool is built for slotting, profiling, and peripheral milling on a range of workpiece materials. The 30-degree helix angle promotes efficient chip evacuation, while the uncoated finish suits applications where surface lubricity is provided by cutting fluid. Machinists and toolroom operators handling manual or CNC knee mills, vertical machining centers, and similar equipment will find this a reliable general-purpose cutter.

This end mill is appropriate for ferrous and non-ferrous machining where a standard 2-flute geometry is preferred for chip clearance. The centercutting design allows plunge cutting in addition to side milling and slotting. The right-hand cut and right-hand spiral flute configuration is standard for conventional spindle rotation. It is well suited to job shop, toolroom, and production environments requiring a consistent HSS square end mill in the common 5/8-inch diameter range.

Key Features

• M7 high speed steel construction provides toughness and wear resistance across a broad range of workpiece materials
• 2-flute spiral design maximizes chip clearance for slotting and plunge cutting operations
• 30-degree helix angle promotes smooth cutting action and reduces chatter
• Centercutting geometry enables direct plunge entry without pre-drilling
• Uncoated finish compatible with flood coolant and cutting oil applications
• Matched shank and cutter diameter at 0.625 inches simplifies collet and end mill holder setup

Compatibility

Designed as an OEM-style replacement or direct-fit square end mill for standard 5/8-inch collets, end mill holders, and ER-style tooling systems used on vertical milling machines and CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the collet or end mill holder and tighten to the tool holder manufacturer's specified torque range using the appropriate spanner or torque wrench. Verify runout with a dial indicator before beginning a cut, particularly for precision profiling work.