Helical Solutions 81640 Square End Mill 3/16 in 4 Flute Carbide

Product Description

The HELICAL SOLUTIONS 81640 is a 4-flute, solid carbide square end mill designed for high-performance milling in steel and ferrous materials. With a 3/16 inch cutting diameter and 1 inch length of cut, this single-end tool delivers precise material removal in demanding machining environments. The APLUS coating improves wear resistance and thermal stability during extended cutting cycles. Variable index flute spacing reduces harmonic vibration, resulting in smoother cuts and longer tool life in production settings. This end mill is suited for machinists and tool-and-die professionals running steel components on CNC milling machines and machining centers.

The 81640 is built for milling low- to high-alloy steels and is part of the Helical Solutions End Mills for Steels series. Its 3/16 inch straight cylindrical shank mates with standard collet chucks and end mill holders. The 2.5 inch overall length provides enough reach for pocket, slot, and contour operations without sacrificing rigidity. This tool is a practical choice for shops running production steel parts where tool life and dimensional consistency are priorities.

Key Features

• Solid carbide construction for rigidity and heat resistance in steel milling
• APLUS coating reduces friction and extends tool life in ferrous applications
• Variable index flute spacing minimizes chatter and vibration during cuts
• Center-cutting geometry allows for direct plunging into workpiece material
• Right-hand cut and right-hand helical flutes for standard CNC mill operation
• Straight cylindrical shank compatible with standard collet and end mill holder systems

Compatibility

Designed as part of the Helical Solutions End Mills for Steels - 4 Flute - Square - Variable Pitch series, intended for use with standard 3/16 inch collet chucks and end mill holders on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist familiar with CNC tooling and workholding practices. Ensure the machine spindle is fully stopped and locked out before loading or changing tooling. Seat the shank fully into the collet or holder and torque the retaining nut to the tool holder manufacturer specification. Verify runout with a dial indicator before beginning a production run, and confirm cutting parameters match the tool manufacturer recommendations for the specific steel grade being machined.