Harvey Tool 54260-C3 Thread Mill 3/8-16 to 3/8-40 Altin Carbide

Product Description

The HARVEY TOOL 54260-C3 is a solid carbide single profile thread mill designed to cut both internal and external threads ranging from 3/8-16 to 3/8-40, covering 16 to 40 TPI with a single tool. The cutting diameter is 0.3 inches, supported by a 0.375-inch shank and a neck diameter of 0.219 inches. The AlTiN coating extends tool life in ferrous and high-temperature alloy materials by reducing heat absorption at the cutting edge. With 4 flutes and a 2.5-inch overall length, this tool is suited for CNC machining centers running helical interpolation thread milling cycles.

This thread mill is intended for use on CNC machining centers where a single tool must produce multiple thread pitches in the 3/8 thread size range. It handles both internal and external thread forms, making it practical for shops that need versatility without a dedicated tap for each pitch. The 1.25-inch neck length provides clearance for threading into blind holes and standard-depth bores. Typical applications include precision component machining in aerospace, medical, and general manufacturing environments where thread quality and tool life are critical.

Key Features

• Cuts internal and external threads from 3/8-16 to 3/8-40 with one tool
• AlTiN coating for extended tool life in ferrous and hard materials
• Solid carbide construction for rigidity and dimensional stability
• 4-flute geometry for efficient chip evacuation during helical interpolation
• 0.219-inch neck diameter provides clearance in blind hole applications
• 1.25-inch neck length accommodates standard bore depths in the 3/8 thread range

Compatibility

Designed as a single profile thread mill for CNC machining centers capable of helical interpolation; compatible with standard 3/8-inch collet or end mill toolholders.

Installation Notes

Installation and operation should be performed by a qualified CNC machinist familiar with thread milling cycles and helical interpolation programming. Secure the shank fully in a collet or end mill holder, ensuring runout is minimized before cutting. Thread milling requires a CNC control capable of executing G02 or G03 helical arc moves with proper pitch programming. Do not use this tool in manual machines or as a rigid-tap replacement.