Harvey Tool 826526 Thread Mill M4 X 0.70 4 Flute Carbide

Product Description

The HARVEY TOOL 826526 is a single profile thread mill designed to cut M4 x 0.70 threads in both internal and external configurations. Built from solid carbide, it features 4 flutes and a bright/uncoated finish. With an overall length of 1.4961 inches (38 mm) and a neck length of 0.5512 inches, this tool is suited for close-tolerance threading operations on CNC machining centers. The single profile geometry allows one tool to handle a range of thread pitches when programmed correctly, giving shops flexibility without swapping tooling. Licensed machinists and CNC programmers working in precision manufacturing, tool rooms, and job shops are the primary users.

This thread mill is intended for use in CNC milling applications requiring M4 x 0.70 metric threads. The internal and external capability makes it practical for threading both bores and external bosses within the same setup. It is well-suited for small-diameter threading in materials where rigid tapping is not preferred, including stainless steel, aluminum, and hardened workpieces. The compact geometry and solid carbide construction support use in high-speed machining environments where thread quality and repeatability are critical.

Key Features

• Single profile design cuts M4 x 0.70 internal and external threads with one tool
• Solid carbide construction provides rigidity and wear resistance in demanding materials
• 4-flute geometry balances chip evacuation and cutting stability at thread mill speeds
• Bright/uncoated finish suitable for use with cutting fluids across a range of workpiece materials
• Compact overall length of 1.4961 inches supports use in confined bores and tight fixturing
• Neck length of 0.5512 inches provides clearance for threading shallow to moderate depth features

Compatibility

Designed for use in CNC machining centers capable of helical interpolation. Compatible with M4 x 0.70 metric thread forms per ISO standards for internal and external thread milling applications.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation; verify machine compatibility before use. Secure the tool in a collet or end mill holder appropriate for the 3 mm shank diameter, ensuring adequate grip length to prevent pullout. Run at manufacturer-recommended speeds and feeds for solid carbide thread mills in the target material, and use appropriate cutting fluid or coolant to extend tool life. Never use this tool in a conventional drill press or manual milling machine.