Harvey Tool 987134-C3 Thread Mill 10-24 Internal 3 Flute Carbide

Product Description

The HARVEY TOOL 987134-C3 is a solid carbide helical flute thread mill designed for cutting internal 10-24 threads in a wide range of materials. It features 3 flutes and a 3/16-inch (0.1875 inches) shank diameter, with a cutting diameter of 0.1450 inches and a length of cut of 0.5000 inches. The AlTiN coating increases surface hardness and heat resistance, extending tool life in demanding machining environments. This tool is installed by machinists and CNC programmers working on precision thread-milling operations in job shops, production facilities, and toolrooms.

This thread mill is suited for internal thread milling applications requiring a 10-24 thread form with 24 teeth per inch. Its compact cutting diameter and helical flute geometry make it appropriate for threading operations in confined bores or small-diameter features. The 2.5-inch overall length provides adequate reach for standard workpiece setups on vertical and horizontal machining centers. It is not equipped with coolant-through capability, so external coolant or air blast is the standard approach during operation.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision threading
• AlTiN coating for elevated heat resistance and extended tool life
• 3-flute helical geometry for efficient chip evacuation during internal thread milling
• 10-24 internal thread form at 24 TPI for standard unified coarse thread applications
• 0.1450-inch cutting diameter suited to small-bore internal threading
• No coolant-through design — compatible with external coolant or air-blast delivery

Compatibility

Designed for internal thread milling of 10-24 unified threads with a minimum nominal diameter of 0.1900 inches. Suitable for use on CNC machining centers capable of helical interpolation.

Installation Notes

Thread mills of this type are installed by qualified machinists or CNC operators and require a machining center with helical interpolation capability. Confirm tool runout and holder concentricity before operation to protect the cutting edge on this small-diameter carbide tool. Secure the shank fully within the tool holder collet to the recommended grip depth before use. Follow all machine guarding and PPE requirements per your facility safety program.