Accupro 930-87514 Thread Mill 7/8-14 Internal Solid Carbide

Product Description

The ACCUPRO 930-87514 is a helical flute thread mill designed for cutting internal 7/8-14 UNF threads in solid carbide construction with a TiAlN coating. It features 4 flutes and a 0.49-inch cutting diameter with a 1.375-inch length of cut, making it suited for precision internal thread milling operations on CNC machining centers. The micrograin carbide substrate provides the hardness and wear resistance required for threading ferrous and non-ferrous materials. The TiAlN coating adds heat resistance, extending tool life in demanding cutting conditions. This tool carries a 1/2-inch shank diameter for secure tool holding.

This thread mill is used in CNC machining environments where helical interpolation is employed to generate internal threads. It is applicable in job shop, production, and aerospace machining contexts where UNF thread forms are required in bored or drilled holes meeting the minimum nominal diameter of 0.875 inches. Typical materials include steel alloys, stainless steel, aluminum, and cast iron. No coolant-through capability is present, so external coolant or mist application is standard practice for this tool.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention
• TiAlN coating for elevated heat resistance and extended tool life
• 4-flute helical design for efficient chip evacuation in internal thread milling
• Cuts 7/8-14 UNF internal threads with 14 teeth per inch
• 0.49-inch cutting diameter with 1.375-inch length of cut
• 1/2-inch shank diameter for compatibility with standard tool holders

Compatibility

Designed for use in CNC machining centers capable of helical interpolation, targeting internal 7/8-14 UNF thread applications with a minimum nominal bore diameter of 0.875 inches.

Installation Notes

Installation and operation of this thread mill should be performed by a qualified CNC machinist or tooling technician. Secure the 1/2-inch shank in a properly sized collet or end mill holder and verify runout before beginning cuts. Power down and lock out the spindle before any tool changes. Program the CNC controller for helical interpolation consistent with the 7/8-14 UNF thread pitch — do not attempt to use this tool in a manual or non-interpolating machine.