Vargus 80551 Thread Mill 1/2-13 Internal 4 Flute Solid Carbide

Product Description

The VARGUS 80551 is a helical flute thread mill designed for cutting internal 1/2-13 UN threads in machined components. Built from micrograin solid carbide, this tool delivers consistent thread geometry with a 4-flute, right-hand configuration and a TiCN coating for improved wear resistance and surface finish. The cutting diameter measures 0.3500 inches with a length of cut of 0.9230 inches and an overall length of 3.5040 inches. The 3/8-inch shank diameter makes it compatible with standard collet and end mill holders found on CNC machining centers. It is intended for use by machinists and toolroom professionals in precision thread milling applications.

This thread mill is suited for internal thread milling in ferrous and non-ferrous materials where tap breakage risk, blind-hole threading, or multi-diameter threading on a single tool path is a concern. The 1/2-13 UN thread standard is common in general industrial, structural, and mechanical assembly applications. At 13 teeth per inch and a helical flute geometry, the 80551 produces clean thread forms in a single interpolated pass on capable CNC equipment. It is appropriate for job shops, production machining, and toolroom work where solid carbide tooling is specified.

Key Features

• Micrograin solid carbide substrate for rigidity and edge retention
• TiCN coating reduces tool wear and improves chip evacuation
• 4-flute, right-hand helical design for stable internal thread milling
• Cuts 1/2-13 UN internal threads with a 0.3500-inch cutting diameter
• 0.9230-inch length of cut accommodates typical thread depth requirements
• 3/8-inch shank diameter fits standard collet and ER toolholding systems

Compatibility

Designed for CNC machining centers capable of helical interpolation; fits standard 3/8-inch collet and end mill holders. Intended for internal 1/2-13 UN thread milling applications.

Installation Notes

Thread mills require a CNC control with helical interpolation capability - confirm machine compatibility before use. Secure the shank fully in a precision collet or end mill holder to minimize runout, which directly affects thread quality. Follow the tool manufacturer's recommended cutting parameters for carbide thread mills in the target workpiece material. Inspect the cutting edges for wear or chipping before each use and remove the tool from service if edge condition is compromised.