Vargus 80263 Helical Flute Thread Mill 4-40 Internal

Product Description

The VARGUS 80263 is a solid carbide helical flute thread mill designed for cutting internal 4-40 UN threads in precision machining applications. Built from micrograin solid carbide and finished with a TiCN coating, this tool delivers consistent thread quality in hardened and abrasive workpiece materials. It operates with a right-hand flute direction, features 3 flutes, and cuts at 40 teeth per inch (TPI). The cutting diameter is 0.0830 inches, with a length of cut of 0.3540 inches and an overall length of 2.2440 inches. Machinists and CNC operators in tool rooms, job shops, and production environments rely on this class of thread mill for accurate, single-pass internal threading where tap breakage risk must be minimized.

The 80263 is suited for internal thread milling in ferrous and non-ferrous materials where a 4-40 UN thread form is required. Its compact cutting geometry and helical flute design make it appropriate for blind holes and through holes in precision components. The TiCN coating extends tool life in applications involving cast iron, stainless steel, and hardened alloys. This tool is typically run on CNC machining centers capable of helical interpolation. It is not designed for hand-held or manual threading operations.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• TiCN coating extends tool life in abrasive and ferrous materials
• 3-flute helical design supports smooth chip evacuation in blind and through holes
• Right-hand flute direction for standard CNC helical interpolation routines
• 40 TPI cutting geometry produces 4-40 UN internal threads
• No coolant-through design - suitable for external flood or mist coolant setups

Compatibility

Designed as an OEM-style thread milling tool for CNC machining centers capable of helical interpolation, producing internal 4-40 UN threads in a range of workpiece materials.

Installation Notes

This tool is installed and run by machinists and CNC programmers on 3-axis or multi-axis machining centers. Verify that the machine control supports helical interpolation before programming a thread milling cycle. Secure the shank firmly in a precision collet or toolholder to the manufacturer-specified clamping method before spindle engagement. Inspect the cutting edges and coating condition before each use, and do not exceed the recommended depth of cut for the 4-40 thread form.