Vargus 80545 Thread Mill 5/16-18 Internal 3 Flute Solid Carbide

Product Description

The VARGUS 80545 is a helical flute thread mill designed for cutting internal 5/16-18 UN threads in a single helical pass. Built from micrograin solid carbide and coated with TiCN, this tool delivers consistent thread geometry and extended tool life in demanding machining environments. The right-hand flute direction and 3-flute design balance chip evacuation with cutting stability. With an overall length of 2.52 inches and a length of cut of 0.667 inches, it is sized for standard CNC machining centers running thread milling cycles. Machinists and tooling specialists in job shops, aerospace, and general manufacturing use this mill for precise internal threading on ferrous and non-ferrous workpieces.

This thread mill is suited for internal threading applications requiring a 5/16-18 UN thread form at 18 teeth per inch. The 0.232 inch cutting diameter and 1/4 inch shank diameter make it compatible with standard ER or straight-shank collet toolholders commonly found on 3-axis and 4-axis CNC machining centers. It is appropriate for production and prototype work where thread milling is preferred over tapping, particularly in blind holes or hard materials where tap breakage is a concern.

Key Features

• Micrograin solid carbide substrate for rigidity and wear resistance in hard materials
• TiCN coating reduces friction and extends tool life versus uncoated carbide
• 3-flute helical design promotes efficient chip evacuation during internal thread milling
• Right-hand flute direction compatible with standard CNC thread milling cycles
• 5/16-18 UN thread standard with 18 TPI for precise inch-series internal threads
• No coolant-through requirement simplifies toolholder setup

Compatibility

Designed as an OEM-style thread milling tool for CNC machining centers capable of helical interpolation and thread milling cycles, using 1/4 inch straight-shank or collet toolholders.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation. Ensure the toolholder is properly torqued and the shank is fully seated in the collet before running a cycle. Verify spindle speed and feed rate against the tool manufacturer recommendations for the workpiece material before cutting. Inspect the cutting edges for wear or chipping before each use, as carbide thread mills are sensitive to interrupted cuts and should not be forced into an undersized pilot hole.