Vargus 80291 Helical Flute Thread Mill 3 Flute Solid Carbide

Product Description

The VARGUS 80291 is a solid carbide helical flute thread mill designed for internal thread milling in precision machining applications. With a 3/16-inch shank diameter and three right-hand helical flutes, this tool mills UNF and UNEF internal threads at 32 teeth per inch (TPI). The cutting diameter is 0.1500 inches with a length of cut (LOC) of 0.3910 inches and an overall length (OAL) of 1.7720 inches. A bright, uncoated finish keeps the carbide substrate exposed for applications where coating buildup or heat sensitivity is a concern. Coolant-through capability supports chip evacuation and tool life during continuous threading operations.

This thread mill is suited for job shops, aerospace component machining, and precision manufacturing environments where CNC milling centers perform internal threading in lieu of tapping. It handles three common thread sizes in one tool: 10-32, 12-3/8, and 8-32, reducing the need for multiple taps or dedicated tooling per size. It is installed and operated by machinists and CNC programmers running interpolated helical milling cycles on vertical or horizontal machining centers.

Key Features

• Solid carbide construction for rigidity and wear resistance in precise thread milling
• Three right-hand helical flutes for smooth cutting action on internal threads
• Coolant-through design aids chip evacuation and thermal management during threading
• Bright, uncoated finish suitable for applications requiring bare carbide performance
• Machines 10-32, 12-3/8, and 8-32 internal threads with a single tool
• Conforms to UNF and UNEF thread standards

Compatibility

Designed for internal thread milling on CNC machining centers capable of helical interpolation; compatible with 10-32, 12-3/8, and 8-32 UNF and UNEF thread forms as specified in the input data.

Installation Notes

Thread mills of this type are installed in a collet or end mill holder matching the 3/16-inch shank diameter on a CNC machining center capable of helical interpolation cycles. Verify spindle runout is within acceptable limits before use, as carbide thread mills are sensitive to runout and deflection at small diameters. Confirm correct coolant-through pressure and flow is active before beginning the threading cycle. Always reference the machine tool builder documentation and applicable shop standards when programming helical interpolation paths.