Scientific Cutting Tools TMI335-20HA Thread Mill 7/16-20

Product Description

The SCIENTIFIC CUTTING TOOLS TMI335-20HA is a helical flute thread mill designed for cutting internal UNF threads in a CNC machining environment. Built from submicron-grade solid carbide and coated with AlTiN+, it handles 7/16-20 internal threads with a 0.3350-inch cutting diameter and a 7/8-inch length of cut. The long-reach design provides clearance in deeper bores where standard-length tools cannot reach. Four right-hand flutes deliver clean thread profiles while managing chip evacuation. This tool is used by machinists and tool-and-die professionals in precision manufacturing, repair, and production threading applications.

This thread mill is suited for internal threading operations on materials where solid carbide tooling is appropriate, including steel, stainless, aluminum, and similar workpiece materials. The AlTiN+ coating improves heat resistance and tool life at elevated cutting speeds. The long-reach geometry makes it a practical choice for bores where the thread entry is recessed or where standard-length thread mills would interfere with the workpiece. A 3/8-inch shank diameter fits standard ER and other common CNC tool holders.

Key Features

• Cuts 7/16-20 UNF internal threads in a single helical interpolation pass
• Submicron-grade solid carbide blank for rigidity and wear resistance
• AlTiN+ coating for elevated heat resistance and extended tool life
• Long-reach thread mill type provides clearance in deep or recessed bore applications
• Four right-hand flutes with 0.3350-inch cutting diameter
• 3/8-inch shank fits standard CNC mill tool holders

Compatibility

Designed for use in CNC machining centers capable of helical interpolation. Fits standard 3/8-inch ID collet chucks and end mill holders. Intended for 7/16-20 UNF internal thread applications.

Installation Notes

Thread mills require a CNC machining center with helical interpolation capability - confirm G-code support before use. Secure the shank fully in the tool holder and verify runout before cutting. Power down the spindle and confirm the tool is fully stopped before making any tool changes or adjustments. Follow shop-specific speeds and feeds for the workpiece material and consult the manufacturer cutting data for AlTiN+-coated carbide tooling.