Scientific Cutting Tools TMLR100-40ELA Thread Mill 6-40

Product Description

The SCIENTIFIC CUTTING TOOLS TMLR100-40ELA is a helical flute thread mill designed for cutting internal 6-40 UNF threads in a single helical pass. Built from submicron solid carbide and finished with an AlTiN+ coating, this tool delivers high wear resistance and heat tolerance in demanding machining environments. The long-reach design allows access to deeper thread features without sacrificing rigidity. With a 0.1000 inch cutting diameter, 0.4000 inch length of cut, and 3 right-hand flutes, it is suited for precision thread milling on CNC machining centers. Machinists and toolmakers working on small-diameter internal thread applications will find this tool appropriate for ferrous and nonferrous materials.

This thread mill is intended for internal thread milling operations on CNC machining centers capable of helical interpolation. The 6-40 UNF thread standard makes it applicable for fine-pitch fastener holes common in instrument manufacturing, aerospace components, electronics enclosures, and other small-part machining work. The 1/4 inch shank diameter fits standard collets and end mill holders. At 2.5 inches overall length, the long-reach configuration provides clearance for deeper bosses and counterbored features where shorter tools cannot reach.

Key Features

• Submicron solid carbide construction for rigidity and edge retention in small-diameter tooling
• AlTiN+ coating provides elevated temperature resistance and extended tool life in dry or semi-dry cutting conditions
• Long-reach thread mill type allows threading in recessed or deep-bore features
• 3 right-hand helical flutes for smooth chip evacuation during internal thread milling
• 40 teeth per inch UNF thread form for fine-pitch internal threads
• No coolant-through design keeps tool construction simple for standard toolholder setups

Compatibility

Designed for CNC machining centers with helical interpolation capability, using standard 1/4 inch collet or end mill holders for internal 6-40 UNF thread milling applications.

Installation Notes

This tool is installed and used by machinists on CNC machining centers. Secure the 1/4 inch shank in a properly sized collet or end mill holder and verify runout before use, as small-diameter carbide thread mills are sensitive to excessive runout. Program helical interpolation at the correct thread pitch and cutting diameter offset per the thread mill manufacturer guidelines. Handle solid carbide tooling with care to avoid chipping the cutting edges during setup and storage.