Scientific Cutting Tools TMI370-18HA Thread Mill 9/16-18 Unf

Product Description

The SCIENTIFIC CUTTING TOOLS TMI370-18HA is a solid carbide helical flute thread mill designed for cutting internal UNF threads in a single helical pass. Built from submicron-grade carbide and finished with an AlTiN+ coating, this tool is engineered for thread milling operations where accuracy and tool life are critical. It produces 9/16-18 UNF internal threads with a cutting diameter of 0.3700 inches and a length of cut of 0.9110 inches. The long-reach design and four-flute configuration make it suitable for CNC machining centers running right-hand thread operations in ferrous and non-ferrous materials.

This thread mill is intended for use in CNC machining environments where internal 9/16-18 UNF threads are required. The long-reach geometry accommodates deeper thread features without tool interference. With a 3/8-inch shank diameter and 3.0000-inch overall length, it fits standard ER or set-screw toolholders used in vertical and horizontal machining centers. Machinists in precision manufacturing, job shops, and production environments will find this tool appropriate for threading operations in materials where AlTiN+ coating provides thermal and wear resistance.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance
• AlTiN+ coating for elevated temperature resistance and extended tool life
• 4-flute helical configuration for right-hand internal thread milling
• Long-reach design suited to deeper internal thread features
• Cuts 9/16-18 UNF threads with a 0.3700-inch cutting diameter
• No coolant-through requirement simplifies toolholder selection

Compatibility

Designed for CNC machining centers capable of helical interpolation; compatible with standard 3/8-inch shank toolholders. Suitable for producing internal 9/16-18 UNF threads per thread standard requirements.

Installation Notes

Thread mills must be installed in a CNC machining center capable of helical interpolation - do not use in conventional drill presses or manual mills. Secure the 3/8-inch shank fully in a balanced toolholder and verify runout before production cuts. Confirm spindle speed and feed rate are programmed per the thread mill helix path, not standard tapping values. Inspect the tool edge condition before each run, as carbide tools can chip if dropped or mishandled during setup.