Scientific Cutting Tools TM370-18EXJ-A Thread Mill 18 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS TM370-18EXJ-A is a straight flute thread mill designed for cutting external UNJ threads at 18 teeth per inch. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, this tool delivers high wear resistance and thermal stability in demanding machining environments. With 5 flutes, a 0.37 inch cutting diameter, and a 0.80 inch length of cut, it is engineered for precision thread milling in materials where tool life and dimensional accuracy are critical. It accepts a 3/8 inch shank and measures 3.5 inches in overall length. This tool is used by machinists and CNC operators in aerospace, defense, and precision manufacturing applications.

This thread mill is suited for external UNJ thread forms at 18 TPI in CNC machining center operations. It is appropriate for applications requiring tight thread tolerances and surface finish control, including aerospace-standard fastener bores and precision mechanical assemblies. The straight flute geometry and solid carbide construction make it a reliable choice for short-chipping materials and stable cutting conditions. It does not feature coolant-through capability or staggered tooth geometry.

Key Features

• External UNJ thread form at 18 TPI for aerospace-standard thread profiles
• Submicron-grade solid carbide substrate for rigidity and wear resistance
• AlTiN+ coating provides high-temperature and oxidation resistance
• 5 straight flutes for stable, controlled thread milling
• 0.37 inch cutting diameter with 0.80 inch length of cut
• 3/8 inch shank diameter compatible with standard CNC tool holders

Compatibility

Designed for CNC machining centers capable of helical interpolation, used to produce external UNJ thread forms at 18 TPI with a 3/8 inch shank interface.

Installation Notes

Thread mills of this type are installed by machinists into CNC tool holders using appropriate collets or end mill holders rated for the 3/8 inch shank diameter. Verify spindle speed, feed rate, and helical interpolation parameters in the CAM program before cutting. Inspect the cutting edges and coating condition before each use. Follow all machine guarding and PPE requirements per shop safety protocols.