Scientific Cutting Tools Tm 400-32 Thread Mill 1/2-32

Product Description

The SCIENTIFIC CUTTING TOOLS TM 400-32 is a straight flute internal thread mill designed for cutting 1/2-32 UNS threads in a single helical pass. Built from submicron-grade solid carbide, it delivers the rigidity and wear resistance required for precision thread milling in ferrous and non-ferrous materials. The tool features 4 flutes, a 0.4 inch cutting diameter, and 1.077 inches length of cut, making it well suited for producing clean internal threads in confined bores. The bright, uncoated finish is appropriate for applications where coating buildup or thermal reactivity is a concern. This tool is installed and operated by machinists and toolroom technicians on CNC machining centers.

The TM 400-32 is used in CNC thread milling operations where a single-point tap cannot be used or where thread quality demands tighter control. With 32 teeth per inch and a 1/2 inch minimum nominal diameter, it targets fine-pitch internal thread production in workpieces requiring UNS thread standards. It is a practical choice for shops producing parts in low to medium volumes where thread milling offers advantages over tapping, including better tool life and the ability to mill multiple thread sizes with one tool setup.

Key Features

• Submicron-grade solid carbide construction for high rigidity and edge retention
• Straight flute geometry with 4 flutes for stable, repeatable thread milling passes
• Cuts 1/2-32 UNS internal threads with 32 TPI
• Bright uncoated finish suitable for a broad range of workpiece materials
• 1/2 inch shank diameter for standard ER or milling chuck toolholders
• 3.5 inch overall length accommodates standard spindle projection setups

Compatibility

Designed for CNC machining centers capable of helical interpolation; intended for producing 1/2-32 UNS internal threads with a minimum nominal bore diameter of 1/2 inch.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation - confirm G-code support before setup. Secure the 1/2 inch shank in a precision ER collet chuck or milling chuck and verify runout before cutting. Never exceed the rated cutting diameter or depth of cut in a single pass. Follow shop safety protocols and machine guarding requirements throughout the operation.