Scientific Cutting Tools TM290-16A Thread Mill 3/8-16

Product Description

The SCIENTIFIC CUTTING TOOLS TM290-16A is a straight flute thread mill designed for cutting internal 3/8-16 UNC threads in a single helical pass. Built from submicron-grade solid carbide and coated with AlTiN+, it delivers consistent thread form and extended tool life in ferrous and high-hardness workpiece materials. With 4 flutes, a 0.290-inch cutting diameter, and a 0.775-inch length of cut, this tool is suited for CNC machining centers running rigid tapping or helical interpolation cycles. It is installed and operated by machinists and CNC programmers working in production, job shop, or toolroom environments.

This thread mill is configured for internal UNC thread applications at 16 teeth per inch. The 5/16-inch shank diameter and 3.5-inch overall length make it compatible with standard ER or shrink-fit toolholders on vertical and horizontal machining centers. It is a practical choice for shops threading blind holes, through-holes, or materials where tap breakage is a concern. No coolant-through capability is present, so flood or mist coolant delivery at the spindle is the appropriate approach for chip evacuation and heat management.

Key Features

• Straight flute geometry optimized for internal 3/8-16 UNC thread milling
• Submicron-grade solid carbide substrate for wear resistance and rigidity
• AlTiN+ coating for elevated-temperature performance and extended tool life
• 4 flutes with 16 teeth per inch for clean thread form and smooth cutting action
• 0.775-inch length of cut accommodates a range of thread depths in a single pass
• Non-staggered tooth configuration for straightforward programming and predictable chip load

Compatibility

Designed as an OEM-style thread milling tool for internal 3/8-16 UNC applications on CNC machining centers equipped with helical interpolation. Accepts standard toolholders sized for a 5/16-inch shank diameter.

Installation Notes

This tool is installed and run by machinists on CNC machining centers; do not attempt use on manual mills or drill presses. Secure the shank in a balanced, runout-minimized toolholder - excessive runout will degrade thread quality and reduce tool life. Program the helical interpolation cycle to match the 3/8-16 UNC pitch before spindle engagement. Apply flood or mist coolant externally, as this tool does not have coolant-through capability.