Scientific Cutting Tools Tm 345-18 Thread Mill 7/16-18

Product Description

The SCIENTIFIC CUTTING TOOLS TM 345-18 is a straight flute internal thread mill ground from solid submicron carbide and designed to cut 7/16-18 UNS threads in a single helical pass. With 4 flutes, a 0.345-inch cutting diameter, and 18 teeth per inch, it delivers clean thread forms in ferrous and non-ferrous materials where tap breakage is a concern or blind-hole access requires a more controlled approach. The bright finish keeps the tool free of additional coatings for applications where dimensional tolerance is tight. Machinists and tool-and-die professionals use this mill in CNC machining centers equipped with three-axis helical interpolation capability.

This tool is suited for internal threading operations in production and job-shop environments where 7/16-18 UNS thread profiles are required. The 3/8-inch shank diameter fits standard ER and end mill collet systems, making it compatible with a wide range of machining center spindles. The 0.8-inch length of cut accommodates a range of thread depths without excessive overhang. No coolant-through capability is featured, so flood or mist coolant delivery at the spindle exterior is the standard approach for chip evacuation and heat management.

Key Features

• Cuts 7/16-18 UNS internal threads via helical interpolation on three-axis CNC machining centers
• Solid submicron carbide construction for rigidity and wear resistance
• 4 straight flutes with 18 teeth per inch for consistent thread form engagement
• 0.345-inch cutting diameter with 0.8-inch length of cut for versatile thread depth range
• 3/8-inch shank diameter fits standard collet toolholders
• Bright finish with no additional coating for close dimensional control

Compatibility

Designed for use in CNC machining centers capable of three-axis helical interpolation for cutting 7/16-18 UNS internal threads. Compatible with standard ER and end mill collet systems accepting a 3/8-inch shank diameter.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with CNC thread milling routines and helical interpolation programming. Secure the shank fully within the collet to the recommended grip depth before tightening. Power down the spindle and verify zero spindle speed before tool changes. Do not use this tool on manual mills or in applications requiring straight-plunge threading.