Scientific Cutting Tools TMI285-16HA Thread Mill 3/8-16

Product Description

The SCIENTIFIC CUTTING TOOLS TMI285-16HA is a solid carbide helical flute thread mill designed for cutting internal 3/8-16 UNC threads in a CNC machining environment. Built from submicron-grade carbide and coated with AlTiN+, it handles demanding materials and elevated cutting temperatures without rapid wear. The 4-flute, right-hand configuration with a 0.285 inch cutting diameter and 0.775 inch length of cut allows a single tool to mill a full internal thread profile in one helical interpolation pass. Overall length is 3.0 inches with a 5/16 inch shank diameter. This tool is installed and operated by machinists and CNC programmers running mill-turn or vertical machining centers.

This thread mill is suited for production and job-shop environments where interpolated threading is preferred over rigid tapping. The long-reach design makes it practical for threading holes where axial clearance is limited or where a tapping tool would risk breakage. It produces 3/8-16 UNC internal threads at 16 teeth per inch and is appropriate for use in ferrous and non-ferrous workpiece materials. Typical applications include threaded hole repair, through-hole threading, and situations where one tool must cover a range of thread depths in a single setup.

Key Features

• Solid submicron-grade carbide construction for rigidity and wear resistance
• AlTiN+ coating extends tool life in high-temperature cutting conditions
• 4-flute helical geometry for smooth chip evacuation during interpolation
• Long-reach design at 3.0 inches OAL improves access in confined bore geometries
• Right-hand flute direction compatible with standard CNC helical interpolation routines
• No coolant-through requirement simplifies setup on machines without high-pressure coolant

Compatibility

Designed for CNC machining centers capable of helical interpolation, producing internal 3/8-16 UNC threads with a 5/16 inch shank toolholder interface.

Installation Notes

This tool is installed and programmed by qualified CNC machinists. Secure the 5/16 inch shank in a correctly sized collet or end mill holder and verify runout before cutting. Program a helical interpolation path matched to the 3/8-16 UNC thread pitch; do not attempt to use this tool as a rigid tap. Confirm spindle speed and feed rate against the manufacturer cutting data for the workpiece material before the first pass.