Scientific Cutting Tools SPTM290L Thread Mill 14-40 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM290L is a single profile thread mill designed to cut both internal and external threads in the 3/8-14 to 3/8-40 range, covering 14 to 40 TPI. Built from submicron solid carbide with a bright/uncoated finish, this tool delivers consistent thread geometry across a broad pitch range without a coating that could affect dimensional accuracy on fine threads. The 4-flute geometry supports efficient chip evacuation and stable cutting action. With a 0.29-inch cutting diameter and a 3/8-inch shank, it mounts directly in standard end mill holders or collet chucks on CNC machining centers. Machinists and tool-and-die professionals rely on single profile mills like the SPTM290L for their flexibility across multiple thread sizes with a single tool.

The SPTM290L is suited for CNC thread milling operations on both ferrous and non-ferrous materials where a single tool must handle multiple thread pitches in one setup. Its 1-inch length of cut accommodates typical thread depths encountered in general machining, mold work, and fixture fabrication. The 0.192-inch neck diameter provides clearance for deep-reach thread milling applications while keeping the tool rigid enough for stable interpolation. This tool is appropriate for job shops, production machining environments, and precision toolrooms requiring internal and external thread capability from one holder position.

Key Features

• Cuts internal and external threads from 14 to 40 TPI with a single tool
• Submicron solid carbide construction for wear resistance and dimensional stability
• 4-flute design promotes chip evacuation during helical interpolation
• 0.192-inch neck diameter provides clearance for deep-reach thread milling
• Bright/uncoated finish maintains close dimensional tolerances on fine-pitch threads
• 3/8-inch shank fits standard collet chucks and end mill holders

Compatibility

Designed for use in CNC machining centers capable of helical interpolation; fits standard 3/8-inch collet chucks and end mill holders used in general-purpose thread milling setups.

Installation Notes

Thread milling requires a CNC control with helical interpolation capability - confirm control compatibility before setup. Secure the shank fully in a collet or end mill holder to the manufacturer-recommended engagement depth, and verify runout before cutting. Power down the spindle and follow lockout/tagout procedures when changing or inspecting the tool. Program thread depth and pitch per the workpiece specification; do not extrapolate cutting parameters beyond the tool's stated TPI range.