Scientific Cutting Tools SPTM182L Thread Mill 18-56 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM182L is a single profile thread mill designed to cut both internal and external threads across a wide range per-inch range of 18 to 56 TPI, covering thread sizes from 1/4-18 to 1/4-56. Constructed from submicron solid carbide, this tool delivers consistent edge integrity across the full length of cut. With a cutting diameter of 0.182 inches, a neck diameter of 0.104 inches, and a 0.65-inch length of cut, it is built for precision threading operations in CNC machining centers. It ships with a bright uncoated finish and a 4-flute geometry suited to a range of workpiece materials.

This thread mill is intended for use in CNC milling applications where a single tool must produce multiple thread pitches on a single part or across a production run. The 1/4-inch shank fits standard ER and shrink-fit toolholders common on vertical and horizontal machining centers. Its combined internal and external threading capability reduces tool changes in jobs requiring both thread types. Machinists working in job shops, aerospace component production, and precision manufacturing will find this tool well suited to tight-tolerance threading in ferrous and non-ferrous materials.

Key Features

• Single profile design handles 18 to 56 TPI in one tool, reducing tooling inventory
• Cuts both internal and external threads without a tool change
• Submicron solid carbide grade provides high hardness and wear resistance
• 4-flute geometry for balanced cutting and improved chip evacuation
• Bright uncoated finish compatible with a wide range of cutting fluids and materials
• 0.104-inch neck diameter provides clearance in blind-hole threading applications

Compatibility

Designed for CNC machining centers using a 1/4-inch shank toolholder; compatible with thread sizes from 1/4-18 to 1/4-56 in both internal and external threading applications.

Installation Notes

This tool is installed by a machinist or CNC setup technician into a 1/4-inch collet or shrink-fit toolholder; confirm runout is within acceptable tolerance before threading operations begin. Program thread milling cycles using the correct helical interpolation path for the target thread pitch and direction. Do not use this tool in a manual drill press or non-CNC setup. Always follow shop safety protocols and machine manufacturer guidelines when setting tool offsets and feeds.