Scientific Cutting Tools SPTM182 Thread Mill 18-56 Tpi

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM182 is a solid carbide single profile thread mill designed to cut both internal and external threads across a wide range from 1/4-18 to 1/4-56, covering 18 to 56 TPI. Built from submicron-grade carbide with a bright, uncoated finish, it delivers precise thread geometry on a variety of materials. The four-flute design provides efficient chip evacuation and stable cutting performance. With a 0.182-inch cutting diameter and a 1/4-inch shank, this tool is sized for CNC machining centers and thread-milling operations where a single tool must handle multiple thread pitches in one setup.

This thread mill is suited for job shops, production machining, and toolroom applications where thread versatility is essential. Its ability to produce both internal and external threads with a single tool reduces tooling inventory and changeover time. The 0.400-inch length of cut and 0.104-inch neck diameter allow access into tighter bores and blind holes typical of precision components. It is commonly used in aerospace, medical, and general metalworking environments where thread quality and dimensional accuracy are critical.

Key Features

• Covers 18 to 56 TPI in a single tool, eliminating the need for multiple thread mills across common pitch ranges
• Cuts both internal and external threads, reducing tooling inventory and setup changes
• Submicron-grade solid carbide construction provides hardness and wear resistance for consistent thread quality
• Four-flute geometry supports efficient chip evacuation and smooth cutting action
• Bright, uncoated finish is compatible with a wide range of workpiece materials and cutting fluids
• Reduced neck diameter of 0.104 inches allows access to tight bore profiles and blind-hole applications

Compatibility

Designed as a single profile thread mill for CNC machining centers capable of helical interpolation, suitable for producing 1/4-inch thread sizes from 18 to 56 TPI in both internal and external configurations.

Installation Notes

Installation and operation should be performed by a qualified machinist or CNC programmer familiar with thread-milling toolpaths and helical interpolation cycles. Secure the 1/4-inch shank in a collet or end mill holder rated for the tool diameter before use. Verify spindle speed, feed rate, and helical pitch settings in the CAM program before running the first part. Never use this tool in a conventional drill or non-interpolating operation, as thread milling requires coordinated three-axis movement.