Scientific Cutting Tools SPTM120ML Thread Mill 8-32 to 8-56

Product Description

The SCIENTIFIC CUTTING TOOLS SPTM120ML is a single profile thread mill engineered for cutting both internal and external threads across a range from 8-32 to 8-56, covering 32 to 56 TPI. Built from submicron-grade solid carbide, this tool delivers the rigidity and edge retention required for precision threading in demanding production environments. The 0.12-inch cutting diameter and 0.07-inch neck diameter allow access to tight geometries and small-diameter bores. With 3 flutes and a bright uncoated finish, it is suited for machinists and toolmakers working in ferrous and non-ferrous materials where sharp edge performance and dimensional accuracy are priorities.

This thread mill is designed for use in CNC machining centers performing small-diameter thread milling operations. The single profile design allows one tool to cover the full 8-32 through 8-56 thread size range in a single setup, reducing tooling inventory. It is applicable to both through-hole and blind-hole threading applications and supports both internal and external thread forms. Typical use cases include precision components in aerospace, medical device manufacturing, electronics, and general machining where fine-pitch threads on small fastener sizes are required.

Key Features

• Covers 8-32 to 8-56 thread range, 32 to 56 TPI, internal and external in one tool
• Submicron-grade solid carbide construction for superior hardness and wear resistance
• 0.12-inch cutting diameter with 0.07-inch neck diameter for access to small-bore thread forms
• 0.40-inch length of cut and 0.40-inch neck length suitable for shallow-to-moderate thread depth applications
• 3-flute geometry balances chip evacuation and cutting stability at small diameters
• Bright/uncoated finish maintains sharp cutting edges and suits a wide range of workpiece materials

Compatibility

Designed as an OEM-style replacement or direct-use single profile thread mill for CNC machining centers accepting a 3/16-inch shank diameter toolholder, targeting applications requiring 8-32 to 8-56 thread sizes.

Installation Notes

Installation and operation should be performed by a qualified machinist or CNC programmer familiar with thread milling cycles. Ensure the toolholder collet is clean and properly torqued to the 3/16-inch shank diameter before running. Verify spindle speed, feed rate, and helical interpolation parameters in the CNC program match the tool diameter and thread pitch before cutting. Do not use this tool in manual milling applications; thread milling requires coordinated CNC axis movement.