Scientific Cutting Tools TM140-32 Thread Mill 10-32 Unf

Product Description

The SCIENTIFIC CUTTING TOOLS TM140-32 is a straight flute thread mill designed for cutting internal threads in the 10 to 32 UNF specification. Built from submicron-grade solid carbide, it delivers consistent thread geometry and edge retention in ferrous and non-ferrous materials. The tool features 3 flutes, a 0.14 inch cutting diameter, and a 0.388 inch length of cut, making it suited for threading shallow blind holes and through-hole applications where tight pitch accuracy is required. The bright finish reduces built-up edge and supports chip evacuation in close-tolerance work.

This thread mill is used in CNC machining centers for producing internal UNF threads starting at the No. 10 minimum nominal diameter. It is applicable in precision manufacturing environments including aerospace, automotive, and general metalworking shops where thread milling is preferred over tapping for improved thread quality, tool life, or access in hardened or difficult-to-tap materials. The 1/4 inch shank diameter fits standard ER and end mill collet toolholding systems common in vertical and horizontal machining centers.

Key Features

• Submicron-grade solid carbide construction for extended tool life and edge stability
• 3 straight flutes with bright finish for reduced friction and chip buildup
• Cuts internal 10 to 32 UNF threads in a single helical interpolation pass
• 0.14 inch cutting diameter with 0.388 inch length of cut for shallow-hole applications
• 1/4 inch shank diameter for compatibility with standard collet toolholding
• No coolant-through design; suitable for flood or mist coolant delivery externally

Compatibility

Designed for use in CNC machining centers capable of helical interpolation. Produces internal UNF threads for the No. 10 to 32 thread size range. Compatible with standard 1/4 inch ER collet chucks and end mill holders.

Installation Notes

Thread milling requires a CNC control capable of helical interpolation; confirm program compatibility before setup. Secure the shank fully in a collet or end mill holder to the recommended grip depth to minimize runout. Ensure the workpiece is rigidly fixtured, as deflection under cutting load will affect thread pitch diameter accuracy. Follow shop-standard feeds, speeds, and depth-of-cut parameters for solid carbide thread mills in the workpiece material being machined.