Scientific Cutting Tools TM235-24H Thread Mill 5/16-24 Unf

Product Description

The SCIENTIFIC CUTTING TOOLS TM235-24H is a solid carbide helical flute thread mill designed for cutting 5/16-24 UNF threads in both internal and external configurations. Built from submicron-grade carbide with a bright/uncoated finish, it delivers clean thread forms in a single helical pass. The tool runs a 0.235-inch cutting diameter on a 0.25-inch shank, with a 0.684-inch length of cut and a 2.5-inch overall length. Machinists and tool-and-die professionals use this type of tool on CNC machining centers where a single cutter must handle both thread directions without a tool change.

This thread mill suits production and job-shop environments running UNF threaded features in steel, aluminum, and similar machinable materials. It is appropriate for applications where thread milling is preferred over tapping, such as blind holes with minimal thread runout, hard materials, or situations requiring the same tool to cut both internal bores and external bosses. The right-hand flute direction and 3-flute geometry support balanced cutting forces and predictable chip evacuation at typical thread milling feeds and speeds.

Key Features

• Cuts 5/16-24 UNF threads at 24 teeth per inch in both internal and external orientations
• Submicron-grade solid carbide construction for rigidity and edge retention
• 3-flute, right-hand helical geometry promotes chip flow and balanced radial load
• 0.235-inch cutting diameter with 0.684-inch length of cut suits typical 5/16 thread depths
• Bright/uncoated finish - compatible with a wide range of cutting fluids and workpiece materials
• No coolant-through requirement simplifies setup on standard CNC machining centers

Compatibility

Designed as an OEM-style thread milling solution for CNC machining centers accepting a 0.25-inch straight shank, used wherever 5/16-24 UNF thread milling capability is required in internal or external applications.

Installation Notes

Installation and operation should be performed by a qualified machinist on a CNC machining center with helical interpolation capability. Secure the 0.25-inch shank in a precision collet or end mill holder and verify runout before cutting. Always confirm spindle speed, feed rate, and helical pitch are programmed to match the 5/16-24 UNF thread specification before the first pass. Do not use this tool in a manual drill press or with axial-only feed motion.