Carmex MTSH0250C4224UN Indexable Thread Mill 24 Pitch Un

Product Description

The CARMEX MTSH0250C4224UN is an indexable thread mill designed for milling internal and external threads in a wide range of materials. It features a 0.138-inch cutting diameter paired with a 1/4-inch shank diameter and a 2.5-inch overall length, making it well-suited for threading operations in tight bores and confined workspaces. The tool cuts a 24-pitch UN thread form and is built for use in CNC machining centers where repeatability and insert changeability reduce downtime. Machinists and tool-and-die professionals who need consistent thread geometry without dedicated single-purpose taps will find this format efficient for low-to-medium volume runs.

This thread mill fits into standard milling operations on CNC machining centers running UN-thread specifications. The 24-pitch designation covers fine-thread applications common in precision mechanical assemblies, instrumentation, and tight-tolerance fastener work. The compact 0.138-inch cutting diameter allows entry into small-diameter bores where full-profile thread mills with larger shanks cannot reach. This tool does not require coolant-through capability, making it compatible with a broad range of standard spindle setups without special coolant adapters.

Key Features

• 0.138-inch cutting diameter for threading in small-bore and tight-clearance applications
• 1/4-inch shank diameter fits standard collets and tool holders on CNC machining centers
• 2.5-inch overall length provides reach while maintaining rigidity in the spindle
• 24-pitch UN thread form for fine-thread precision machining applications
• Maximum cutting length of 0.42 inches supports thread depth requirements in typical fastener engagement zones
• No coolant-through requirement simplifies setup and broadens compatible spindle types

Compatibility

Designed as an indexable thread mill for CNC machining center applications requiring a 1/4-inch shank and 24-pitch UN thread form milling capability.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or CNC operator familiar with thread milling cycles and toolpath programming. Ensure the spindle is fully stopped and the machine is in a safe state before loading or unloading the tool from the holder. Verify collet or tool holder runout is within acceptable limits before beginning a thread milling operation, as excessive runout directly affects thread quality. Follow the machine tool manufacturer guidelines and applicable shop safety procedures when setting tool offsets and cutting parameters.