Accupro C911-62511 Thread Mill 5/8-11 Internal Solid Carbide

Product Description

The ACCUPRO C911-62511 is a solid carbide helical flute thread mill designed for cutting internal 5/8-11 UNC threads in machining center applications. Built from micrograin solid carbide and coated with TiAlN, it delivers the hardness and heat resistance needed for threading ferrous and hardened materials at elevated speeds. The tool runs a right-hand flute direction with 4 flutes, a 0.49-inch cutting diameter, and a 1-inch length of cut, making it suited for through and blind-hole internal threading where a tap would present breakage risk. The 1/2-inch shank diameter fits standard ER collet and end mill holders.

This thread mill is used in CNC machining center setups for producing 5/8-11 UNC internal threads in materials including steel, stainless steel, cast iron, and high-temperature alloys. Helical interpolation thread milling allows a single tool to produce the full thread form in one helical pass, offering better chip control and reduced cutting forces compared to solid tapping. It is well suited for production environments where tool breakage risk, thread quality, and hole integrity are priorities. Machinists and CNC programmers working in job shops, aerospace, and general manufacturing will find this tool appropriate for tight-tolerance threading work.

Key Features

• Solid micrograin carbide substrate for rigidity and wear resistance in demanding materials
• TiAlN coating extends tool life in dry and high-speed cutting conditions
• 4-flute helical design produces 5/8-11 UNC internal threads via CNC interpolation
• 0.49-inch cutting diameter with 1-inch length of cut handles standard thread depth requirements
• Right-hand flute direction compatible with standard CNC spindle rotation and canned threading cycles
• No coolant-through design — suitable for external flood or mist coolant delivery

Compatibility

Designed for use in CNC machining centers capable of helical interpolation; fits standard 1/2-inch shank toolholders including ER collet chucks and end mill holders. Cuts 5/8-11 UNC internal thread forms.

Installation Notes

Installation and use require a CNC machining center with helical interpolation capability and a correctly programmed threading cycle. Secure the shank in a balanced, properly torqued toolholder before spindle operation. Confirm workpiece is rigidly fixtured and that the correct interpolation radius and pitch are programmed before running the cycle. Do not use this tool as a tap or in manual drilling equipment.