Accupro C931-12175 Internal Thread Mill M12 X 1.75

Product Description

The ACCUPRO C931-12175 is a solid carbide helical flute thread mill designed for cutting internal metric coarse threads in precision machining applications. The tool features 4 right-hand flutes and a TiAlN coating for improved heat and wear resistance. It carries a 3/8 inch (10.00 mm) shank diameter and a cutting diameter of 0.37 inches (9.40 mm), with a length of cut of 0.875 inches (22.75 mm). Built from micrograin solid carbide, it is suited for high-speed CNC milling operations where thread accuracy and tool life are critical priorities. Machinists and CNC operators working in job shop or production environments are the primary users.

This thread mill is configured for M12 x 1.75 metric coarse internal threads, making it appropriate for threading operations in ferrous and non-ferrous workpieces where a single tool must produce a finished thread form in one helical interpolation pass. The 0.875 inch length of cut accommodates standard thread engagement depths for M12 fastener applications. The overall length of 89.00 mm provides adequate clearance for most vertical and horizontal machining center setups. No coolant-through capability is present, so flood or mist coolant delivery from the exterior is standard practice for this tool.

Key Features

• M12 x 1.75 metric coarse thread form, internal configuration
• 4 helical right-hand flutes for efficient chip evacuation during thread milling
• TiAlN coating for elevated heat resistance and extended tool life
• Micrograin solid carbide substrate for rigidity and edge retention
• 0.37 inch cutting diameter with 0.875 inch length of cut
• 3/8 inch shank diameter with a tolerance of 0.0003 inches for accurate tool holding

Compatibility

Designed for use in CNC machining centers capable of helical interpolation; suited for producing M12 x 1.75 metric coarse internal threads with a minimum nominal bore diameter of 0.4724 inches (12.00 mm).

Installation Notes

Installation is performed by a machinist or CNC setup technician using a standard collet or end mill holder sized for a 3/8 inch shank. Confirm runout at the holder before cutting, as excessive runout will affect thread quality and tool life. Program the CNC control for helical interpolation at the correct pitch and cutting diameter offset. Because this tool has no coolant-through capability, direct external coolant or mist at the cutting zone throughout the operation.