Accupro C931-12100 Thread Mill Internal 4 Flute M12 X 1.00

Product Description

The ACCUPRO C931-12100 is a solid carbide helical flute thread mill designed for cutting internal threads in a single helical pass. It produces M12 x 1.00 metric fine threads using a 4-flute, right-hand cutting geometry with a TiAlN coating for heat and wear resistance. The cutting diameter is 0.37 inches (9.40 mm) with a shank diameter of 0.375 inches (10.00 mm). Micrograin carbide substrate supports higher cutting speeds and longer tool life compared to standard carbide grades. This tool is used by machinists and toolroom operators on CNC machining centers capable of helical interpolation.

This thread mill is suited for internal threading applications in ferrous and non-ferrous materials where a single tool must produce a complete thread form. The M12 x 1.00 metric fine thread profile and 0.8752-inch length of cut support through-hole and blind-hole applications with adequate reach. The minimum nominal thread diameter is 0.4724 inches (12.00 mm), making it appropriate for M12 tapped holes in production and prototype machining environments. Coolant-through is not supported; external flood or mist coolant is recommended for chip evacuation.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention
• TiAlN coating reduces heat buildup and extends tool life in ferrous materials
• 4-flute helical geometry enables full thread form in a single helical interpolation pass
• Right-hand flute direction compatible with standard CNC machining center spindle rotation
• 0.37-inch cutting diameter and 0.8752-inch length of cut for M12 x 1.00 internal threads
• No coolant-through requirement simplifies setup on machines without high-pressure coolant

Compatibility

Designed for CNC machining centers capable of helical interpolation programmed to M12 x 1.00 metric fine thread specifications. Requires a tool holder accepting a 0.375-inch (10.00 mm) round shank.

Installation Notes

Installation and operation of this tool requires a licensed or qualified machinist familiar with CNC helical interpolation programming. Confirm spindle speed, feed rate, and helical pitch are programmed to match the M12 x 1.00 thread specification before running. Secure the shank fully in a precision collet or end mill holder to minimize runout. Never use this tool in a manual drill press or non-interpolating machine — it is not designed for axial drilling operations.