Scientific Cutting Tools Tmc 740-12 Thread Mill 1-12 Unf

Product Description

The SCIENTIFIC CUTTING TOOLS TMC 740-12 is a straight flute thread mill designed for cutting internal UNF threads at a 1-12 pitch in a single helical pass. Built from submicron-grade solid carbide, the tool delivers the rigidity and edge retention required for threading operations in ferrous and non-ferrous materials. It runs a 0.74-inch cutting diameter with a 1.08-inch length of cut, giving technicians and machinists adequate reach for standard-depth threaded bores. The bright, uncoated finish suits general-purpose applications where coating is not required by the workpiece material. Four straight flutes support chip evacuation in typical CNC machining center setups.

This thread mill is used in CNC machining environments where a single tool must produce a complete internal thread form without a dedicated tap. It is suited for job shops, production machining, and maintenance repair operations requiring 1-12 UNF internal threads. The 3/4-inch shank interfaces directly with standard ER or end mill holders. At 6 inches overall length, the tool accommodates setups where moderate reach from the spindle face is needed. Coolant-through is not supported, so external or flood coolant is the standard approach during operation.

Key Features

• Submicron-grade solid carbide construction for edge retention and tool rigidity
• Straight flute geometry with 4 flutes for controlled chip flow on internal thread forms
• Cuts 1-12 UNF internal threads with a 0.74-inch cutting diameter
• 1.08-inch length of cut supports standard-depth threaded bores
• Bright uncoated finish for general-purpose threading applications
• 3/4-inch shank diameter compatible with standard CNC toolholders

Compatibility

Designed for use in CNC machining centers capable of helical interpolation; fits standard 3/4-inch ER collet chucks and end mill holders used in production and job shop threading operations.

Installation Notes

Installation and operation should be performed by a qualified machinist or CNC programmer familiar with thread milling cycles and helical interpolation. Ensure the spindle is fully stopped and the machine is in a safe state before loading or changing the tool. Verify holder runout and tool projection before initiating a threading cycle, as excessive runout will affect thread quality. Apply flood or external mist coolant directed at the cutting zone; this tool does not support coolant-through delivery.