Kennametal 1280476 Indexable Thread Mill 0.354 in

Product Description

The KENNAMETAL 1280476 is an indexable thread mill designed for cutting both internal and external threads on machined components. It accepts a single STN10-style insert held by screw and delivers through-coolant capability to manage heat and chip evacuation at the cutting zone. The tool has a cutting diameter of 0.354 inches, a neck diameter of 0.264 inches, and a maximum hole depth of 0.47 inches. Overall length is 2.72 inches. The toolholder style is K035. This thread mill is used by machinists and tooling specialists in CNC milling environments where precise thread forms are required in a single helical pass.

This tool is suited for shops running both internal and external threading operations on CNC machining centers. Its compact neck geometry allows access to tighter bore profiles while the through-coolant design helps maintain tool life in harder materials and high-cycle production runs. The single-insert design makes insert changes straightforward, reducing downtime during production. It is appropriate for use in job shops, aerospace, automotive, and general metalworking environments where indexable tooling is preferred over solid carbide thread mills for cost-per-edge efficiency.

Key Features

• Cuts both internal and external thread forms in a single tool
• Through-coolant design improves chip evacuation and extends insert life
• Single STN10 insert secured by screw for fast, repeatable indexing
• Neck diameter of 0.264 inches enables access to confined bore geometries
• K035 toolholder style for compatibility with matching insert grades and geometries
• Insert inscribed circle of 15/64 inch (0.41 inches) for defined depth of cut

Compatibility

Designed for use with STN10-style threading inserts. Compatible insert inscribed circle is 15/64 inch. Toolholder style is K035. Consult KENNAMETAL insert selection guides for compatible insert grades and coatings appropriate to the workpiece material.

Installation Notes

Installation and operation of this thread mill should be performed by a qualified machinist or CNC tooling technician. Ensure the spindle is fully stopped and machine is in a safe state before changing inserts or setting tool offsets. Verify through-coolant passages are clear and coolant pressure is within the machine specification before running. Follow the machine tool manufacturer guidelines and applicable shop safety procedures when programming the helical interpolation toolpath.