Kennametal 1280494 Indexable Thread Mill 0.67in Cut Dia

Product Description

The KENNAMETAL 1280494 is an indexable thread mill designed for cutting internal and external threads in a single helical interpolation pass. The tool accepts two STN11-style inserts held by screw clamp, giving machinists a fast and repeatable insert-change process without removing the body from the spindle. At 0.67 inches cutting diameter and 3.42 inches overall length, this tool suits CNC machining centers running thread milling cycles in a wide range of materials. Through-coolant delivery is built in, supporting chip evacuation and thermal control at the cutting zone. The neck diameter of 0.537 inches provides clearance for deep-hole approaches up to 1.34 inches maximum hole depth.

This thread mill is suited for job shops, tool rooms, and production machining environments where a single tool must handle both internal and external thread forms. The 0.43-inch insert size and 1/4-inch inscribed circle geometry correspond to the STN11 insert platform, which is commonly stocked for general threading work. Two flutes and through-coolant supply make this tool effective in interrupted cuts, blind holes, and through-hole applications on vertical and horizontal machining centers.

Key Features

• Cuts internal and external threads in one tool platform
• Accepts two STN11 inserts (1/4-inch inscribed circle, 0.43 inches insert size) for quick changeover
• Through-coolant design supports chip evacuation and edge life in deep-thread applications
• Screw-clamp insert holding method for secure, repeatable seating
• Toolholder style K067 with 0.537-inch neck diameter for clearance in tight-bore entries
• Maximum hole depth of 1.34 inches accommodates typical fastener and fitting thread depths

Compatibility

Designed as an OEM-style indexable thread milling body compatible with STN11-platform inserts in the K067 toolholder style. Consult KENNAMETAL insert selection guides for compatible insert grades and coatings for your workpiece material.

Installation Notes

Thread milling requires a CNC machining center with helical interpolation capability; verify control support before programming. Ensure coolant supply lines are clear and through-coolant pressure is set per machine specifications before engaging the cut. Power down the spindle and confirm it is at rest before performing any insert change or torque-down of clamping screws. Follow the machine tool builder guidelines and applicable shop safety procedures when handling indexable cutting tools.