Kennametal 1280548 Indexable Thread Mill 1.18in Cut Dia

Product Description

The KENNAMETAL 1280548 is an indexable thread mill designed for cutting internal and external threads in a single operation. It accepts one STN27-style insert secured by a screw-clamp holding method, delivering consistent thread geometry across a cutting diameter of 1.18 inches. With a maximum hole depth of 2.03 inches and through-coolant capability, this tool manages chip evacuation and heat control during threading operations. The K118 toolholder style and a neck diameter of 0.945 inches provide clearance in tighter bore applications. Licensed machinists and CNC programmers use this tool in horizontal and vertical machining centers where thread milling is preferred over tapping.

This thread mill is suited for both internal and external threading applications on machining centers capable of helical interpolation. It works across a range of materials where thread milling offers advantages over tapping, including interrupted cuts, blind holes with minimal thread runout, and applications requiring a single tool to cut multiple thread pitches. Through-coolant delivery supports performance in deeper threading passes up to 2.03 inches. The 1-flute design reduces cutting forces and is appropriate for threading operations in medium to high-strength workpiece materials.

Key Features

• Cuts internal and external threads in a single tool using helical interpolation
• Through-coolant design for active chip evacuation and heat management at the cutting zone
• Accepts one STN27 insert with a 5/8-inch inscribed circle, held by a clamp screw for quick insert changes
• K118 toolholder style with 0.945-inch neck diameter provides bore clearance in tight applications
• 1-flute configuration reduces radial cutting forces during threading passes
• Overall length of 4.38 inches suits standard toolholder projection in most machining centers

Compatibility

Designed for use with STN27-series threading inserts with a 1.06-inch insert size and a 5/8-inch inscribed circle. Verify insert grade and geometry selection against workpiece material and thread specification before use.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the tool changer is in a safe state before mounting or removing the toolholder. Confirm through-coolant passages are clear and that machine coolant pressure is within the range specified by the machining center manufacturer before cutting. Verify helical interpolation programming and thread lead accuracy in the CNC program prior to first article threading.