Kennametal 1280546 Indexable Thread Mill 1.18in Internal External

Product Description

The KENNAMETAL 1280546 is an indexable thread mill designed for cutting internal and external threads in metalworking applications. With a 1.18-inch cutting diameter and a maximum hole depth of 3.53 inches, this tool handles a wide range of threading tasks on CNC machining centers. It accepts a single STN27-style insert secured by screw, and features through-coolant capability to manage heat and chip evacuation during high-speed operation. The toolholder style is K118, with a neck diameter of 0.9450 inches and an overall length of 5.88 inches. Right-hand cutting direction is standard. Machinists and tooling specialists working in job shops, production facilities, or aerospace and industrial manufacturing environments are the primary users.

This thread mill is suited for both internal and external thread milling operations on a variety of materials. Its single-flute design with a 5/8-inch insert inscribed circle and STN27 insert style makes it compatible with precision threading operations where tool rigidity and controlled chip load are critical. The through-coolant feature supports deeper threading operations, particularly in ferrous and non-ferrous metals where thermal management directly affects thread quality and tool life.

Key Features

• 1.18-inch cutting diameter for mid-range thread milling applications
• 3.53-inch maximum hole depth supports deeper threading operations
• Through-coolant design aids chip evacuation and thermal control
• Single STN27 insert secured by screw for quick, repeatable indexing
• K118 toolholder style with 0.9450-inch neck diameter for clearance in tight bores
• Right-hand cutting direction, suitable for standard CNC threading cycles
• Internal and external thread capability in a single tool body

Compatibility

Designed for use with STN27-style threading inserts with a 5/8-inch inscribed circle. Toolholder style is K118. Verify insert and holder compatibility with KENNAMETAL tooling references before ordering.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC tooling technician. Ensure the spindle is fully stopped and the machine is in a safe state before changing inserts or mounting the tool. Follow the machine tool manufacturer's torque specifications for screw-clamped inserts. Confirm through-coolant connections are clear and properly routed before running the tool at operating speeds.