Kennametal 2408526 Indexable Boring Bar 3.03in Right Hand

Product Description

The KENNAMETAL 2408526 is a right-hand indexable boring bar designed for internal turning and boring operations in metalworking and machining applications. Built on the Kenclamp series platform, it accepts CN.. style inserts with a 1/2-inch inscribed circle and uses a clamp-style insert holding method with a negative rake angle of 5 degrees. The shank diameter is 2-1/2 inches with an overall length of 16 inches, making it suited for deep bore applications requiring rigidity and reach. Through-coolant capability is standard via a 1/4-18 NPT coolant hole, supporting chip evacuation and thermal control at the cutting edge. The bar is constructed of steel and carries a -5 degree lead angle.

This boring bar is used in production and job-shop environments on CNC lathes and boring mills where precise internal diameter finishing or roughing is required. With a minimum bore diameter of 3.03 inches, it is appropriate for medium-to-large bore work on steel, cast iron, and similar workpiece materials. The through-coolant feature makes it especially useful in high-speed operations or when machining difficult-to-cut alloys where heat and chip management are critical. Licensed machinists and CNC operators working in industrial manufacturing, toolroom, or maintenance-repair-overhaul settings are the primary users of this toolholder.

Key Features

• Minimum bore diameter of 3.03 inches for medium-to-large internal turning applications
• Through-coolant design with 1/4-18 NPT coolant hole thread for improved chip control and tool life
• Clamp-style insert holding method provides secure seating under heavy cutting loads
• Negative rake geometry at 5 degrees suits interrupted cuts and hard materials
• Center to cutting edge dimension of 1.531 inches for predictable offset setup
• Steel construction for rigidity and vibration resistance in deep-reach boring

Compatibility

Designed to accept CN.. style indexable inserts with a 1/2-inch inscribed circle and 3/16-inch insert thickness, following the A-DCLN-KC toolholder style designation.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state before mounting or removing the boring bar. Confirm shank bore fit and torque set screws or clamp hardware per the machine tool manufacturer specifications. Connect the coolant line to the 1/4-18 NPT port only after verifying thread compatibility with the coolant delivery system to avoid leaks during operation.