Kennametal 1094859 Indexable Boring Bar 2-3/4 in Right Hand

Product Description

The KENNAMETAL 1094859 is an indexable boring bar in the Top Notch series, designed for precision internal turning and boring operations in metal cutting applications. Built on an A-NE toolholder style with a 2-inch shank diameter, this bar accepts N. style inserts held in place by a clamp-style insert retention method. The minimum bore diameter is 2.75 inches and the overall length is 16 inches, making it suited for deep bore work where reach and rigidity are critical. Coolant-through capability with a 1/4-18 NPT coolant hole thread supports chip evacuation and thermal control at the cutting zone. The steel construction provides the stiffness required for consistent tool life at high material removal rates. Licensed machinists and CNC operators typically specify this bar for production turning on horizontal or vertical lathes.

This boring bar is configured for right-hand cutting and carries a 3-degree lead angle with a center-to-cutting-edge dimension of 1.375 inches. It is used in production and job shop environments where repeatable bore geometry is required. Typical applications include roughing and finishing of large-diameter bores in steel, cast iron, and similar machinable alloys. The Top Notch series is a well-established insert platform in industrial turning, and this bar is sized for mid-to-large bore work common in aerospace, heavy equipment, and general machining operations.

Key Features

• Minimum bore diameter of 2.75 inches supports mid-to-large internal turning applications
• Coolant-through design with 1/4-18 NPT thread for directed coolant delivery to the cutting edge
• Clamp-style insert retention provides secure seating under high cutting loads
• A-NE toolholder style accepts Top Notch N. series inserts
• Right-hand cut configuration with 3-degree lead angle and 1.375-inch center-to-cutting-edge offset
• Steel shank construction delivers rigidity and vibration damping in deep bore setups

Compatibility

Designed for use with Top Notch series N. style inserts. Insert compatibility is limited to N. insert geometry as specified by KENNAMETAL for the A-NE toolholder style. Specific insert grades and geometries should be selected based on workpiece material and cutting parameters.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be powered down and locked out before mounting or removing the boring bar from the turret or tool block. Verify shank clamping torque per the machine tool manufacturer specification and confirm insert seating and clamp screw engagement before initiating a cut. Coolant-through connections should be checked for proper fitting and line pressure compatibility before operation.