Kennametal 1094739 Indexable Boring Bar 0.600 in Right Hand

Product Description

The KENNAMETAL 1094739 is a steel indexable boring bar in the A-STUN toolholder style, designed for internal turning and boring operations on CNC lathes and turning centers. It features a 1/2-inch shank diameter, an 8-inch overall length, and a minimum bore diameter of 0.600 inches (15.24 mm). The right-hand cutting orientation and -3-degree lead angle suit a wide range of internal bore finishing and roughing applications. Inserts are secured via a screw clamping method, providing consistent repeatability and rigid tool engagement. Coolant-through capability with a 1/16-27 NPT coolant hole thread supports chip evacuation and heat management during deep-bore machining.

This boring bar is suited for use in production and job-shop environments where precise internal diameters are required. It accepts T221P inserts, which are the designated compatible insert style for this holder. The 0.312-inch center-to-cutting-edge dimension and the -3-degree lead angle make it appropriate for close-tolerance boring in steel, cast iron, and similar workpiece materials. Licensed machinists and CNC toolroom technicians are the typical end users for this toolholder.

Key Features

• A-STUN toolholder style with right-hand cut orientation
• Minimum bore diameter of 0.600 inches (15.24 mm)
• Screw-clamp insert holding method for rigid, repeatable insert seating
• Coolant-through design with 1/16-27 NPT coolant port
• Compatible with T221P inserts
• Steel construction for durability in turning center applications

Compatibility

Designed to accept T221P inserts. Toolholder follows the A-STUN style designation. This is not listed as a multi-use tool. Verify insert geometry and grade selection against workpiece material requirements before ordering.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the turret is in a safe index position before mounting or removing the toolholder. Secure the shank in the boring bar block to the machine manufacturer's recommended clamping torque using appropriate toolholder hardware. Confirm coolant line connection to the 1/16-27 NPT port is leak-free before returning the machine to production.