Kennametal 1152612 Indexable Boring Bar E-stun Right Hand

Product Description

The KENNAMETAL 1152612 is a right-hand indexable boring bar designed for precision internal turning and boring operations on CNC lathes and machining centers. Built from solid carbide, this E-STUN style toolholder accepts T221P inserts secured by a screw-clamp holding method, delivering rigid, repeatable cutting performance. The bar features through-coolant delivery via a 0.125-inch coolant hole, keeping cutting temperatures controlled and extending insert life during deep-bore applications. With a minimum bore diameter of 12.19 mm (0.480 inches) and an overall length of 152.40 mm (6.000 inches), it suits tight-bore finish work where tool clearance is critical.

This boring bar is intended for use on CNC turning centers and lathes in metalworking environments. The 3/8-inch (9.53 mm) shank diameter makes it compatible with standard boring bar holders at that size. A center-to-cutting-edge dimension of 0.250 inches ensures predictable geometry when setting up minimum-bore passes. It is typically installed and operated by machinists and CNC programmers in production and job-shop settings where consistent bore geometry and surface finish are required.

Key Features

• E-STUN toolholder style for rigid insert clamping and precise boring geometry
• Solid carbide construction for vibration dampening and dimensional stability in small-bore applications
• Through-coolant design with 0.125-inch coolant hole for effective chip evacuation and thermal management
• Screw-clamp insert holding method ensures secure, repeatable insert indexing
• Accepts T221P inserts for flexible cutting-edge selection
• Right-hand cutting orientation for standard lathe spindle direction

Compatibility

Designed to accept T221P E-STUN style inserts. The 3/8-inch shank diameter fits standard boring bar holders sized for 9.53 mm shanks. Consult the KENNAMETAL insert compatibility guide to confirm insert grade and geometry selection for your specific workpiece material and cutting parameters.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Power down and lock out the machine before mounting or removing the boring bar from the toolholder. Ensure the shank is fully seated and properly torqued in the boring bar holder per the machine tool manufacturer specifications before operation. Connect through-coolant supply lines and verify coolant flow before initiating a cutting pass.