Kennametal 1152770 Indexable Boring Bar E-stlp Left Hand

Product Description

The KENNAMETAL 1152770 is a left-hand, solid carbide indexable boring bar designed for precision internal turning operations. Built to the E-STLP toolholder style, it accepts TP.. series inserts secured by a screw-clamp holding method. The bar features a minimum bore diameter of 15.24mm (0.600 inches) and an overall length of 203.20mm (8.000 inches), with a 12.70mm (0.500 inch) shank diameter. A neutral rake angle and a -5 degree lead angle provide stable, controlled cutting geometry. Through-coolant capability supports chip evacuation and heat management in deep-bore applications. This tool is intended for installation and use by machinists and CNC toolroom professionals.

The 1152770 is suited for internal boring operations on CNC lathes and turning centers where left-hand tooling orientation is required. The through-coolant design makes it well-suited for deeper bore applications where direct coolant delivery to the cutting zone is critical for tool life and surface finish. The screw-clamp insert retention provides repeatable indexing, reducing setup time between insert changes. Typical applications include finishing and semi-finishing of bored holes in ferrous and non-ferrous workpiece materials.

Key Features

• Left-hand E-STLP toolholder style for correct cutting orientation on CNC turning setups
• Solid carbide construction for rigidity and vibration resistance in small-bore applications
• Through-coolant capability with a 0.187-inch coolant hole diameter for direct cutting-zone delivery
• Accepts TP.. series inserts with 1/4-inch inscribed circle and 3/32-inch insert thickness
• Screw-clamp insert holding method ensures secure, repeatable insert indexing
• Neutral rake (0 degrees) with -5 degree lead angle for controlled chip formation

Compatibility

Designed for use with TP.. series indexable inserts. Compatible with toolholding systems and turrets that accept a 1/2-inch (12.70mm) round shank boring bar. Verify machine turret bore and coolant port alignment before installation.

Installation Notes

This boring bar should be installed and set up by a qualified machinist or CNC toolroom technician. Ensure the machine spindle is fully stopped and the turret is in a safe, indexed position before mounting or removing the tool. Confirm shank clamping torque meets the machine tool manufacturer's specifications for the turret style in use. Connect through-coolant supply only after confirming port alignment and adequate coolant pressure for the application.