Kennametal 1152709 E-stfp Indexable Boring Bar Right Hand

Product Description

The KENNAMETAL 1152709 is a right-hand E-STFP indexable boring bar machined from solid carbide, designed for precision internal diameter boring operations on CNC lathes and machining centers. It accepts TP-style inserts secured by a screw-holding method and features a through-coolant design with a 0.125-inch coolant hole diameter to direct fluid directly to the cutting zone. With a minimum bore diameter of 12.19mm (0.480 inches) and a 3/8-inch shank diameter, this bar is suited for tight-bore, close-tolerance work where rigidity and chip evacuation are critical. A neutral rake angle of 0 degrees provides stable cutting geometry across a range of workpiece materials.

This boring bar is intended for use in production and job-shop environments where repeatable, high-accuracy bore finishing is required. The 6-inch overall length and 3/8-inch shank make it compatible with standard boring bar holders and turrets on CNC turning centers. Through-coolant capability reduces heat buildup and improves chip flushing in deep or blind bore applications, minimizing tool deflection and surface finish issues. It is installed and operated by machinist and tooling technicians working to tight tolerances in metal-cutting operations.

Key Features

• Solid carbide construction for high rigidity and vibration resistance in small-bore applications
• Right-hand cut orientation with neutral 0-degree rake angle for stable, consistent chip formation
• Through-coolant design with 0.125-inch coolant hole for direct cutting zone fluid delivery
• Screw-lock insert holding method for secure indexing and repeatable tool positioning
• Accepts TP-style inserts with 1/4-inch inscribed circle and 3/32-inch insert thickness
• Minimum bore diameter of 12.19mm (0.480 inches) for close-tolerance small-bore work

Compatibility

Designed for use with TP-style indexable inserts with a 1/4-inch inscribed circle and 3/32-inch thickness. Fits standard 3/8-inch shank boring bar holders on CNC lathes and turning centers.

Installation Notes

This toolholder is installed by qualified machinists or tooling technicians. Ensure the machine spindle and turret are fully powered down and locked out before mounting or indexing the insert. Confirm shank diameter compatibility with the tool block or holder before clamping. When enabling through-coolant, verify that coolant pressure and flow rate are within the machine and tooling specification range before cutting.