Kennametal 1094749 Indexable Boring Bar 0.77 in Right Hand

Product Description

The KENNAMETAL 1094749 is a right-hand A-STLP indexable boring bar designed for precision internal turning operations on CNC and manual lathes. Built from steel, it features a 5/8-inch shank diameter, a 10-inch overall length, and a minimum bore diameter of 0.77 inches (19.56 mm). A -5-degree lead angle and neutral rake geometry (0-degree rake) promote stable cutting and reduce chatter in tight bore applications. Through-coolant capability is delivered via a 1/8-27 NPT coolant hole, keeping the cutting zone clear and extending insert life. It accepts TP-style inserts held by screw-clamp, with an inscribed circle of 1/4 inch and insert thickness of 3/32 inch. Machinists and toolroom technicians install this bar in production and job-shop environments.

This boring bar suits applications requiring precise bore finishing and semi-finishing in steel, cast iron, and similar materials on standard lathes and machining centers. The A-STLP toolholder style is a recognized geometry for internal diameter work where controlled lead angle and coolant delivery are needed to maintain dimensional accuracy and surface finish. The 10-inch OAL provides adequate reach for moderate-depth bores while the 5/8-inch shank fits common boring bar holders and turret stations. It is not a multi-use tool and is configured specifically for single-point internal turning with TP-compatible indexable inserts.

Key Features

• Minimum bore diameter of 0.77 inches (19.56 mm) for tight internal turning access
• Through-coolant design with 1/8-27 NPT coolant hole thread for direct cutting zone cooling
• A-STLP toolholder style with -5-degree lead angle and neutral (0-degree) rake for stable cutting
• Screw-clamp insert holding method for secure, repeatable indexing
• Accepts TP-style inserts with 1/4-inch inscribed circle and 3/32-inch thickness
• Steel construction with 5/8-inch shank diameter and 10-inch overall length

Compatibility

Designed for use with TP-style indexable inserts. Compatible with boring bar holders and turret stations accepting a 5/8-inch round shank. Insert style is A-STLP geometry as specified by the toolholder designation.

Installation Notes

Installation is performed by machinist or toolroom personnel following standard lathe tooling setup procedures. Power down and lock out the machine spindle before mounting or removing the boring bar from the turret or tool block. Ensure the coolant supply line is connected to the 1/8-27 NPT port before operating with through-coolant enabled. Do not exceed the machine tool manufacturer's recommended overhang-to-diameter ratio for boring bar setups, as excessive overhang increases vibration and reduces bore accuracy.