Kennametal 1152741 Indexable Boring Bar 18.54mm Left Hand

Product Description

The KENNAMETAL 1152741 is a left-hand E-SDUP indexable boring bar designed for precision internal turning operations on CNC lathes and machining centers. Built from solid carbide, it accepts DP-style inserts secured by a screw-clamp holding method, delivering rigid, repeatable cutting performance. The bar features a minimum bore diameter of 18.54mm (0.730 inches) and an overall length of 203.2mm (8.000 inches), with a 12.70mm (0.500 inch) round shank. A through-coolant passage with a 0.187-inch coolant hole diameter keeps the cutting zone clear and extends insert life in deep-bore applications. A neutral rake angle and -3 degree lead angle suit a wide range of ferrous and non-ferrous boring work.

This boring bar is intended for shop-floor machinists and tooling engineers running production or job-shop bore finishing operations. It is suited to applications where a left-hand orientation is required by fixturing geometry or tool-path direction. The through-coolant capability makes it particularly effective in deep-bore and tight-tolerance work where chip evacuation and heat management are critical. The 1/4-inch inscribed circle insert size and 3/32-inch insert thickness correspond to standard DP-style insert offerings, keeping tooling costs predictable.

Key Features

• Left-hand holder orientation for applications requiring reverse-direction cutting
• Through-coolant design with 0.187-inch coolant hole for effective chip and heat management in deep bores
• Solid carbide tool body provides high rigidity and vibration resistance
• Screw-clamp insert holding method for secure, repeatable insert indexing
• Neutral rake angle with -3 degree lead angle suits a broad range of boring materials and cut conditions
• Accepts standard DP-style inserts with 1/4-inch inscribed circle and 3/32-inch thickness

Compatibility

Designed for use with DP-style inserts (DP.. designation) featuring a 1/4-inch inscribed circle and 3/32-inch thickness, as specified by the E-SDUP toolholder style. Consult the KENNAMETAL insert catalog to select the appropriate DP grade and geometry for your specific workpiece material.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and all stored energy is released before mounting or removing the boring bar. The shank should be clamped to the minimum recommended engagement depth per shop standards to prevent deflection; avoid clamping on the fluted or cutting-end section. Verify coolant supply pressure and line connections are compatible with the machine tool before engaging through-coolant flow.