Kennametal 1271036 Indexable Boring Bar 0.18in Right Hand

Product Description

The KENNAMETAL 1271036 is an indexable boring bar designed for precision internal turning and boring operations on metalworking lathes and machining centers. Built on the Series C platform, it features a solid carbide shank paired with a steel head, delivering vibration resistance and rigidity in tight-bore applications. The bar accepts CDC inserts secured by a screw clamping method and carries a neutral rake angle of 0 degrees, making it suitable for a wide range of workpiece materials. Minimum bore diameter starts at 0.18 inches, with a maximum bore depth of 1-9/16 inches and an overall length of 6 inches. The 5/32-inch shank diameter and 7-degree lead angle suit small-bore finish and semi-finish passes requiring controlled chip flow and consistent dimensional results.

This boring bar is intended for use in small-bore internal diameter machining where rigidity is critical and deflection must be minimized. Typical applications include finish boring of through holes and blind bores in ferrous and non-ferrous materials on CNC lathes, manual lathes, and live-tooling setups. The coolant-through design, with a 0.04-inch coolant hole diameter, supports chip evacuation and heat management during continuous cutting cycles. Machinists and toolroom technicians working with small bore tolerances will find the carbide shank construction particularly effective in extended reach conditions where steel shanks introduce chatter.

Key Features

• Solid carbide shank with steel head for maximum rigidity and vibration dampening in small-bore applications
• Coolant-through capability via a 0.04-inch internal coolant hole for improved chip flushing and tool life
• Screw clamp insert retention for secure, repeatable CDC insert indexing
• Neutral rake angle (0 degrees) provides versatility across a range of workpiece materials
• 7-degree lead angle supports controlled entry and chip direction management
• Right-hand cut orientation; insert inscribed circle of 0.156 inches for precise insert fit

Compatibility

Designed for use with CDC-style inserts. Insert inscribed circle is 0.156 inches and insert thickness is 0.04 inches. Toolholder style is CCBI. No specific machine or system compatibility was stated in the product data beyond CDC insert compatibility.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered down and spindle fully stopped. Use the appropriate torque driver for the screw clamp to avoid over-tightening the insert seat. Verify shank runout and bore alignment before engaging the cut, particularly given the small shank diameter and extended reach potential. Coolant line pressure and flow should be confirmed to match the tool channel specification before initiating coolant-through operation.