Kennametal 1950390 Indexable Boring Bar 0.54 in Right Hand

Product Description

The KENNAMETAL 1950390 is a right-hand indexable boring bar designed for precision internal turning and boring operations on CNC lathes and machining centers. The shank is solid carbide for vibration resistance and rigidity, while the head is steel for toughness at the cutting zone. It features a screw-type insert holding method, a 3-degree lead angle, and a neutral rake angle of 0 degrees. Coolant-through capability is built in, with a coolant hole diameter of 0.187 inches, supporting extended tool life in demanding materials. Licensed machinists and CNC operators install and run this toolholder in production and job-shop environments.

This boring bar is suited for internal diameter operations where minimum bore access is 0.54 inches and bore depth can reach up to 5.0 inches. The overall length of 8.0 inches supports reach into deep-bore applications. The Q-series toolholder style is GCBIW. A 0.25-inch insert inscribed circle and 0.094-inch insert thickness define the insert seat geometry. The center-to-cutting-edge dimension is 0.273 inches. This bar is well-matched to production turning cells, tool-and-die shops, and aerospace or general machining environments requiring consistent, repeatable bore finishing.

Key Features

• Solid carbide shank with steel head construction for vibration damping and impact resistance
• Coolant-through design with 0.187-inch coolant hole diameter for chip evacuation and thermal control
• Screw-type insert clamping for secure seating and repeatable indexing
• Right-hand cut orientation with 3-degree lead angle and neutral 0-degree rake
• Compatible with WP-style inserts with a 0.25-inch inscribed circle
• Maximum bore depth of 5.0 inches with 0.54-inch minimum bore diameter entry

Compatibility

Designed for use with WP-series inserts with a 0.25-inch inscribed circle and 0.094-inch thickness. Toolholder style is GCBIW, Q-series. No additional OEM or machine model compatibility was specified in the product data.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the machine spindle and all related axes are powered down and locked out before changing or setting the toolholder. Use the appropriate torque driver for the screw-clamp insert per the insert and toolholder manufacturer guidance. Verify coolant-through passages are clear and aligned with the machine tool coolant supply before running the program.