Kennametal 1937982 Indexable Boring Bar Right Hand Csbi

Product Description

The KENNAMETAL 1937982 is a right-hand CSBI-style indexable boring bar designed for precision internal turning operations on CNC lathes and boring machines. Built from steel, it accepts CDC and CSBI inserts secured by a screw-clamping insert holding method. The positive rake geometry at a 5-degree lead angle reduces cutting forces and supports clean bore finishes at small diameters. With a minimum bore diameter of 0.208 inches and a maximum bore depth of 1 inch, this bar is suited for tight-tolerance small-bore work. Through-coolant capability with a 0.040-inch coolant hole diameter keeps the cutting zone clear and helps manage heat during extended cuts.

This boring bar is used in precision machining environments including job shops, production turning cells, and tool and die operations. It fits applications where small internal diameters require a rigid, indexable solution rather than a brazed or solid boring tool. The 0.5-inch shank diameter makes it compatible with standard boring bar holders and quick-change tooling systems commonly found on CNC lathes. It is installed and operated by machinists and CNC operators working to close bore tolerances in steel, cast iron, and similar materials.

Key Features

• Right-hand CSBI toolholder style with screw-clamping insert retention
• Accepts CDC and CSBI inserts with a 0.156-inch inscribed circle
• Through-coolant design with 0.040-inch coolant hole for chip evacuation and thermal control
• Positive rake angle at 5-degree lead reduces cutting forces on small-bore work
• Steel construction with 0.5-inch shank diameter for secure toolholder fitment
• Overall length of 2.75 inches provides rigidity while maintaining access in confined bores

Compatibility

Compatible with CDC and CSBI indexable inserts. Designed for use in standard 0.5-inch boring bar holders on CNC lathes and boring machines. Manufacturer catalog reference: A2908XSCLDR121.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the machine is locked out before changing or seating the boring bar. Torque the insert screw to the tooling manufacturer guidelines using the appropriate Torx or hex key — do not overtighten, as insert seats on small boring bars are precision-ground surfaces. Verify through-coolant passages are clear before use and confirm shank clamp contact is uniform to prevent chatter at depth.