Kennametal 1937960 Indexable Boring Bar 3/8 Inch Shank

Product Description

The KENNAMETAL 1937960 is an indexable boring bar designed for internal turning and boring operations on CNC lathes and machining centers. Built to the A-SCLD-S toolholder style, it accepts CD.. 120605 inserts secured by a screw-clamp holding method, providing repeatable positioning and quick insert changes at the machine. The bar features a 0.204 inch minimum bore diameter and a 3/8 inch shank diameter, with an overall length of 2.5 inches. A positive rake geometry with a 5-degree rake angle and a 95-degree lead angle reduces cutting forces and promotes clean chip evacuation in tight bore profiles. Coolant-through capability via a 0.040 inch coolant hole delivers fluid directly to the cutting zone for thermal control and chip flushing.

This boring bar is suited for small-diameter internal finishing and semi-finishing passes in steel, stainless, cast iron, and non-ferrous alloys. It fits applications where bore depth does not exceed 0.500 inches and where a right-hand cut orientation is required. Machinists and CNC turning specialists use this bar in production and job-shop environments where consistent tool life and insert indexability are priorities. The screw-clamp design supports fast insert swaps without removing the bar from the holder, reducing downtime between passes.

Key Features

• Accepts CD.. 120605 inserts with screw-clamp holding for secure, repeatable seating
• 0.204 inch minimum bore diameter enables access to small internal features
• Coolant-through design with 0.040 inch coolant hole for direct cutting-zone fluid delivery
• Positive rake at 5 degrees with 95-degree lead angle reduces radial cutting forces
• Right-hand cut orientation for standard CNC lathe setup
• 3/8 inch shank diameter fits common boring bar holders and quick-change tooling systems

Compatibility

Designed for use with CD.. 120605 series inserts. Toolholder style is A-SCLD-S. Intended for right-hand cut applications with a maximum bore depth of 0.500 inches.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and the control is in E-stop or safe state before changing inserts or mounting the bar. Secure the shank in the boring bar holder to the torque specification listed in the tooling system documentation — do not over-torque the insert screw, as this can damage the screw or pocket seat. Verify runout and tool offset after mounting before taking the first cut.