Kennametal 1328623 Indexable Boring Bar 21.59mm Right Hand

Product Description

The KENNAMETAL 1328623 is a right-hand A-SDUC indexable boring bar designed for precision internal turning and boring operations on CNC lathes and machining centers. Built from steel with a 5/8-inch (15.88mm) shank diameter and a 254mm (10.0-inch) overall length, this toolholder accepts DC-style inserts secured by a screw-clamp holding method. The minimum bore diameter is 21.59mm (0.850 inches), making it suitable for tight-bore finish and semi-finish applications. A neutral rake angle of 0 degrees and a -3-degree lead angle provide stable, predictable cutting geometry. Through-coolant capability is included, with a 1/8-27 NPT coolant hole thread for directed coolant delivery at the cutting edge.

This boring bar is intended for shop-floor use in metalworking environments where consistent bore geometry and surface finish are required. The A-SDUC toolholder style is a standard configuration for screw-clamped diamond and similar insert geometries. Through-coolant support makes it well suited for deep-bore operations where chip evacuation and heat management are critical. Licensed machinists, toolroom technicians, and CNC operators working with steel, cast iron, and similar materials will find this bar appropriate for both production and repair work.

Key Features

• 21.59mm (0.850 inch) minimum bore diameter for tight internal applications
• A-SDUC toolholder style accepts DC-style indexable inserts
• Screw-clamp insert holding method for repeatable edge location
• Through-coolant design with 1/8-27 NPT coolant inlet thread
• Neutral rake, -3-degree lead angle for stable cutting geometry
• Steel construction, 254mm overall length, 5/8-inch shank diameter

Compatibility

Accepts DC.. (DC-style) indexable inserts with a 1/4-inch inscribed circle and 3/32-inch insert thickness. Designed for use with A-SDUC insert geometry in right-hand boring applications.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolsetter. Secure the shank in a compatible boring bar holder or turret station rated for 5/8-inch shanks, ensuring adequate clamping torque per the machine tool manufacturer specifications. Connect through-coolant supply to the 1/8-27 NPT inlet before operation and verify coolant flow before cutting. Always index or replace the insert with machine power and coolant isolated.