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The SCIENTIFIC CUTTING TOOLS B100300A is a submicron solid carbide boring bar designed for precision internal diameter finishing in small-bore applications. It cuts right-hand and features an AlTiN+ finish coating that extends tool life in ferrous and high-temperature alloy materials. With a minimum bore diameter of 0.1 inches and a maximum bore depth of 0.3 inches, this bar is built for tight-tolerance work where dimensional accuracy is critical. The 0.125-inch shank diameter and 1.5-inch overall length make it compatible with standard small-bore toolholders on CNC lathes and turning centers.
This boring bar is suited for precision machining operations in job shops, production turning cells, and tool rooms. It handles small internal diameter bores in materials including steel, stainless, cast iron, and high-temp alloys where the AlTiN+ coating provides thermal resistance and wear protection. Typical applications include finish boring of hydraulic valve bodies, medical components, aerospace fittings, and other parts requiring close-tolerance internal features. Machinists and CNC operators running small-diameter internal work will find this bar appropriate for both roughing passes at shallow depths and final finishing cuts.
Designed as an OEM-style precision boring bar for use in CNC lathes, turning centers, and manual lathes equipped with toolholders accepting a 0.125-inch shank diameter.
This bar is installed by qualified machinists or CNC operators. Power down and lock out the machine spindle before changing or setting tooling. Minimize shank overhang beyond the toolholder to reduce chatter and deflection in small-bore work. Verify bore diameter and depth limits before beginning a cut to avoid tool breakage on this small-diameter bar.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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