{"product_id":"scientific-cutting-tools-bb158-radial-relief-boring-bar","title":"Scientific Cutting Tools BB158 Radial Relief Boring Bar","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS BB158 is a radial relief boring bar designed for precision internal diameter machining on lathes and boring mills. Built from submicron-grade solid carbide, this bar delivers the rigidity and wear resistance required for tight-tolerance bores in hard and abrasive workpiece materials. It cuts in a right-hand direction and handles a minimum bore diameter of 0.155 inches with a maximum bore depth of 1 inch. The 3\/16-inch shank diameter and 2-inch overall length make it well suited for small-bore applications where reach and clearance are critical. Machinists and toolroom professionals specify this type of bar when consistent surface finish and dimensional accuracy are non-negotiable.\u003c\/p\u003e\n\u003cp\u003eThis boring bar is intended for small-diameter internal turning operations in production and toolroom environments. It is commonly used on CNC lathes, manual engine lathes, and boring mills where the minimum bore diameter falls in the 0.155-inch range. The uncoated submicron carbide construction performs effectively across a range of ferrous and non-ferrous materials. It is a single-piece solid carbide design, making it appropriate for applications where insert-style bars lack the stiffness needed at small bore diameters.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSubmicron-grade solid carbide construction for superior hardness and edge retention in tight-tolerance bores\u003c\/li\u003e\n  \u003cli\u003eRadial relief geometry reduces cutting forces and improves chip clearance in small-diameter bores\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting direction for standard lathe and boring mill setups\u003c\/li\u003e\n  \u003cli\u003eMinimum bore diameter of 0.155 inches suits precision small-bore work\u003c\/li\u003e\n  \u003cli\u003eMaximum bore depth of 1 inch with a 3\/16-inch shank diameter for stable reach\u003c\/li\u003e\n  \u003cli\u003eUncoated finish preserves sharp edge geometry out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use solid carbide boring bar for lathes and boring mills accepting a 3\/16-inch shank diameter toolholder.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists familiar with lathe or boring mill toolholding systems. Power down and lock out the spindle before seating or removing the bar from the toolholder. Ensure the shank is fully seated and clamped securely to minimize runout and chatter. Follow machine manufacturer torque guidelines for toolholder set screws when securing small-diameter shank tooling.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoring Bar Type\u003c\/strong\u003e: Radial Relief\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 0.155 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Bore Depth\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Submicron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0625 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SCIENTIFIC CUTTING TOOLS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: BB158\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":51973236392242,"sku":"BB158","price":39.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/20de1155d65f17dc2ee6358a795a49f5.jpg?v=1789972537","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-bb158-radial-relief-boring-bar","provider":"Voomi Supply","version":"1.0","type":"link"}