{"product_id":"sandvik-coromant-5721821-indexable-boring-bar-1-in-shank","title":"Sandvik Coromant 5721821 Indexable Boring Bar 1 in Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5721821 is an indexable boring bar from the CoroTurn 107 series, designed for internal turning operations including boring, profiling, and turning. Built on a steel shank measuring 1 inch in diameter and 12 inches in overall length, this toolholder accepts DCMT 32.52 inserts secured by screw clamping. The minimum bore diameter is 1.2992 inches (33 mm), making it well suited for tight-bore applications. The neutral rake geometry with a 0-degree rake angle and 0-degree lead angle provides predictable cutting performance. Coolant-through capability supports chip evacuation and tool life in demanding cuts.\u003c\/p\u003e\u003cp\u003eThis boring bar is used in CNC lathe and turning center applications where internal diameter work requires a rigid, repeatable toolholder setup. The right-hand cut orientation fits standard spindle configurations. The CoroTurn 107 series is a common platform for production shops running steel, cast iron, and similar workpiece materials. One insert is used per toolholder, and the screw clamping method allows quick index changes without disturbing setup. The bar is appropriate for both roughing and finishing passes within its bore diameter range.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMinimum bore diameter of 1.2992 inches (33 mm) for tight internal turning access\u003c\/li\u003e\n\u003cli\u003eScrew clamping insert retention for secure, repeatable indexing\u003c\/li\u003e\n\u003cli\u003eCoolant-through shank for improved chip control and tool life\u003c\/li\u003e\n\u003cli\u003eNeutral rake, 0-degree rake angle for stable cutting geometry\u003c\/li\u003e\n\u003cli\u003eMulti-use capability: boring, profiling, and turning in a single toolholder\u003c\/li\u003e\n\u003cli\u003eCoroTurn 107 series platform with DCMT 32.52 insert compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with DCMT 32.52 inserts. Designed for use in the CoroTurn 107 series toolholder system with an A-SDUC style holder configuration. Right-hand cut orientation for standard CNC turning center setups.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation of indexable boring bars should be performed by a qualified machinist or tooling technician with the machine powered down and in a locked-out state. Secure the shank firmly in the tool turret or boring bar holder to the full recommended clamp engagement length to minimize overhang deflection. Insert seating should be verified before taking a cut, and the coolant-through port should be confirmed clear and connected to the machine coolant supply. Do not exceed the insert manufacturer's recommended depth of cut or feed rate for the selected DCMT insert grade.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: A-SDUC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 1.2992 inches (33 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1 inch (25.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 12 inches (304.80 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 0.75 inches (19.05 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: DCMT 32.52\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 0.375 inches (9.53 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1563 inches (5\/32 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw Clamping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Angle\u003c\/strong\u003e: 0 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Boring, Profiling, Turning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Inserts\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.25 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SANDVIK COROMANT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5721821\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51728372662578,"sku":"5721821","price":349.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b37482ed3057be71bb7ee5b4a6f6f947.jpg?v=1788690747","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5721821-indexable-boring-bar-1-in-shank","provider":"Voomi Supply","version":"1.0","type":"link"}