{"product_id":"sandvik-coromant-5721288-indexable-boring-bar-coroturn-107","title":"Sandvik Coromant 5721288 Indexable Boring Bar Coroturn 107","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5721288 is a steel indexable boring bar from the CoroTurn 107 series, designed for internal boring and turning operations on CNC lathes and machining centers. The toolholder features a 0.25 inch shank diameter and an overall length of 3.25 inches, with a minimum bore diameter of 0.3425 inch (8.70 mm). Insert clamping is achieved via a screw-lock method, which provides rigid, repeatable insert seating. The neutral rake angle and zero-degree lead angle make this holder suitable for a wide range of workpiece materials. It accepts TCMT 1.21.20 inserts with a 0.1563 inch inscribed circle and supports coolant-through delivery for chip evacuation in deep-bore applications. Machinists and CNC operators install this bar in both production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis boring bar is suited for small-diameter internal boring and turning on lathes and turning centers where tight bore tolerances are required. The right-hand cutting orientation and A-STFC toolholder style position it for standard front-facing internal cuts. The multi-use designation allows application in both boring and turning setups with a single holder. Its compact shank diameter and short overall length make it practical for small-bore work on both manual and CNC turning equipment. One insert is used per toolholder, keeping setup straightforward for production runs and prototype work alike.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMinimum bore diameter of 0.3425 inch (8.70 mm) for small-bore internal machining\u003c\/li\u003e\n\u003cli\u003eScrew clamping insert retention for rigid, repeatable seating\u003c\/li\u003e\n\u003cli\u003eCoolant-through capability supports chip evacuation in deep or tight bores\u003c\/li\u003e\n\u003cli\u003eAccepts TCMT 1.21.20 inserts with 0.1563 inch inscribed circle\u003c\/li\u003e\n\u003cli\u003eNeutral rake (0 degrees) and zero-degree lead angle for broad material compatibility\u003c\/li\u003e\n\u003cli\u003eMulti-use design supports both boring and turning applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with TCMT 1.21.20 series inserts. Part of the SANDVIK COROMANT CoroTurn 107 toolholder series. Designed for use in CNC lathes and turning centers that accept a 0.25 inch round shank toolholder.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and all power is locked out before changing inserts or mounting the toolholder. Secure the shank in the tool turret or boring bar holder to the appropriate clamping torque per the machine manufacturer specification. Verify coolant-through port alignment if using internal coolant delivery to avoid restricted flow during operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroTurn 107\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: A-STFC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Bore Diameter\u003c\/strong\u003e: 0.3425 inch (8.70 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inch (6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.25 inches (82.55 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.25 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 3.25 inches (82.55 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter to Cutting Edge\u003c\/strong\u003e: 0.1720 inch (4.37 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: TCMT 1.21.20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 0.1563 inch (3.97 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.0750 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 (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\u003eNumber of Inserts\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Boring and Turning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241601\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: 5721288\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51731994771762,"sku":"5721288","price":331.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0c89fe9dfdcf8d6764fb739f62f4b5e8.jpg?v=1788737805","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5721288-indexable-boring-bar-coroturn-107","provider":"Voomi Supply","version":"1.0","type":"link"}