{"product_id":"sandvik-coromant-5757939-threading-insert-16-tpi","title":"Sandvik Coromant 5757939 Threading Insert 16 Tpi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5757939 is a solid carbide laydown threading insert designed for external UN thread forms at 16 threads per inch. Part of the CoroThread 266 series, it features a TiCrAlN\/TiAlN PVD coating that supports cutting performance in a range of workpiece materials. The insert has a 3\/8 inch (9.53 mm) inscribed circle, a thickness of 5\/32 inch (0.1563 inch decimal), and a 60-degree included angle. Right-hand cutting orientation makes it suitable for standard external threading operations on CNC lathes and turning centers. It is sold individually and requires a minimum order of 10 units.\u003c\/p\u003e\u003cp\u003eThis insert is used in turning and threading applications where consistent UN thread profiles are required on external diameters. The CoroThread 266 platform is designed for rigid insert seating and repeatable thread form accuracy, making it a common choice in production machining environments. Machinists working in job shops, aerospace, and general manufacturing will find this insert appropriate for high-volume external threading passes where coating durability and edge consistency are priorities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide substrate with TiCrAlN\/TiAlN PVD dual-layer coating for extended tool life\u003c\/li\u003e\n\u003cli\u003e16 TPI external UN thread form with 60-degree included angle\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting orientation for standard external threading\u003c\/li\u003e\n\u003cli\u003eCoroThread 266 series insert style for secure seating in compatible toolholders\u003c\/li\u003e\n\u003cli\u003e3\/8 inch inscribed circle with 5\/32 inch thickness for precise fitment\u003c\/li\u003e\n\u003cli\u003eChipbreaker style A suited for controlled chip formation during threading passes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with SANDVIK COROMANT CoroThread 266 series toolholders that accept the 266 insert style with a 16 size code. Refer to the manufacturer catalog number 266RG-16UN01A160M 1125 when cross-referencing compatible boring bars and toolholder bodies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following the toolholder manufacturer torque and clamping guidelines for the CoroThread 266 system. Ensure the machine spindle is fully stopped and the toolholder is clean and free of debris before seating the insert. Verify insert orientation matches the programmed cutting direction before commencing threading cycles. Inspect the insert seating pocket for wear or damage that could affect thread form accuracy.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: 266\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: 1125\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads Per Inch\u003c\/strong\u003e: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 3\/8 inches (9.53 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 5\/32 inches (0.1563 inches decimal \/ 3.97 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1732 inches (4.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Teeth Per Side\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCrAlN\/TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroThread 266\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 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: 5757939\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51729158963506,"sku":"5757939","price":567.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cd94e254890a5252541427527eff509e_8b8f2b43-f755-4659-b5f6-07e777468c37.jpg?v=1788701099","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5757939-threading-insert-16-tpi","provider":"Voomi Supply","version":"1.0","type":"link"}