{"product_id":"sandvik-coromant-5857579-threading-insert-18-tpi-un","title":"Sandvik Coromant 5857579 Threading Insert 18 Tpi Un","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 5857579 is a solid carbide laydown threading insert designed for external UN thread cutting at 18 threads per inch. Part of the CoroThread 266 series, it carries a PVD-applied TiCrAlN\/TiN coating that provides wear resistance and thermal stability during threading operations. The insert features a right-hand cutting orientation, a 60-degree included angle, and an F chipbreaker geometry. It is intended for use by machinists and CNC turning specialists working on threaded external profiles in production or job-shop environments.\u003c\/p\u003e\u003cp\u003eThis insert is suited for external UN threading applications on CNC lathes and turning centers. The 266RG-16UN01F180E designation in the 1135 grade indicates a coated carbide formulation optimized for threading steel and similar ferrous workpiece materials. The single-tooth profile and laydown-style seating make it appropriate for precision thread form control in both high-volume production runs and lower-volume precision work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide substrate with PVD TiCrAlN\/TiN coating for extended tool life\u003c\/li\u003e\n\u003cli\u003e18 TPI external UN thread profile with 60-degree included angle\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting orientation, laydown insert style\u003c\/li\u003e\n\u003cli\u003eF chipbreaker geometry for controlled chip formation during threading\u003c\/li\u003e\n\u003cli\u003eCoroThread 266 series toolholder compatibility\u003c\/li\u003e\n\u003cli\u003e3\/8-inch (9.53 mm) inscribed circle; 5\/32-inch (3.97 mm) thickness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with CoroThread 266 series toolholders accepting size 16 laydown threading inserts. Specific toolholder compatibility should be confirmed against SANDVIK COROMANT CoroThread 266 system documentation using insert style code 266 and insert size code 16.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThreading inserts should be installed and indexed by a qualified machinist with the machine spindle fully stopped and the toolholder secured in the turret. Use the appropriate torx or clamping screw torque driver specified by the toolholder system  -  do not over-torque the clamping screw. Confirm insert seating is flush and free of chips or debris before resuming cutting operations. Follow shop safety procedures and machine manufacturer guidelines when changing inserts on CNC turning equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: 266 Laydown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CoroThread 266\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: 1135\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCrAlN\/TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads Per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: F\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\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 (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\u003eWeight\u003c\/strong\u003e: 0.12 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: 5857579\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51739516469554,"sku":"5857579","price":612.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5929439e42fa52d950984d662a610ba4_17f74484-ae01-42f9-b956-853b0f703b5a.jpg?v=1788815574","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-5857579-threading-insert-18-tpi-un","provider":"Voomi Supply","version":"1.0","type":"link"}