{"product_id":"sandvik-coromant-6428058-milling-insert-grade-3330-r390","title":"Sandvik Coromant 6428058 Milling Insert Grade 3330 R390","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SANDVIK COROMANT 6428058 is a solid carbide milling insert in grade 3330, designed for use in R390 series square shoulder milling cutters. It features a parallelogram insert shape with a positive rake angle of 17 degrees and a rounded corner cutting edge style. The insert carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability during interrupted and continuous cuts. With a thickness of 0.1875 inches (4.76 mm) and an inscribed circle of 0.3780 inches (9.60 mm), it fits the standard R390-17 04 08M-KM toolholder interface. This insert is installed by machinists and CNC setup technicians working in production or job-shop environments.\u003c\/p\u003e\u003cp\u003eThis insert is intended for milling cast iron workpieces, as indicated by primary workpiece material code K. It is suited for square shoulder milling operations where consistent chip control and edge stability are required. The KM chip breaker geometry is matched to the insert size code 170408 and the R390 cutter series. The single-sided, right-hand configuration and screw-holding method make it a direct-fit insert for compatible R390 toolholders. Applications include face milling, shoulder milling, and slotting in both production and maintenance machining contexts on cast iron components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGrade 3330 solid carbide substrate with CVD multilayer TiCN, Al2O3, and TiN coating for wear and thermal resistance\u003c\/li\u003e\n\u003cli\u003eParallelogram insert shape with 90-degree included angle and positive 17-degree rake for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eCorner radius of 0.0315 inches (0.80 mm) with rounded cutting edge style reduces insert chipping on entry\u003c\/li\u003e\n\u003cli\u003eMaximum depth of cut of 0.6299 inches (16.00 mm) supports aggressive square shoulder passes\u003c\/li\u003e\n\u003cli\u003eKM chip breaker geometry optimized for cast iron material application\u003c\/li\u003e\n\u003cli\u003eSingle-sided, right-hand insert with screw-holding method for secure, repeatable seating in R390 toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with R390 series milling cutters. ANSI and ISO code: R390-17 04 08M-KM 3330. Insert size code 170408. Cutter series compatibility is R390 as specified by the manufacturer.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert installation should be performed by a qualified machinist or CNC technician with the spindle fully stopped and the machine placed in a locked-out, de-energized state before handling cutting inserts. Use the appropriate Torx or hex key per the toolholder manufacturer specification to seat the clamping screw. Inspect the insert pocket for debris, damage, or wear before seating the new insert. Follow the toolholder manufacturer torque guidance and confirm insert seating is flush before resuming operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: R390\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Parallelogram\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: 3330\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN, Al2O3, TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 170408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 3\/16 inches (0.1875 inches \/ 4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.3780 inches (9.60 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/32 inches (0.0315 inches \/ 0.80 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 0.6181 inches (15.70 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.3780 inches (9.60 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1614 inches (0.16 mm nominal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.6299 inches (16.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 17 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Corner Rounded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: KM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double Sided\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 90 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron (Code K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Code\u003c\/strong\u003e: R390-17 04 08M-KM 3330\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: R390-17 04 08M-KM 3330\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.19 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: 6428058\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SANDVIK COROMANT","offers":[{"title":"Default Title","offer_id":51755030315314,"sku":"6428058","price":423.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/38ecf10af004d4d2005ddc0bc549caf7_44a97eae-7aa2-498d-b534-c67f3073b2b7.jpg?v=1788950621","url":"https:\/\/voomisupply.com\/products\/sandvik-coromant-6428058-milling-insert-grade-3330-r390","provider":"Voomi Supply","version":"1.0","type":"link"}