{"product_id":"sumitomo-16gc276-pcbn-turning-insert-bn350-triangle","title":"Sumitomo 16GC276 Pcbn Turning Insert BN350 Triangle","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO 16GC276 is a NUTPGA221 polycrystalline cubic boron nitride (PCBN) turning insert designed for precision machining of hard materials. It features a triangular insert shape with a 60-degree included angle, a 1\/4-inch inscribed circle (0.2500 inches), and a 1\/64-inch corner radius (0.0156 inches). The insert thickness is 1\/8 inch (0.1250 inches) and the part carries the BN350 manufacturer grade. The uncoated PCBN substrate is engineered for high-hardness workpiece materials where conventional carbide inserts lose performance. This insert is installed by CNC machinists and toolroom technicians working on turning centers and CNC lathes.\u003c\/p\u003e\u003cp\u003eThis insert is suited for single-point turning operations on hard materials, including hardened steels and wear-resistant alloys, in both light and medium finishing applications. The positive rake geometry and P clearance code support clean chip evacuation and reduced cutting forces. The screw-held mounting method (insert holding method: screw) keeps setup repeatable on standard toolholders conforming to ANSI and ISO 13399 standards. It is appropriate for high-precision production turning in industrial and toolroom environments where surface finish and dimensional control on hard workpieces are priorities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePCBN insert material for hard-material turning where carbide is unsuitable\u003c\/li\u003e\n\u003cli\u003eBN350 grade, uncoated, positive rake geometry (clearance code P)\u003c\/li\u003e\n\u003cli\u003e1\/4-inch inscribed circle, 1\/8-inch insert thickness, 1\/64-inch corner radius\u003c\/li\u003e\n\u003cli\u003eTriangular insert shape (60-degree included angle) with 1 cutting edge\u003c\/li\u003e\n\u003cli\u003eScrew-held mounting for secure, repeatable toolholder positioning\u003c\/li\u003e\n\u003cli\u003eConforms to ANSI NUTPGA221 and ISO NU-TPGW110304 designations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard-fit insert for ANSI NUTPGA221 and ISO NU-TPGW110304 toolholder pockets on turning centers and CNC lathes configured for triangular screw-held inserts in hard-material (H-grade workpiece) applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or toolroom technician following standard insert-change procedures on a powered-down or E-stopped CNC turning center. Secure the insert using the manufacturer-specified screw torque listed in the toolholder documentation. Inspect the insert pocket and seating surface for debris or damage before seating the new insert. Follow shop safety protocols and applicable machine-tool standards when handling PCBN inserts, as edges are extremely sharp.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Polycrystalline Cubic Boron Nitride (PCBN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: BN350\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Code\u003c\/strong\u003e: NUTPGA221\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: NU-TPGW110304\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Triangle (60-degree included angle)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 1\/4 inch (0.2500 inches \/ 6.35 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/64 inch (0.0156 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 1\/8 inch (0.1250 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.0984 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.1300 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance Code\u003c\/strong\u003e: P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance Code\u003c\/strong\u003e: G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Hard Material (Code H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO 13399\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SUMITOMO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 16GC276\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51750824739122,"sku":"16GC276","price":72.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f4294dbb4cbb3116f6917fcc1acd0002_2eca2fa4-6233-406e-85e9-5c0e7b7bf61f.jpg?v=1788920009","url":"https:\/\/voomisupply.com\/products\/sumitomo-16gc276-pcbn-turning-insert-bn350-triangle","provider":"Voomi Supply","version":"1.0","type":"link"}