{"product_id":"hertel-h59874537-boring-insert-tpcg221-hc620b-solid-carbide","title":"Hertel H59874537 Boring Insert TPCG221 HC620B Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL H59874537 is a solid carbide boring insert designed for precision internal turning and boring operations on CNC and manual lathes. Manufactured to TPCG221 insert geometry, it features a 60-degree triangular shape with an 11-degree relief angle and a 1\/64 inch (0.0310 inch) corner radius. The HC620B grade substrate is processed via CVD coating with a multilayer TiN, TiC, TiCN, TiN finish, placing it in the C7 material grade range — suited for finishing and semi-finishing cuts in steel and cast iron. Machinists and toolroom technicians select this insert for boring bars requiring screw-held TPCG-style tooling with consistent edge geometry.\u003c\/p\u003e\n\u003cp\u003eThis insert is used in boring operations on CNC machining centers and manual lathes across light manufacturing, job shop, and production environments. The right-hand configuration makes it compatible with standard right-hand boring bar bodies that accept TPCG221 indexable inserts. It is well suited for applications requiring tight tolerances on internal diameters, where controlled corner geometry and a reliable multilayer CVD coating reduce built-up edge and extend tool life between index changes.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide substrate with CVD-applied multilayer TiN, TiC, TiCN, TiN coating for wear resistance\u003c\/li\u003e\n  \u003cli\u003eTPCG221 insert style — 60-degree triangle with 11-degree relief angle\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch inscribed circle (0.2500 inch) and 3\/32 inch thickness (0.0960 inch)\u003c\/li\u003e\n  \u003cli\u003e1\/64 inch corner radius (0.0310 inch) for semi-finish to finish boring cuts\u003c\/li\u003e\n  \u003cli\u003eScrew-held mounting method for positive insert location in boring bar pockets\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting configuration; HC620B grade rated C7 material grade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement for boring bar bodies accepting TPCG221-style screw-held indexable inserts with a 1\/4 inch inscribed circle.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Before indexing or replacing inserts, ensure the machine spindle is fully stopped and locked out per facility lockout\/tagout procedures. Seat the insert fully into the pocket and torque the clamping screw to the boring bar manufacturer's specified value using the correct Torx or hex key — do not overtighten, as this can fracture the carbide. Inspect the insert pocket for chips or debris before seating a new edge.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: TPCG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Size Code\u003c\/strong\u003e: 221\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShape\u003c\/strong\u003e: Triangle, 60 degrees included angle\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: HC620B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiN, TiC, TiCN, TiN (multilayer CVD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 1\/4 inch (0.2500 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 3\/32 inch (0.0960 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/64 inch (0.0310 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 11 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: CVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: H59874537\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51732160250162,"sku":"H59874537","price":329.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/64c3a99a0902f5ec61ef62fa63d5a6ab.jpg?v=1788739861","url":"https:\/\/voomisupply.com\/products\/hertel-h59874537-boring-insert-tpcg221-hc620b-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}