{"product_id":"allied-4c21p-703-spade-drill-insert-45-64-in-solid-carbide","title":"Allied 4C21P-.703 Spade Drill Insert 45\/64 in Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ALLIED MACHINE AND ENGINEERING 4C21P-.703 is a solid carbide spade drill insert designed for high-performance hole-making in demanding machining applications. Part of the GEN2 T-A series, this insert features a 132-degree point angle and an AM300 PVD coating applied over a C2 (K20) carbide grade substrate. The AM300 coating provides enhanced wear resistance and thermal stability, extending tool life when drilling through tough workpiece materials. At 0.703 inches in diameter (45\/64 inch nominal) with a Seat Size 1 designation, this insert seats directly into compatible T-A style spade drill holders. Machinists and tool-and-die professionals specify this insert for precision boring operations where consistency and edge retention are critical.\u003c\/p\u003e\u003cp\u003eThis insert is suited for drilling stainless steel, cast iron, non-ferrous metals, and super-alloys including titanium. It is used in CNC machining centers, lathes with driven tooling, and manual boring mills across both production and job-shop environments. The GEN2 T-A series geometry is engineered to handle interrupted cuts and cross-hole applications where insert stability and point strength are essential. Aerospace, automotive, and general metalworking shops commonly use this insert series when hole tolerances and surface finish requirements are tight.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e45\/64 inch (0.703 inch) diameter with Seat Size 1 for direct T-A holder compatibility\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction in C2 (K20) grade for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003eAM300 PVD coating for extended tool life in stainless steel, cast iron, non-ferrous metals, and super-alloys\u003c\/li\u003e\n\u003cli\u003e132-degree point angle optimized for reduced thrust and clean entry geometry\u003c\/li\u003e\n\u003cli\u003eGEN2 T-A series design engineered for demanding production drilling environments\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replacement insert for GEN2 T-A series spade drill holders requiring a Seat Size 1 insert at 45\/64 inch diameter. Consult the Allied Machine and Engineering GEN2 T-A holder selection guide to confirm holder-to-insert seating compatibility before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert installation and replacement should be performed by a qualified machinist or tooling technician with the machine fully powered down and the spindle locked. Use the manufacturer-specified torque wrench and insert screw to seat the insert properly in the holder pocket — do not overtighten or substitute fasteners. Inspect the holder pocket for chips, wear, or damage before seating a new insert. Follow your facility safety program and applicable OSHA machine guarding requirements when handling carbide cutting tools.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 45\/64 inch (0.703 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Size\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: GEN2 T-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Angle\u003c\/strong\u003e: 132 degrees\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: C2 (K20)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: AM300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Classification\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1563 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 0.38 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Stainless Steel, Cast Iron, Non-Ferrous Metal, Super-alloys and Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: ALLIED MACHINE AND ENGINEERING\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4C21P-.703\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ALLIED MACHINE AND ENGINEERING","offers":[{"title":"Default Title","offer_id":51744532693298,"sku":"4C21P-.703","price":108.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a4b2f464f2c60342200b48429b90a7fc_796d4280-8a32-4343-8276-5999ab8d3225.jpg?v=1788857661","url":"https:\/\/voomisupply.com\/products\/allied-4c21p-703-spade-drill-insert-45-64-in-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}