{"product_id":"keo-919-000-236-countersink-5-16-in-cobalt-steel","title":"Keo 919-000-236 Countersink 5\/16 in Cobalt Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KEO 919-000-236 is a single-end countersink designed for countersinking and deburring operations in light-duty machining applications. Built from cobalt steel, this tool offers improved heat and wear resistance compared to standard high-speed steel, making it well suited for harder or abrasive work materials. It features a 5\/16 inch head diameter with a 100-degree included angle and a straight-cylindrical 1\/4 inch shank for secure chuck mounting. The right-hand cutting direction and burr-free entry geometry make it a reliable choice for machinists and tool-room technicians who need consistent countersink performance without a pilot.\u003c\/p\u003e\u003cp\u003eThis countersink is intended for use on aluminum, non-metallic materials, and plastics. The cutting diameter range spans 3\/32 inch to 9\/32 inch, covering a broad range of fastener seat sizes in that spectrum. It is well suited for bench drill presses, CNC machining centers, and hand-held drill applications where a clean, chamfered seat is required ahead of flat-head or oval-head fastener installation. Typical users include machinists, production operators, and maintenance technicians working in light manufacturing or fabrication environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt steel construction for improved heat resistance and tool life over standard HSS\u003c\/li\u003e\n\u003cli\u003e100-degree included angle suitable for common flat-head fastener seating\u003c\/li\u003e\n\u003cli\u003eCutting diameter range: 3\/32 inch to 9\/32 inch\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical 1\/4 inch shank for standard chuck compatibility\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction for conventional drill rotation\u003c\/li\u003e\n\u003cli\u003eRated for aluminum, non-metallic materials, and plastics\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for countersinking and deburring applications in aluminum, non-metallic materials, and plastics where a 100-degree seat angle and up to 9\/32 inch cutting diameter are required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis countersink is installed into a standard drill chuck or collet accepting a 1\/4 inch straight shank. Secure the workpiece firmly before operation and set spindle speed appropriate for the material being cut. No pilot is included, so center-punching or pre-drilling a pilot hole is recommended for accurate seat placement. Inspect the cutting edges for wear or chipping before each use and replace when edge integrity is compromised.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 100 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenterline Angle\u003c\/strong\u003e: 50 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Cutting Diameter\u003c\/strong\u003e: 3\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Cutting Diameter\u003c\/strong\u003e: 9\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes Pilot\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Countersinking, Deburring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Non-Metallic Material, Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112812\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KEO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 919-000-236\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KEO","offers":[{"title":"Default Title","offer_id":52106944905522,"sku":"919-000-236","price":26.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b00b54dcb60135194648d41760ad290f.jpg?v=1790073827","url":"https:\/\/voomisupply.com\/products\/keo-919-000-236-countersink-5-16-in-cobalt-steel","provider":"Voomi Supply","version":"1.0","type":"link"}