{"product_id":"hertel-h-81105504000-combo-drill-countersink-size-4-cobalt","title":"Hertel H-81105504000 Combo Drill Countersink Size 4 Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL H-81105504000 is a combo drill countersink designed to drill and countersink in a single operation. Built from cobalt high-speed steel with a bright, uncoated finish, this tool handles both hole creation and seat preparation without a tool change. It carries a trade size of 4 with a 5\/16 inch body diameter, a 1\/8 inch drill point diameter, and a 118-degree drill point angle. The 60-degree included angle is standard for flat-head fastener seating in metal fabrication and assembly work. Licensed machinists, toolmakers, and production shop technicians are the primary users.\u003c\/p\u003e\u003cp\u003eThis combo drill countersink is suited for metalworking applications where countersunk holes are required for flat-head screws and fasteners. The plain cutting edge style and double end type make it appropriate for use in manual drill presses, CNC lathes, and mill setups. It is a practical choice for repetitive countersinking tasks in steel, stainless, and other ferrous materials where cobalt tooling provides heat and wear resistance over standard high-speed steel.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt tool material for improved heat resistance and tool life in ferrous metals\u003c\/li\u003e\n\u003cli\u003e118-degree drill point angle for general-purpose metal drilling\u003c\/li\u003e\n\u003cli\u003e60-degree included angle for standard flat-head fastener countersinking\u003c\/li\u003e\n\u003cli\u003eDouble end type extends usable tool life\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish maintains dimensional accuracy without coating buildup\u003c\/li\u003e\n\u003cli\u003eCombines drilling and countersinking into a single pass to reduce cycle time\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard trade size 4 combo drill countersink suitable for use in drill presses, CNC lathes, turret lathes, and milling machines that accept 5\/16 inch body diameter countersink tooling.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or toolroom technicians familiar with cutting tool setup and speeds and feeds for cobalt tooling. Secure the tool firmly in the appropriate collet or chuck before operation and verify runout before cutting. Always power down and lock out the machine before changing tooling. Do not exceed the recommended RPM range for the workpiece material and tool diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade Size\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Diameter\u003c\/strong\u003e: 1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 2-1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright, Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Plain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Double\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Countersinking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.15 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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: H-81105504000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51747282944306,"sku":"H-81105504000","price":28.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1b78b4514b2a22fcc4be3663b9d89c55.jpg?v=1788878647","url":"https:\/\/voomisupply.com\/products\/hertel-h-81105504000-combo-drill-countersink-size-4-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}