{"product_id":"16xd-deep-hole-solid-carbide-drill","title":"16×D Deep Hole Solid Carbide Drill | Internal \u0026 External Coolant","description":"\u003ch2\u003e16×D Deep Hole Solid Carbide Drill\u003c\/h2\u003e\u003cp\u003eDeveloped for CNC deep-hole drilling where extended reach, chip evacuation and coolant delivery are critical. This 16×D carbide drill is offered in both internal-coolant and external-coolant configurations, allowing the tool to be matched to different machines and drilling conditions.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16×D deep-hole capability:\u003c\/strong\u003e designed for holes with a nominal depth up to approximately sixteen times the drill diameter, subject to machine rigidity and cutting conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo coolant configurations:\u003c\/strong\u003e choose internal coolant for through-tool coolant delivery or external coolant for machines and setups using conventional coolant supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid carbide construction:\u003c\/strong\u003e provides rigidity for long-reach precision drilling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-reach geometry:\u003c\/strong\u003e designed for deeper holes where standard-length drills cannot reach.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInternal vs. External Coolant\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eInternal Cooling:\u003c\/strong\u003e coolant passes through the drill and is delivered closer to the cutting zone. This configuration is generally preferred for demanding deep-hole applications because it supports chip evacuation and temperature control.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eExternal Cooling:\u003c\/strong\u003e coolant is supplied from outside the tool. Select this version when your machine does not support through-tool coolant or when the application and drilling conditions allow external coolant delivery.\u003c\/p\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDeep-hole drilling on CNC machining centers\u003c\/li\u003e\n\u003cli\u003eLong-reach hole making in precision components\u003c\/li\u003e\n\u003cli\u003eProduction machining requiring a 16×D drill length\u003c\/li\u003e\n\u003cli\u003eApplications where coolant configuration must match machine capability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSelection Guide\u003c\/h3\u003e\u003cp\u003eVariants are identified by coolant type and dimensional format. Select the correct cutting diameter, shank size, flute or working length, overall length and coolant configuration for your machine and required hole depth.\u003c\/p\u003e\u003ch3\u003eMachining Notes\u003c\/h3\u003e\u003cp\u003eDeep-hole drilling is sensitive to machine rigidity, runout, toolholding, coolant supply and workpiece material. Confirm coolant flow before drilling. For demanding applications, use an appropriate pilot or entry strategy when required by the process, and avoid interrupting coolant supply during deep-hole machining.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNeed help selecting a 16×D drill?\u003c\/strong\u003e Send BB Tool your hole diameter, hole depth, workpiece material, coolant capability and machine information for specification guidance.\u003c\/p\u003e\n\u003cdiv class=\"bb-reviews-banner\" data-bb=\"customer-reviews\" style=\"margin-top:32px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0858\/5343\/8263\/files\/079f3c7d95c58a154adc4313e3418e50.png?v=1790998756\" alt=\"BB Tool customer reviews\" style=\"width:100%;border-radius:8px;display:block;\" loading=\"lazy\"\u003e\u003c\/div\u003e","brand":"BB Tool","offers":[{"title":"Internal Cooling \/ 3x4x57x100","offer_id":51566817771831,"sku":"3x4x57x100-16D-W","price":87.0,"currency_code":"USD","in_stock":true},{"title":"Internal Cooling \/ 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