{"product_id":"27-64-in-cobalt-heavy-duty-drill-bit-pack-of-6-long-life-cuts","title":"27\/64 in Cobalt Heavy Duty Drill Bit Pack of 6 - Long Life Cuts","description":"\u003cp\u003eIn this review the Drill America 27\/64 in cobalt heavy duty drill bit pack is assessed for users who need a durable bit for tough metals. The bottom line: this jobber length set is best for machinists and fabricators who drill stainless steel, nickel alloys or other high tensile materials because the added cobalt raises red hardness and allows higher cutting speeds, delivering noticeably longer life and consistently sharp performance compared with ordinary HSS bits.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCobalt steel construction:\u003c\/strong\u003e Provides higher heat resistance and higher red hardness so the bits cut harder metals with less wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide finish:\u003c\/strong\u003e A thin oxide surface helps identify the tool and offers similar performance to uncoated bits while resisting light corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound shank:\u003c\/strong\u003e Fits a wide variety of chucks and toolholders so the bits are easy to adapt in most shops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral flutes:\u003c\/strong\u003e Right-hand spiral evacuates chips up and out of the hole to reduce clogging and keep cuts cleaner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNational Aerospace standard 907:\u003c\/strong\u003e Manufactured to an exacting aerospace standard that indicates consistent geometry and quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Drill America 27\/64 in cobalt bits are aimed at professional users and serious hobbyists who regularly drill high tensile or heat-resistant alloys such as PH stainless, inconel and titanium; they are well suited to machine shops, metal fabrication and maintenance departments that need longer life from a jobber drill bit. The set is also useful where speed and wear resistance matter, since the cobalt permits up to about 30 percent higher cutting speeds than standard HSS.\u003c\/p\u003e\n\u003cp\u003eThose who primarily drill soft materials like wood, plastics or soft mild steel and who only need occasional holes may find less advantage from cobalt bits and could choose lower cost HSS bits instead; likewise, buyers who require specialized coatings for extreme lubricity should consider coated variants made specifically for that purpose.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDurable cutting edge that holds sharpness for longer life on hard metals.\u003c\/li\u003e\n\u003cli\u003ePermits higher operating speeds than HSS, improving throughput in demanding jobs.\u003c\/li\u003e\n\u003cli\u003eRound shank and jobber length make the bits versatile for many chucks and setups.\u003c\/li\u003e\n\u003cli\u003eConsistent manufacturing to NAS 907 gives predictable performance across the pack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGold oxide is a thin treatment and offers performance similar to uncoated bits, so buyers wanting advanced coatings for reduced friction may look elsewhere.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e27\/64 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCobalt steel (heat resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e6 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank type\u003c\/td\u003e\n\u003ctd\u003eRound shank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGold oxide (thin oxide)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003eJobber length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eManufactured to National Aerospace standard 907\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Drill America 27\/64 in cobalt jobber bit pack is a solid choice for professionals who drill tough alloys and need durable, sharp bits that tolerate higher speeds. It delivers good value through longer life and consistent manufacturing, though those who want specialty coatings for extreme lubrication should shop coated options. For general metalworking and shop use this pack is a practical, cost-effective pick.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bits suitable for stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes. The cobalt steel construction increases red hardness and is especially effective for drilling stainless steel and other high tensile materials.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the gold oxide coating improve cutting life?\u003c\/strong\u003e\u003cbr\u003eThe gold oxide is a thin oxide finish mainly for identification and mild corrosion resistance; performance is similar to uncoated cobalt bits rather than advanced coated tools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these fit common drill chucks?\u003c\/strong\u003e\u003cbr\u003eYes. The round shank design allows use with a wide variety of chucks and toolholding systems.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48647748518107,"sku":"B00FX6SP3K","price":67.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71xcTcJaimL._SL1500_30b62938-2dae-4bbc-b60c-6ea2a9aedb4f.jpg?v=1778547419","url":"https:\/\/gearmusthave.com\/products\/27-64-in-cobalt-heavy-duty-drill-bit-pack-of-6-long-life-cuts","provider":"GearMustHave","version":"1.0","type":"link"}