{"product_id":"5-cobalt-heavy-duty-drill-bit-pack-of-12-durable-jobber-drills","title":"#5 Cobalt Heavy Duty Drill Bit Pack of 12 - Durable Jobber Drills","description":"\u003cp\u003eIn this review the focus is on the Drill America #5 Cobalt Heavy Duty Drill Bit pack of 12, a jobber-length set made for cutting tougher metals. The bottom line: this pack is aimed at tradespeople and hobbyists who regularly drill stainless steel, nickel alloys or other high tensile materials and need a durable, sharp drill that tolerates higher speeds than standard high-speed steel. The single biggest reason to buy is the bit material and construction, which deliver sustained cutting performance and longer life when working on hard metals.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCobalt steel construction:\u003c\/strong\u003e Provides better red hardness for prolonged cutting life in high tensile materials compared with standard high-speed steel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide finish:\u003c\/strong\u003e A thin surface treatment that identifies the bits and offers similar performance to uncoated tools while easing chip flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound shanks:\u003c\/strong\u003e Compatible with a wide variety of toolholding systems so the bits fit most chucks and holders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight-hand spiral flute:\u003c\/strong\u003e Evacuates chips up and out of the hole when run in the counterclockwise direction to reduce clogging on deep cuts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufactured to aerospace standard:\u003c\/strong\u003e Produced to National Aerospace standard 907, indicating consistent geometry and quality control for demanding jobs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThese drill bits suit professional fabricators, machinists and serious DIYers who frequently drill through stainless steel, inconel, titanium or other high strength alloys and need a reliable, hard-wearing jobber-length bit. The pack of 12 is useful for shops that want spares and consistent performance across multiple tools.\u003c\/p\u003e\u003cp\u003eThose who primarily drill soft materials, need specialized coatings for reduced friction on high-production runs, or require non-round shanks for keyed holders may prefer other bit types. This set is not aimed at casual users who never work with high tensile metals.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh durability and sharpness from cobalt steel, giving longer life in tough metals.\u003c\/li\u003e\n\u003cli\u003eGood value for money when buying a pack of 12 for regular workshop use.\u003c\/li\u003e\n\u003cli\u003eConsistent manufacturing to aerospace standard 907 yields reliable geometry and performance.\u003c\/li\u003e\n\u003cli\u003eRound shanks and spiral flutes improve compatibility and chip evacuation on through-holes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGold oxide is a light surface treatment and offers performance similar to uncoated bits, so it may not provide the low-friction benefits of specialized coatings.\u003c\/li\u003e\n\u003cli\u003eJobber length may flex more than stub or reduced-shank types on very deep, high-precision holes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eDrill America\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eD\/ACO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCobalt steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGold oxide\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\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eManufactured to National Aerospace standard 907\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Drill America #5 cobalt jobber drill pack is a practical choice for anyone who regularly works with stainless steel or other high tensile alloys and needs durable, sharp bits that run hotter and faster than HSS. The pack offers solid value and dependable geometry to keep a shop running without frequent bit changes.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these bits good for stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the cobalt steel formulation and higher red hardness make them well suited to stainless and other hard alloys.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the gold oxide coating improve life?\u003c\/strong\u003e\u003cbr\u003eThe gold oxide is a thin surface treatment that mainly identifies the material; performance is similar to uncoated bits, so longevity comes mostly from the cobalt steel itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo these require a special chuck?\u003c\/strong\u003e\u003cbr\u003eNo, the round shanks are compatible with most common chucks and toolholding systems.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48258103476443,"sku":"B00FX6VIUC","price":42.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71bfcGlQTwL._SL1500_4e86d4bd-9034-4084-a1dd-e6b316193501.jpg?v=1778323178","url":"https:\/\/gearmusthave.com\/products\/5-cobalt-heavy-duty-drill-bit-pack-of-12-durable-jobber-drills","provider":"GearMustHave","version":"1.0","type":"link"}