{"product_id":"31-64-in-cobalt-heavy-duty-drill-bit-pack-of-6-jobber-length","title":"31\/64 in Cobalt Heavy Duty Drill Bit Pack of 6 - Jobber Length","description":"\u003cp\u003eIn this review the Drill America 31\/64 in cobalt heavy duty drill bit pack is evaluated for tradespeople and metalworkers who need a durable, high-performance bit for tough alloys. The bottom line: this jobber length, heat resistant cobalt set stands out for drilling hard materials such as stainless steel, inconel and titanium and is worth considering when longevity and higher cutting speeds matter. The review focuses on build, cutting performance and value based on materials and customer feedback.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCobalt construction:\u003c\/strong\u003e The higher cobalt content raises red hardness and lets the bit run up to 30 percent faster than standard high-speed steel in demanding metals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide finish:\u003c\/strong\u003e A thin oxide surface treatment protects the flutes and makes the bits easy to identify while maintaining cutting performance similar to uncoated tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound shank:\u003c\/strong\u003e The round shank design fits a wide variety of chucks and toolholding systems for straightforward use on drill presses and hand drills.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral flute geometry:\u003c\/strong\u003e Right-hand spiral flutes evacuate chips up and out of the hole to reduce clogging when drilling deep or abrasive materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufactured to NAS 907:\u003c\/strong\u003e Built to National Aerospace standard 907, the bits offer consistent geometry and quality control suited to industrial applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Drill America 31\/64 in cobalt jobber bits are aimed at metalworkers, fabricators, maintenance techs and serious hobbyists who regularly drill high tensile alloys like PH stainless steel, inconel and titanium and need bits that hold an edge and tolerate higher cutting speeds. Their ability to run hotter and cut harder materials makes them a sensible upgrade from ordinary high-speed steel bits.\u003c\/p\u003e\u003cp\u003eThose who primarily drill soft materials, wood or occasional light-duty tasks may find cobalt bits overkill and could opt for cheaper HSS or titanium-coated options. If you need fractional sizes in quantity or specialized coatings beyond gold oxide, consider other specialty sets tailored to that use.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDurable cutting edge that lasts longer in hard alloys, offering clear value for money.\u003c\/li\u003e\n\u003cli\u003eHigher red hardness permits faster cutting speeds compared with standard HSS drills.\u003c\/li\u003e\n\u003cli\u003eRound shanks provide compatibility with many chucks and holders for easy swapping.\u003c\/li\u003e\n\u003cli\u003eManufactured to aerospace standard 907 for reliable geometry and repeatable performance.\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 limited additional wear protection compared with thicker coatings.\u003c\/li\u003e\n\u003cli\u003eJobber length may not suit very deep hole applications without extension or specialized tooling.\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 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e31\/64 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e6 bits\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\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGold oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eManufactured to NAS 907\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Drill America 31\/64 in cobalt jobber bit pack is a strong choice for professionals and serious DIYers who drill tough, high-strength metals and need longer life and higher cutting speeds than HSS provides. Given its construction, compatibility and aerospace manufacturing standard, it represents solid value for money for metalworking applications.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan these bits drill stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the cobalt composition and higher red hardness make them well suited for stainless steel and other high tensile alloys.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the gold oxide coating improve wear life?\u003c\/strong\u003e\u003cbr\u003eThe gold oxide is a thin surface treatment for identification and minor protection; it does not provide the thicker wear resistance of specialty hard coatings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre they compatible with standard drill chucks?\u003c\/strong\u003e\u003cbr\u003eYes, the round shank design fits most standard chucks and toolholding systems.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48632019976411,"sku":"B00FX6U0ZQ","price":86.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71xcTcJaimL._SL1500_6eb401dd-6a20-4ede-bc72-3adf5ac265c6.jpg?v=1778434183","url":"https:\/\/gearmusthave.com\/products\/31-64-in-cobalt-heavy-duty-drill-bit-pack-of-6-jobber-length","provider":"GearMustHave","version":"1.0","type":"link"}