{"title":"Taps, dies and reamers","description":"\u003cp\u003eTaps, dies and reamers for cutting threads and reworking bores.\u003c\/p\u003e\u003cp\u003eCheck the reference or the product page before ordering.\u003c\/p\u003e","products":[{"product_id":"coffret-7-tarauds-cobalt-5-7-forets-goldblack-alpha-coupe","title":"ALPHA COUPE 7 Cobalt 5% Taps + 7 Gold\u0026Black Drills Set","description":"\u003ch2\u003e7-piece 5% Cobalt tap set + 7 Gold\u0026amp;Black ALPHA COUPE drill bits: precision and performance for hard steel\u003c\/h2\u003e\u003cbr\u003e\u003cp\u003eThe \u003cstrong\u003e7-piece 5% Cobalt tap set + 7 Gold\u0026amp;Black ALPHA COUPE drill bits\u003c\/strong\u003e is built to tackle \u003cstrong\u003ehard and stainless steels\u003c\/strong\u003e without yielding.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGold\u0026amp;Black drill bits\u003c\/strong\u003e drill, and the \u003cstrong\u003e5% Cobalt taps\u003c\/strong\u003e thread: a duo designed to work fast and straight, even on the toughest materials.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003e14 tools in one single set, zero compromise on \u003cstrong\u003ecutting precision\u003c\/strong\u003e.\u003c\/p\u003e\u003ch2\u003eOverview of the ALPHA COUPE set: 7 5% Cobalt taps and 7 Gold\u0026amp;Black drill bits\u003c\/h2\u003e\u003cbr\u003e\n\n\u003cp\u003eThis set contains \u003cstrong\u003e14 tools selected for tapping and drilling hard steel\u003c\/strong\u003e. Two complementary families: taps enriched with 5% cobalt and drill bits with a Gold\u0026amp;Black coating, designed to work together on the same materials.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eALPHA COUPE 5% Cobalt taps\u003c\/strong\u003e handle stainless steels, alloy steels, and abrasive materials. The cobalt reinforces thermal resistance and delays wear of the cutting edge, even at high production rates.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGold\u0026amp;Black drill bits\u003c\/strong\u003e combine a double-layer surface treatment: the gold layer (titanium nitride) improves hardness, while the black layer reduces friction. Result: less heat, less seizing, better service life.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ch3\u003eDetailed contents of the set and available dimensions\u003c\/h3\u003e\u003cbr\u003e\n\n\u003cp\u003eThe set covers the \u003cstrong\u003e7 most common metric diameters in the workshop\u003c\/strong\u003e, from M3 to M12. Each diameter is represented by a matching drill bit and tap.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eGold\u0026amp;Black drill bits\u003c\/strong\u003e: Ø 2.5-3.3-4.2-5-6.8-8.5-10.2 mm\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003e5% Cobalt taps\u003c\/strong\u003e: M3, M4, M5, M6, M8, M10, M12\u003c\/li\u003e\n\n  \u003cli\u003eTaps with \u003cstrong\u003ecylindrical shank\u003c\/strong\u003e, ISO metric thread\u003c\/li\u003e\n\n  \u003cli\u003eDrill bits with \u003cstrong\u003ecylindrical shank\u003c\/strong\u003e, 118° point angle\u003c\/li\u003e\n\n  \u003cli\u003eRigid storage case included\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eEach drill bit is sized to prepare the hole before tapping, according to \u003cstrong\u003eISO tolerances for metric threads\u003c\/strong\u003e. No need to look up dimensions: the combination is already matched.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eFeature\u003c\/th\u003e\n\n      \u003cth\u003eALPHA COUPE Gold\u0026amp;Black Drill Bit\u003c\/th\u003e\n\n      \u003cth\u003eStandard HSS Drill Bit\u003c\/th\u003e\n\n      \u003cth\u003eClassic TiN Drill Bit\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eCoating\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eDouble layer TiN + black\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eNone\u003c\/td\u003e\n\n      \u003ctd\u003eSingle layer TiN\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eFriction reduction\u003c\/td\u003e\n\n      \u003ctd\u003eHigh\u003c\/td\u003e\n\n      \u003ctd\u003eLow\u003c\/td\u003e\n\n      \u003ctd\u003eMedium\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eThermal resistance\u003c\/td\u003e\n\n      \u003ctd\u003eGood\u003c\/td\u003e\n\n      \u003ctd\u003eLimited\u003c\/td\u003e\n\n      \u003ctd\u003eFair\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eStainless \/ alloy steel\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eNot recommended\u003c\/td\u003e\n\n      \u003ctd\u003ePartial\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eAssociated 5% Cobalt tap\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eYes (set)\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eNo\u003c\/td\u003e\n\n      \u003ctd\u003eNo\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003ch2\u003e5% Cobalt taps: why cobalt changes everything for tapping hard steel\u003c\/h2\u003e\n\u003cbr\u003e\n\n\u003cp\u003eA standard HSS tap in stainless or treated steel will break. Fast. \u003cstrong\u003e5% Cobalt (HSS-Co5)\u003c\/strong\u003e changes the game.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eAdding cobalt to the high-speed steel grade increases the tap's \u003cstrong\u003ehot hardness\u003c\/strong\u003e. When friction increases the temperature during tapping, the tool holds up. It does not blunt, it does not deform.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eConcrete result: you can tap materials that standard HSS cannot handle, \u003cstrong\u003estainless steels, treated steels, high-strength steels\u003c\/strong\u003e, and hard cast irons.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003e\u003cstrong\u003eWear resistance\u003c\/strong\u003e is also significantly higher. An HSS-Co5 tap lasts significantly longer than an HSS tap on production runs in hard steel. Less breakage, less downtime, fewer rejected parts.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eGrade\u003c\/th\u003e\n\n      \u003cth\u003eHot hardness\u003c\/th\u003e\n\n      \u003cth\u003eRecommended materials\u003c\/th\u003e\n\n      \u003cth\u003eRelative longevity\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eHSS (M2)\u003c\/td\u003e\n\n      \u003ctd\u003eLow\u003c\/td\u003e\n\n      \u003ctd\u003eMild steel, aluminum, plastics\u003c\/td\u003e\n\n      \u003ctd\u003eReference\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eHSS-Co5 (M35)\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eHigh\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eStainless, treated, high-strength steels\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003e+30 to +50 %\u003c\/strong\u003e\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eHSS-Co8 (M42)\u003c\/td\u003e\n\n      \u003ctd\u003eVery high\u003c\/td\u003e\n\n      \u003ctd\u003eSuperalloys, titanium, Inconel\u003c\/td\u003e\n\n      \u003ctd\u003e+60 to +80 %\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHSS-Co5 is the right compromise\u003c\/strong\u003e for workshops and general industry: performance on hard steel, controlled price, and immediate availability.\u003c\/p\u003e\u003ch2\u003eALPHA COUPE Gold\u0026amp;Black drill bits: coating technology and drilling advantages\u003c\/h2\u003e\u003cbr\u003e\n\n\u003cp\u003e\u003cstrong\u003eALPHA COUPE Gold\u0026amp;Black\u003c\/strong\u003e drill bits stand out due to their \u003cstrong\u003edouble-layer coating\u003c\/strong\u003e: a gold-colored titanium nitride (TiN) base combined with a black finish from a specific heat treatment. This duo provides high surface hardness and reduces friction during drilling.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eConcrete result: the heat generated during cutting is better dissipated. The cutting edge remains \u003cstrong\u003eeffective for longer\u003c\/strong\u003e, even on standard construction steels or medium-hard steels.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe geometry of these drill bits is optimized for production drilling. The \u003cstrong\u003e118° or 135°\u003c\/strong\u003e point angle, depending on the diameter, ensures precise centering and limits walking at the start of the hole.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThese drill bits are designed to work in \u003cstrong\u003edirect partnership with the 5% cobalt taps\u003c\/strong\u003e in the set. The diameter of each bit corresponds exactly to the pilot hole required for each tap: no calculations needed, no selection errors.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eFeature\u003c\/th\u003e\n\n      \u003cth\u003eALPHA COUPE Gold\u0026amp;Black drill bits\u003c\/th\u003e\n\n      \u003cth\u003eStandard HSS drill bits\u003c\/th\u003e\n\n      \u003cth\u003e5% HSS-Co drill bits (uncoated)\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eCoating\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eTiN + black treatment\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eNone\u003c\/td\u003e\n\n      \u003ctd\u003eNone\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eSurface hardness\u003c\/td\u003e\n\n      \u003ctd\u003eHigh\u003c\/td\u003e\n\n      \u003ctd\u003eLow\u003c\/td\u003e\n\n      \u003ctd\u003eMedium\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eHeat resistance\u003c\/td\u003e\n\n      \u003ctd\u003eGood\u003c\/td\u003e\n\n      \u003ctd\u003eLimited\u003c\/td\u003e\n\n      \u003ctd\u003eGood\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eRecommended steels\u003c\/td\u003e\n\n      \u003ctd\u003eUp to ~900 N\/mm²\u003c\/td\u003e\n\n      \u003ctd\u003eMild steels\u003c\/td\u003e\n\n      \u003ctd\u003eUp to ~900 N\/mm²\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eRelative service life\u003c\/td\u003e\n\n      \u003ctd\u003eHigh\u003c\/td\u003e\n\n      \u003ctd\u003eLow\u003c\/td\u003e\n\n      \u003ctd\u003eMedium to good\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eComparison: ALPHA COUPE set vs. other tap\/drill sets on the market\u003c\/h2\u003e\u003cbr\u003e\n\n\u003cp\u003eThe market offers several combined tap + drill sets. Here is how the \u003cstrong\u003e5% cobalt ALPHA COUPE set\u003c\/strong\u003e compares to common alternatives.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ch3\u003eComparative table of available cobalt tap sets\u003c\/h3\u003e\n\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eSet\u003c\/th\u003e\n\n      \u003cth\u003eTap material\u003c\/th\u003e\n\n      \u003cth\u003eDrill bit material\u003c\/th\u003e\n\n      \u003cth\u003eCobalt content\u003c\/th\u003e\n\n      \u003cth\u003eRecommended use\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eALPHA COUPE Gold\u0026amp;Black\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e5% Cobalt HSS\u003c\/td\u003e\n\n      \u003ctd\u003eGold\u0026amp;Black HSS (TiN)\u003c\/td\u003e\n\n      \u003ctd\u003e5% Co\u003c\/td\u003e\n\n      \u003ctd\u003eHard steel, stainless, resistant alloys\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eStandard HSS set (generic)\u003c\/td\u003e\n\n      \u003ctd\u003eHSS M2\u003c\/td\u003e\n\n      \u003ctd\u003eHSS M2\u003c\/td\u003e\n\n      \u003ctd\u003e0%\u003c\/td\u003e\n\n      \u003ctd\u003eMild steel, aluminum, plastic\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003e8% Cobalt HSS-E set (e.g., Ruko, Dormer)\u003c\/td\u003e\n\n      \u003ctd\u003e8% Co HSS-E\u003c\/td\u003e\n\n      \u003ctd\u003e8% Co HSS-E\u003c\/td\u003e\n\n      \u003ctd\u003e8% Co\u003c\/td\u003e\n\n      \u003ctd\u003eStainless, superalloys, titanium\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eGround HSS-G set (e.g., Bosch, Makita)\u003c\/td\u003e\n\n      \u003ctd\u003eHSS-G\u003c\/td\u003e\n\n      \u003ctd\u003eHSS-G\u003c\/td\u003e\n\n      \u003ctd\u003e0%\u003c\/td\u003e\n\n      \u003ctd\u003eStandard steel, wood, plastic\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003e\u003cstrong\u003e5% Cobalt\u003c\/strong\u003e offers a good balance between hot hardness and impact resistance. It clearly outperforms standard HSS on \u003cstrong\u003ehard steels and stainless steel\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eCompared to 8% cobalt (Ruko, Dormer), the ALPHA COUPE is slightly less capable on extreme superalloys. However, for versatile workshop use, it is often \u003cstrong\u003ebetter suited\u003c\/strong\u003e: less brittle, more tolerant to vibrations.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGold\u0026amp;Black treatment of the drill bits\u003c\/strong\u003e (titanium nitride) reduces friction and improves chip evacuation. Classic HSS-G sets do not offer this coating as standard.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eAt \u003cstrong\u003eDagobert Industrie\u003c\/strong\u003e, we offer this set for professionals who regularly work with structural steel, 304\/316 stainless, or treated steels, without investing in solid carbide tools.\u003c\/p\u003e\u003ch2\u003eApplications and compatible materials: stainless steels, treated steels, and difficult alloys\u003c\/h2\u003e\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e7-piece 5% Cobalt tap set + 7 Gold\u0026amp;Black ALPHA COUPE drill bits\u003c\/strong\u003e is designed to attack materials that resist standard tools. Hard steels, stainless, difficult alloys: this is exactly where this set makes the difference.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e5% cobalt content (HSS-Co5)\u003c\/strong\u003e of the taps improves heat resistance and hot hardness. The result: clean threads, even on \u003cstrong\u003eaustenitic stainless steel\u003c\/strong\u003e (304, 316) or treated steel with a high yield point.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eGold\u0026amp;Black drill bits\u003c\/strong\u003e combine a double-layer surface treatment, nitriding + oxidation, which reduces friction and better dissipates heat. Ideal for drilling before tapping without burning the material.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003cstrong\u003eCompatible materials:\u003c\/strong\u003e\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eStainless steels\u003c\/strong\u003e: 304, 316, duplex\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eTreated and hardened steels\u003c\/strong\u003e up to ~45 HRC\u003c\/li\u003e\n\n  \u003cli\u003eStructural steels (S235, S355) and alloy steels\u003c\/li\u003e\n\n  \u003cli\u003eGrey and malleable cast irons\u003c\/li\u003e\n\n  \u003cli\u003eNickel alloys and light refractory steels\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cbr\u003e\n\n\u003cp\u003eIn maintenance workshops, boiler making, or precision mechanics, this set meets the demands of \u003cstrong\u003etapping in difficult materials\u003c\/strong\u003e without having to juggle between different brands of tools.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ctable\u003e\n\n  \u003cthead\u003e\n\n    \u003ctr\u003e\n\n      \u003cth\u003eFeature\u003c\/th\u003e\n\n      \u003cth\u003eHSS-Co5 taps (this set)\u003c\/th\u003e\n\n      \u003cth\u003eStandard HSS taps\u003c\/th\u003e\n\n      \u003cth\u003eHSS-Co8 taps (e.g., Dormer E251)\u003c\/th\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/thead\u003e\n\n  \u003ctbody\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eCobalt content\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003e5 %\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003e0 %\u003c\/td\u003e\n\n      \u003ctd\u003e8 %\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eHot hardness\u003c\/td\u003e\n\n      \u003ctd\u003eGood\u003c\/td\u003e\n\n      \u003ctd\u003eLow\u003c\/td\u003e\n\n      \u003ctd\u003eVery good\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eStainless steel\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n      \u003ctd\u003eDifficult\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eTreated steel (\u0026lt; 45 HRC)\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n      \u003ctd\u003e✘ No\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003eMild \/ structural steel\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n      \u003ctd\u003e✔ Yes\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n      \u003ctd\u003ePerformance\/cost ratio\u003c\/td\u003e\n\n      \u003ctd\u003e\u003cstrong\u003eExcellent\u003c\/strong\u003e\u003c\/td\u003e\n\n      \u003ctd\u003eGood on mild steel\u003c\/td\u003e\n\n      \u003ctd\u003eHigh\u003c\/td\u003e\n\n    \u003c\/tr\u003e\n\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFAQ - 7-piece 5% Cobalt tap set + 7 Gold\u0026amp;Black ALPHA COUPE drill bits\u003c\/h2\u003e\u003cbr\u003e\n\n\u003ch3\u003e1. Why choose 5% cobalt taps rather than classic HSS taps?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e5% Cobalt (HSS-Co5)\u003c\/strong\u003e significantly improves heat and wear resistance compared to standard HSS.\u003c\/p\u003e\n\u003cp\u003eOn hard, stainless, or high-manganese steels, classic HSS taps blunt quickly. With cobalt, the service life is significantly longer.\u003c\/p\u003e\n\u003cbr\u003e\n\n\u003ch3\u003e2. What is the purpose of the Gold\u0026amp;Black treatment on ALPHA COUPE drill bits?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eGold\u0026amp;Black\u003c\/strong\u003e treatment combines two layers: a gold layer (titanium nitride) for hardness, and a black finish to reduce friction and adhesion.\u003c\/p\u003e\n\u003cp\u003eResult: the drill bits enter the material more easily, heat up less, and last longer than raw HSS drill bits.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ch3\u003e3. Is this set suitable for stainless steel?\u003c\/h3\u003e\n\u003cp\u003eYes, under specific conditions. \u003cstrong\u003eAustenitic stainless steel\u003c\/strong\u003e (304, 316) remains drillable and tappable with this set, provided you work at reduced speeds and with appropriate lubrication.\u003c\/p\u003e\n\u003cp\u003eFor long production runs on thick stainless steel, tools specifically dedicated to stainless steel will perform better.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ch3\u003e4. Which diameters are included in the set?\u003c\/h3\u003e\n\u003cp\u003eThe set includes \u003cstrong\u003e7 matching drill bits and 7 taps\u003c\/strong\u003e, covering common metric threads, typically from M3 to M12.\u003c\/p\u003e\n\u003cp\u003eEach drill bit is sized to prepare the pilot hole for the associated tap, the duo is ready to use with no additional calculation needed.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ch3\u003e5. Can these tools be used on a drill press or only by hand?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eALPHA COUPE Gold\u0026amp;Black\u003c\/strong\u003e drill bits can be used on a drill press, portable drill, or light milling machine.\u003c\/p\u003e\n\u003cp\u003eThe taps can be used by hand (with a tap wrench) or by machine with a torque-limiting tapping chuck. Machine tapping improves thread consistency.\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003ch3\u003e6. Is lubrication mandatory when drilling and tapping?\u003c\/h3\u003e\n\u003cp\u003eOn standard steel, lubrication is highly recommended. On hard steel or stainless steel, it becomes \u003cstrong\u003eindispensable\u003c\/strong\u003e to avoid overheating and seizing.\u003c\/p\u003e\n\u003cp\u003eAt Dagobert Industrie, we recommend using a cutting oil or a lubricant spray suitable for ferrous metals to maximize the set's service life.\u003c\/p\u003e","brand":"Alpha Coupe","offers":[{"title":"Default Title","offer_id":58480431399295,"sku":"AC_COMPO-GBX","price":176.77,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/4408\/7167\/files\/coffret-7-tarauds-cobalt-5-7-forets-goldblack-alpha-coupe.jpg?v=1789990406"}],"url":"https:\/\/dagobertindustrie.com\/en\/collections\/tarauds-filieres-et-alesoirs.oembed","provider":"Dagobert Industrie","version":"1.0","type":"link"}