{"product_id":"bosch-co2159b-1-2-in-x-6-in-cobalt-m42-drill-bit-with-three-flat-shank","title":"Bosch CO2159B 1\/2-in x 6-in Cobalt M42 Drill Bit with Three-Flat Shank","description":"\u003ch2\u003eOverview of the Bosch CO2159B Cobalt M42 Drill Bit\u003c\/h2\u003e\n\u003cp\u003eThe Bosch CO2159B 1\/2-in x 6-in cobalt M42 drill bit is built for demanding metalworking projects. Its upgraded M42 cobalt alloy, containing 8% cobalt, is formulated to resist heat and wear, helping you tackle hard metals with confidence. This jobber-length bit is designed to deliver consistent performance across stainless steel, cast iron, titanium, light-gauge metal, and aluminum, making it a versatile choice for shop benches and professional workstations.\u003c\/p\u003e\n\u003ch3\u003eWhy this bit stands out\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e8% cobalt alloy delivers exceptional heat resistance and extended life compared with standard bits.\u003c\/li\u003e\n  \u003cli\u003eHigh-heat endurance supports longer drilling sessions on tough metals.\u003c\/li\u003e\n  \u003cli\u003eThick web-helix design enhances stability and material removal for faster progress.\u003c\/li\u003e\n  \u003cli\u003eSplit point on sizes 1\/8 in and larger reduces walking and eliminates the need for a center punch at start.\u003c\/li\u003e\n  \u003cli\u003eThree-flat shank on 3\/16 in and larger provides a secure grip in compatible chucks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMaterial Compatibility and Use Cases\u003c\/h3\u003e\n\u003cp\u003eThese cobalt bits excel when drilling hard and abrasive metals. Expect solid results in stainless steel and cast iron, with practical applicability to titanium and other challenging alloys. Aluminum and light-gauge metal can also benefit from the bit’s durability and controlled chip removal.\u003c\/p\u003e\n\u003ch3\u003eDesign Details and Practical Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSurface-hardened tip helps initiate penetration into tough surfaces with less skating.\u003c\/li\u003e\n  \u003cli\u003eSplit point and three-flat shank features are designed to make setup and operation smoother, especially in busy workshop environments.\u003c\/li\u003e\n  \u003cli\u003eTo maximize life, pair with appropriate drill speeds and lubrication, and avoid dry, high-heat runs on very hard materials.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGetting the Most from Your CO2159B\u003c\/h3\u003e\n\u003cp\u003eFor best results, select the correct diameter and ensure the drill bit is properly secured. Use a steady feed and moderate cutting speed when working stainless steel, cast iron, or titanium. Let the bit do the work and avoid overfeeding, which can generate heat and wear. With its durable construction, this bit is designed for repeated use across multiple projects, from fabrication to maintenance tasks.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What makes the Bosch CO2159B cobalt M42 drill bit different from standard bits?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It uses an 8% cobalt M42 alloy for heat resistance and 10x longer life, plus a three-flat shank for a secure grip.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which materials are best suited for this bit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Stainless steel, cast iron, titanium, light-gauge metal, and aluminum are recommended applications.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":53087041060975,"sku":"B07Q8DPV56","price":22.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/bosch-co2159b-half-inch-by-six-inch-cobalt-m42-bit.jpg?v=1778647052","url":"https:\/\/taskholt.com\/products\/bosch-co2159b-1-2-in-x-6-in-cobalt-m42-drill-bit-with-three-flat-shank","provider":"TaskHolt","version":"1.0","type":"link"}