{"product_id":"21-64-cobalt-split-point-stub-drill-bit_d-astco21-64","title":"21\/64\" Stub Drill Bit | Cobalt | Split Point | D\/ASTCO21\/64 (6 \/ Pkg.)","description":"\u003cdiv\u003e\n\u003cp\u003e[6 PKG] 21\/64\" Cobalt Split Point Stub Drill Bit is a cobalt-alloy high-speed steel bit designed for demanding metalworking tasks. This description provides the key specs, practical features, and physical attributes to help you evaluate its fit for your projects.\u003c\/p\u003e \u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 21\/64 in (0.3281 in)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: HSS cobalt alloy (cobalt‑enhanced high‑speed steel)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTip\u003c\/strong\u003e: Split point for self-centering start\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: Stub drill length (short overall length)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePack\u003c\/strong\u003e: 6 pieces per package\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSplit-point tip\u003c\/strong\u003e: Self-centering and reduces walking when starting holes, minimizing need for center punching\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCobalt alloy\u003c\/strong\u003e: Improves red-hardness and heat resistance for sustained cutting life in hard metals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStub length\u003c\/strong\u003e: Increased rigidity and reduced deflection in tight spaces or plunging work\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChipping and heat management\u003c\/strong\u003e: Flute geometry supports efficient chip evacuation and temperature control during drilling\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMetalworking priority\u003c\/strong\u003e: Well-suited for stainless steel, hardened alloys, cast iron, and other tough metals\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePhysical\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePack size\u003c\/strong\u003e: 6 bits per package\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBit construction\u003c\/strong\u003e: Cobalt‑based HSS construction with a stub geometry for rigidity\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntended use scenario\u003c\/strong\u003e: Precision drilling in metalworking environments where starting accuracy and heat resistance matter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":52323777118487,"sku":"D\/ASTCO21\/64","price":32.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/d-astco3-64_1c727ed1-0c7c-4970-99f4-df9a534e228f.jpg?v=1771981494","url":"https:\/\/mutualscrew.com\/products\/21-64-cobalt-split-point-stub-drill-bit_d-astco21-64","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}