{"product_id":"niqua-78-tool-steel-burs-rounded-cylinder","title":"Niqua® 78 Tool Steel Burs Rounded Cylinder","description":"\u003cp data-path-to-node=\"1\"\u003eMill true flat surfaces, shape smooth radius transitions, and prepare contoured gemstone seats without gouging sharp internal corners. Manufactured to strict Swiss-Made standards for NIQUA, the NIQUA® SUPER Q® Rounded Cylinder Bur \"78\" (Walzenrundfräser \/ Bull-Nose Cylinder) is a heavy-duty rotary milling and finishing cutter engineered for professional goldsmiths, gemstone setters, and precision jewelry fabricators.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eCombining the lateral squaring capacity of a standard cylindrical bur with the soft transitional blending of a hemispherical ball end, the Series 78 \"bull-nose\" geometry is an essential problem-solver at the jewelry bench. The rounded nose cuts gentle radius transitions on cavity floors and bezel shoulders, while the straight cylindrical flank levels vertical walls and guides straight linear passes without digging or chattering. Forged from premium hardened tool steel, each bur delivers clean chip evacuation and dependable edge retention in soft, ductile alloys including yellow gold, sterling silver, copper, brass, and related non-ferrous metals. Fitted with an industry-standard 2.35 mm (3\/32\") shank, these large rounded cylinder burs mount directly into jeweler flexible shaft handpieces, heavy-duty bench micromotors, and quick-change chuck systems. Available in substantial finishing diameters of 6.00 mm and 8.00 mm (Art.-No. 03 246 060 and 03 246 080), each size is packaged in a protective bench storage box containing 6 pieces.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"4\"\u003eWhy Choose NIQUA® SUPER Q® 78 Rounded Cylinder Burs\u003c\/h3\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-path-to-node=\"5,0,0\" data-index-in-node=\"0\"\u003eDistinctive Bull-Nose (Rounded Cylinder) Geometry:\u003c\/b\u003e\u003cspan\u003e Features a straight cylindrical body terminating in a smoothly rounded dome tip,\u003c\/span\u003e\u003cspan\u003e milling flat-bottom recesses while leaving rounded transitional corners.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,0\"\u003e\u003cb data-path-to-node=\"5,1,0\" data-index-in-node=\"0\"\u003eEliminates Gouging \u0026amp; Stress Risers:\u003c\/b\u003e\u003cspan\u003e The rounded end radius prevents the sharp corner gouges commonly produced by square-ended end mills,\u003c\/span\u003e\u003cspan\u003e protecting structural integrity inside setting cavities.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,2,0\"\u003e\u003cb data-path-to-node=\"5,2,0\" data-index-in-node=\"0\"\u003eDual-Action Milling:\u003c\/b\u003e\u003cspan\u003e Uses the domed nose for curved surface contouring and concave cavity clearing,\u003c\/span\u003e\u003cspan\u003e and the straight cylindrical flank for trueing vertical walls and channel rails.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,3,0\"\u003e\u003cb data-path-to-node=\"5,3,0\" data-index-in-node=\"0\"\u003eDeep Swarf Evacuation Flutes:\u003c\/b\u003e\u003cspan\u003e Precision-ground flutes clear ductile metal shavings quickly outward during heavy stock removal,\u003c\/span\u003e\u003cspan\u003e preventing tool loading and galling in gold and silver.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,4,0\"\u003e\u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"0\"\u003eLow-Vibration Concentric Operation:\u003c\/b\u003e\u003cspan\u003e Precision-ground Swiss tool steel core minimizes radial runout,\u003c\/span\u003e\u003cspan\u003e ensuring steady handpiece tracking and smooth,\u003c\/span\u003e\u003cspan\u003e chatter-free cuts.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,5,0\"\u003e\u003cb data-path-to-node=\"5,5,0\" data-index-in-node=\"0\"\u003eHardened Swiss-Quality Tool Steel:\u003c\/b\u003e\u003cspan\u003e Provides edge sharpness,\u003c\/span\u003e\u003cspan\u003e wear resistance,\u003c\/span\u003e\u003cspan\u003e and long service life across continuous workshop use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,6,0\"\u003e\u003cb data-path-to-node=\"5,6,0\" data-index-in-node=\"0\"\u003eUniversal 2.35 mm (3\/32\") Shank:\u003c\/b\u003e\u003cspan\u003e Provides seamless compatibility across standard flexible shaft systems,\u003c\/span\u003e\u003cspan\u003e quick-change handpieces,\u003c\/span\u003e\u003cspan\u003e and laboratory micromotors without collet adapters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NIQUA","offers":[{"title":"6.00 mm","offer_id":67993323602020,"sku":"03-246-060","price":44.34,"currency_code":"USD","in_stock":true},{"title":"8.00 mm","offer_id":67993323634788,"sku":"03-246-080","price":49.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/2902\/9732\/files\/niqua-super-q-78-rounded-cylinder-bur-macro.jpg?v=1793868827","url":"https:\/\/luxgoldtools.com\/products\/niqua-78-tool-steel-burs-rounded-cylinder","provider":"LUXGOLDTOOLS","version":"1.0","type":"link"}