{"product_id":"niqua-77-tool-steel-burs-oval","title":"Niqua® 77 Tool Steel Burs Oval","description":"\u003cp data-path-to-node=\"1\"\u003e\u003cspan class=\"\"\u003eShape curved concave hollows,\u003c\/span\u003e blend smooth transitions, and machine organic contours in precious metal mountings without leaving flat facets or chatter marks. Manufactured to Swiss-Made standards for NIQUA, the NIQUA® SUPER Q® Oval Bur \"77\" (Ovalfräser) is a heavy-duty rotary milling and contouring cutter engineered for professional stone setters, goldsmiths, and sculptors.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eFeaturing a robust, egg-shaped elliptical cutting head with deep radial fluting and circumferential contour relief, the Series 77 bur provides smooth transitional cutting across three-dimensional curvatures. Its convex profile allows the bur to sweep across domed surfaces, hollow signet ring galleries, and large bezel cavities while maintaining continuous, low-vibration contact. Forged from premium hardened tool steel, each bur retains sharp cutting teeth and resists tool loading in gummy, ductile precious metals such as yellow gold, sterling silver, copper, brass, and related non-ferrous alloys. Fitted with an industry-standard 2.35 mm (3\/32\") shank, these large-diameter oval 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, 7.00 mm, and 8.00 mm (Art.-No. 03 240 060 to 03 240 080), 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® 77 Oval 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 Elliptical Oval Profile:\u003c\/b\u003e\u003cspan\u003e Egg-shaped geometry transitions smoothly between curved bottoms and steep sidewalls,\u003c\/span\u003e\u003cspan\u003e preventing the gouges often caused by cylindrical or sharp-edged wheel cutters.\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\"\u003eBroad Surface Contact Area:\u003c\/b\u003e\u003cspan\u003e The gentle curvature spreads milling pressure evenly across metal surfaces,\u003c\/span\u003e\u003cspan\u003e delivering clean,\u003c\/span\u003e\u003cspan\u003e homogeneous finishes and cutting hand-finishing time.\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\"\u003eDeep Swarf Evacuation Flutes:\u003c\/b\u003e\u003cspan\u003e Engineered flute gullets rapidly clear chips outward during heavy stock removal,\u003c\/span\u003e\u003cspan\u003e preventing tool clogging and galling in soft gold and silver.\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\"\u003eLow-Vibration Concentric Operation:\u003c\/b\u003e\u003cspan\u003e Precision-ground tool steel core minimizes radial runout,\u003c\/span\u003e\u003cspan\u003e eliminating chatter marks during heavy hollow milling.\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\"\u003eHardened Swiss-Quality Tool Steel:\u003c\/b\u003e\u003cspan\u003e Formulated for maximum edge retention,\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=\"5,5,0\"\u003e\u003cb data-path-to-node=\"5,5,0\" data-index-in-node=\"0\"\u003eUniversal 2.35 mm (3\/32\") Shank:\u003c\/b\u003e\u003cspan\u003e Provides seamless compatibility across standard flexible shaft handpieces,\u003c\/span\u003e\u003cspan\u003e quick-change chucks,\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\n\u003ch3 data-path-to-node=\"13\"\u003eSize Selection Guide\u003c\/h3\u003e\n\u003ctable data-path-to-node=\"14\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameter (mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eArticle Number (Art.-No.)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"14,1,0,0\"\u003e6.00 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"14,1,1,0\"\u003e03 240 060\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"14,2,0,0\"\u003e7.00 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"14,2,1,0\"\u003e03 240 070\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"14,3,0,0\"\u003e8.00 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"14,3,1,0\"\u003e03 240 080\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"NIQUA","offers":[{"title":"6.00 mm","offer_id":67993007521892,"sku":"03-240-060","price":44.34,"currency_code":"USD","in_stock":true},{"title":"8.00 mm","offer_id":67993007554660,"sku":"03-240-080","price":49.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/2902\/9732\/files\/niqua-super-q-77-oval-bur-macro.jpg?v=1793865249","url":"https:\/\/luxgoldtools.com\/products\/niqua-77-tool-steel-burs-oval","provider":"LUXGOLDTOOLS","version":"1.0","type":"link"}