{"product_id":"sumitomo-u101297-extra-length-drill-bit-5-16-solid-carbide","title":"Sumitomo U101297 Extra Length Drill Bit 5\/16 Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO U101297 is a solid carbide extra length drill bit engineered for deep hole drilling applications. It measures 0.3125 inches in diameter with a 140-degree drill point angle, a 4.331-inch flute length, and a 6.496-inch overall length. The DEX coating finish extends tool life in demanding materials. A straight-cylindrical shank with a 0.3150-inch shank diameter ensures secure, concentric chuck engagement. The tapered web configuration and two-flute geometry promote chip evacuation in deep-hole work. Coolant-through capability supports high-performance drilling by delivering cutting fluid directly to the tip, reducing heat buildup and extending tool life in difficult-to-machine materials.\u003c\/p\u003e\u003cp\u003eThis drill bit is designed for deep hole drilling in ductile iron and similarly demanding ferrous materials. The MDW-XHV series targets applications where flute-to-diameter ratios of 12xD are required, meaning the flute length supports drilling depths proportional to that ratio. It is suited for production machining environments where precision tolerances and consistent chip removal are critical. Machinists and tool-and-die professionals working with CNC machining centers will find this bit appropriate for operations requiring tight diameter tolerances and extended reach into the workpiece.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction provides hardness and wear resistance for extended tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003eDEX coating finish reduces friction and heat at the cutting edge\u003c\/li\u003e\n\u003cli\u003eCoolant-through design delivers fluid directly to the drill tip during deep hole operations\u003c\/li\u003e\n\u003cli\u003e140-degree drill point angle suited for ductile iron and hard ferrous workpiece materials\u003c\/li\u003e\n\u003cli\u003eTapered web configuration supports chip flow and reduces thrust in deep hole drilling\u003c\/li\u003e\n\u003cli\u003e12xD flute-to-diameter ratio allows drilling depths up to 4.449 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC machining centers and precision drilling equipment capable of coolant-through tool delivery, within the SUMITOMO MDW-XHV series for deep hole drilling in ductile iron and similar primary workpiece materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis drill bit should be installed by a qualified machinist following the machine tool manufacturer specifications for toolholder and chuck runout. Verify coolant-through pressure settings are appropriate for the drilling depth before beginning the operation. Inspect the cutting edge and coating for damage before each use. Follow all applicable shop safety procedures and machine guarding requirements when operating drilling equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.3125 inches (5\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.496 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 4.331 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3150 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.047 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 4.449 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 12xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: DEX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.00080 to -0.00165 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Ductile Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MDW-XHV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SUMITOMO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: U101297\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51731949125938,"sku":"U101297","price":410.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1840fbce8bc58119ba1a493e4c44fc6b_230cc863-b3a5-4028-a3fb-9092852c997f.jpg?v=1788737094","url":"https:\/\/voomisupply.com\/products\/sumitomo-u101297-extra-length-drill-bit-5-16-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}