{"product_id":"sumitomo-u103709-jobber-drill-bit-letter-j-solid-carbide","title":"Sumitomo U103709 Jobber Drill Bit Letter J Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO U103709 is a jobber-length drill bit sized to Letter J (0.277 inches \/ 0.2770 decimal inch) and manufactured from solid carbide with a dual TiAlCr and TiSi coating. It is designed for high-performance metal cutting in demanding production and machining environments. The 135-degree split-point geometry reduces walking and lowers thrust requirements at entry. With an overall length of 4.2913 inches and a flute length of 2.2047 inches, this bit fits standard jobber-length toolholders. It is installed and used by machinists, tool-and-die professionals, and CNC operators working in metal fabrication and precision machining.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for cutting cast iron, stainless steel, and alloy steel in both manual and CNC drilling applications. The 5xD flute-to-diameter ratio supports deeper hole drilling relative to diameter. Coolant-through capability makes it appropriate for high-speed, high-feed operations where heat management is critical. The straight-cylindrical shank with an h8 tolerance fits precision collet chucks and drill chucks used in machining centers and drill presses. Typical use cases include production drilling in job shops, aerospace component machining, and automotive manufacturing where tight tolerances and tool life consistency are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard metal applications\u003c\/li\u003e\n\u003cli\u003eDual TiAlCr and TiSi coating for elevated heat resistance and extended tool life\u003c\/li\u003e\n\u003cli\u003e135-degree drill point angle reduces entry thrust and minimizes walking\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports high-speed and high-feed drilling operations\u003c\/li\u003e\n\u003cli\u003eTapered web configuration for improved chip evacuation and core strength\u003c\/li\u003e\n\u003cli\u003eh8 diameter tolerance on straight-cylindrical shank for precise collet fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard collet chucks and drill chucks accepting a 0.2812-inch straight-cylindrical shank, compatible with CNC machining centers and drill presses configured for jobber-length solid carbide tooling in metal cutting applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down or in a safe-stop state before changing tooling. Seat the shank fully and evenly in the collet or chuck to the recommended grip length to avoid runout. When using coolant-through capability, verify that the coolant system is connected and pressure is set according to the machine tool specification before beginning the cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: J\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2770 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish \/ Coating\u003c\/strong\u003e: TiAlCr and TiSi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.2913 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.2047 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2812 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.0866 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0574 inches\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: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: h8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Stainless Steel, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MDW-HGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Application\u003c\/strong\u003e: Metal Cutting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: U103709\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51738695926066,"sku":"U103709","price":194.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fc954162a036d05258735d41009742ce.jpg?v=1788802984","url":"https:\/\/voomisupply.com\/products\/sumitomo-u103709-jobber-drill-bit-letter-j-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}