{"product_id":"sumitomo-u101159-screw-machine-drill-bit-13-32-carbide","title":"Sumitomo U101159 Screw Machine Drill Bit 13\/32 Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO U101159 is a screw machine length drill bit designed for high-performance drilling in metalworking applications. Built from solid carbide with a coated finish, it delivers the hardness and wear resistance required for cutting cast iron and steel. The bit features a 135-degree split point, a straight-cylindrical shank, and a tapered web configuration. At 0.4063 inches (13\/32 inch) in diameter and 3.6614 inches in overall length, it is sized for compact, rigid setups where shorter flute length improves stability and runout control. Licensed machinists, tool and die technicians, and CNC operators are the primary installers of this bit.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for production environments and job shop machining where consistent hole quality in ferrous materials is required. The MDW-GS series screw machine length design reduces overhang and deflection in CNC machining centers, drill presses, and manual lathes. Its 2xD flute-by-diameter ratio and maximum drilling depth of 1.0047 inches make it appropriate for through-hole and blind-hole operations in cast iron and steel workpieces. The h8 diameter tolerance on the shank ensures accurate tool holder fit and reliable repeatability across multiple operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction with coated finish for wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003e135-degree drill point angle reduces thrust force and improves self-centering\u003c\/li\u003e\n\u003cli\u003eScrew machine length body minimizes deflection and improves rigidity in short-reach setups\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank with h8 tolerance for precise tool holder seating\u003c\/li\u003e\n\u003cli\u003eTapered web configuration supports chip evacuation in cast iron and steel drilling\u003c\/li\u003e\n\u003cli\u003e2-flute design rated for cast iron and steel primary workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement bit within the SUMITOMO MDW-GS series, compatible with standard straight-shank tool holders accepting a 0.4063-inch diameter shank in CNC machining centers and drill presses.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation of carbide drill bits should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is locked out before loading or changing tooling. Seat the shank fully into the tool holder collet and torque the retention mechanism per the tool holder manufacturer's specification. Carbide bits are brittle compared to high-speed steel — avoid lateral loading or interrupted cuts that can cause chipping or fracture.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Fractional)\u003c\/strong\u003e: 13\/32 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.4063 inches\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: Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.6614 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.6142 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.9685 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.0047 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0841 inches\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\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 2xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: h8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MDW-GS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 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: U101159\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51727327625522,"sku":"U101159","price":251.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/243c25d4362339868073ccf8f28ccdb9.jpg?v=1788676360","url":"https:\/\/voomisupply.com\/products\/sumitomo-u101159-screw-machine-drill-bit-13-32-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}