{"product_id":"sumitomo-u101183-screw-machine-drill-bit-31-64-carbide","title":"Sumitomo U101183 Screw Machine Drill Bit 31\/64 Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SUMITOMO U101183 is a screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built from solid carbide with a coated finish, this bit measures 31\/64 inch (0.4844 inches) in diameter and features a 135-degree split-point angle for accurate self-starting and reduced thrust. The straight-cylindrical shank seats securely in standard chucks and collets. With coolant-through capability and a tapered web configuration, the U101183 is suited for production environments where heat management and hole quality are critical. Licensed machinists, toolroom technicians, and CNC operators are the primary installers of this tooling.\u003c\/p\u003e\u003cp\u003eThis drill bit belongs to the MDW-HGS series and is rated for use in cast iron, stainless steel, and steel workpieces. The screw machine length profile keeps the tool compact and rigid, reducing deflection on short-reach setups and CNC machining centers. With a flute-to-diameter ratio of 3xD and a maximum drilling depth of 1.735 inches (44.07 mm), it is well matched to production drilling cycles where consistent hole geometry and tool life are priorities. It is packaged and sold individually.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction with coated finish for extended tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003e135-degree drill point angle for self-centering entry and reduced walking on hardened surfaces\u003c\/li\u003e\n\u003cli\u003eCoolant-through design channels cutting fluid directly to the cutting edge for heat control\u003c\/li\u003e\n\u003cli\u003eTapered web configuration improves chip evacuation and reduces cutting force\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank with h8 diameter tolerance for precise chuck and collet fit\u003c\/li\u003e\n\u003cli\u003eScrew machine length body provides rigidity and minimizes runout on short-reach setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in cast iron, stainless steel, and steel workpieces; fits standard drill chucks and collets accepting a 0.4844-inch straight-cylindrical shank within the MDW-HGS series range of 0.4500 to 0.5000 inches diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tooling is installed by machinists and CNC setup technicians in machine tool spindles or toolholders rated for carbide tooling. Ensure the machine spindle and chuck or collet are clean and within tolerance before seating the shank. Carbide is brittle — avoid side loads, interrupted cuts without proper feeds and speeds, or dropping the tool on hard surfaces. Confirm coolant-through passages in the holder are clear and that coolant pressure is appropriate for the application before beginning a drilling cycle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 31\/64 inch (0.4844 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\u003eDrill Point Angle\u003c\/strong\u003e: 135 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 Length\u003c\/strong\u003e: 2.4606 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.0394 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.4803 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.735 inches (44.07 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.1003 inches (2.55 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Margins\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter 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\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MDW-HGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 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: U101183\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SUMITOMO","offers":[{"title":"Default Title","offer_id":51728771219762,"sku":"U101183","price":315.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d45f7a3b605e7ae72984eff309fb8628.jpg?v=1788696064","url":"https:\/\/voomisupply.com\/products\/sumitomo-u101183-screw-machine-drill-bit-31-64-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}