{"product_id":"chicago-latrobe-49089-screw-machine-drill-bit-0-166-in-hss","title":"Chicago-latrobe 49089 Screw Machine Drill Bit 0.166 in Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CHICAGO-LATROBE 49089 is a screw machine length drill bit designed for general-purpose drilling in a wide range of materials. Built from high speed steel with a bright, uncoated finish, this bit features a left-hand spiral flute configuration and a standard 118-degree split point. The shorter screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection in production and machine-tool environments. With a wire gauge size of No. 19 and a decimal diameter of 0.1660 inches, it fits standard straight-cylindrical chucks and collets. Web-thinned geometry lowers the thrust force required at entry and helps maintain accuracy across repeated cycles.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for use in drill presses, CNC machining centers, screw machines, and manual lathes where a short, stiff bit profile is preferred. Primary workpiece materials include aluminum, copper, magnesium, slate, thermoplastic, and wood. The left-hand cut direction makes it well suited for removing broken fasteners or reverse-threading operations. It is a single-piece unit sold individually and fits within the 0.1500 to 0.2000 inch diameter range of the Series 157L line.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft-hand spiral flute cut for reverse-rotation drilling and broken fastener extraction\u003c\/li\u003e\n  \u003cli\u003e118-degree standard point angle with web-thinned tip for reduced entry thrust\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction for general-purpose durability across multiple materials\u003c\/li\u003e\n  \u003cli\u003eScrew machine length body provides increased rigidity and reduced deflection\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard drill chucks and collets without adapters\u003c\/li\u003e\n  \u003cli\u003eManufactured to ISO standards with a diameter tolerance of +0.0000 to -0.0007 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose replacement or production-use drill bit for applications requiring a No. 19 wire gauge, 0.1660-inch diameter, left-hand cut screw machine length bit in aluminum, copper, magnesium, slate, thermoplastic, or wood workpieces.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists and tool-and-die or maintenance technicians operating drill presses, lathes, or CNC equipment. Secure the straight-cylindrical shank fully in the chuck or collet before operation and confirm the spindle rotation direction matches the left-hand cut orientation of the bit. Inspect the cutting edges and web condition before each use; discard or resharpen if chipping or dulling is present. Follow applicable shop safety and machine guarding standards when operating rotating tooling.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.1660 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Gauge Size\u003c\/strong\u003e: No. 19\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.0625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0007 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Aluminum, Copper, Magnesium, Slate, Thermoplastic, Wood\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 157L\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Screw Machine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ISO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.011 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: CHICAGO-LATROBE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 49089\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHICAGO-LATROBE","offers":[{"title":"Default Title","offer_id":51727792013618,"sku":"49089","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a521579e46642c73736eff90a2ec39c3.jpg?v=1788682475","url":"https:\/\/voomisupply.com\/products\/chicago-latrobe-49089-screw-machine-drill-bit-0-166-in-hss","provider":"Voomi Supply","version":"1.0","type":"link"}