{"product_id":"hertel-79892220-solid-carbide-jobber-drill-bit-no-21","title":"Hertel 79892220 Solid Carbide Jobber Drill Bit No. 21","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 79892220 is a solid carbide jobber length drill bit sized to No. 21 wire gauge (0.1590 inches diameter) with a 118-degree standard point angle. Built to C2 carbide material grade, it delivers the rigidity and heat resistance needed for drilling hard materials at high cycle counts. The bright finish leaves the carbide uncoated for direct heat dissipation. At 2.5 inches overall length with a 1.375-inch spiral flute, it fits standard drill chucks and CNC toolholders in light to medium production environments. Installed by machinists, tool-and-die techs, and maintenance tradespeople running manual or CNC drilling operations.\u003c\/p\u003e\u003cp\u003eThis drill bit suits precision drilling in metal fabrication, maintenance-repair-operations (MRO), and light manufacturing. The No. 21 wire-gauge diameter is commonly used for tap-drill and clearance-hole applications on small fasteners. The right-hand cut and regular spiral flute geometry handle a broad range of ferrous and non-ferrous materials. Web-thinned geometry reduces thrust force at drill entry, which is especially useful when drilling by hand or on lower-horsepower spindles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction, C2 material grade for extended tool life in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003eNo. 21 wire size, 0.1590-inch diameter with a tight tolerance of -0.0005 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle with web-thinned, tapered web configuration for reduced entry thrust\u003c\/li\u003e\n\u003cli\u003eBright (uncoated) finish maintains sharp cutting edge geometry out of the box\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, 2-flute regular spiral for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank at 0.1590 inches fits standard drill chucks and collets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a jobber-length replacement drill bit for No. 21 wire gauge applications in standard drill chucks, CNC machining centers, and benchtop drill presses accepting a 0.1590-inch straight shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or maintenance tradespeople familiar with cutting tool setup. Secure the straight-cylindrical shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Always power down and de-energize the spindle before changing tooling. Do not exceed the recommended speed-and-feed range for the workpiece material and machine horsepower.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 21\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.1590 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0005 to 0.0000 inches\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: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.375 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 Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.1590 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\/Coating\u003c\/strong\u003e: Bright (Uncoated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: High Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241634\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 79892220\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51731013042482,"sku":"79892220","price":48.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/01cdd9b74a09b384413a7b099f26ce6d.jpg?v=1788725848","url":"https:\/\/voomisupply.com\/products\/hertel-79892220-solid-carbide-jobber-drill-bit-no-21","provider":"Voomi Supply","version":"1.0","type":"link"}