{"product_id":"hertel-74132184-screw-machine-drill-bit-size-21-cobalt","title":"Hertel 74132184 Screw Machine Drill Bit Size 21 Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 74132184 is a screw machine length drill bit designed for high-productivity drilling in metal fabrication, machining, and general manufacturing applications. Built from cobalt steel and finished with a TiAlN (titanium aluminum nitride) coating, it handles hard and abrasive workpiece materials where standard high-speed steel bits wear prematurely. The bit measures 0.1590 inches in diameter (wire gauge size 21) with an overall length of 2.125 inches and a flute length of 1.0625 inches. The 135-degree split point reduces walking on entry and lowers thrust force required at the spindle. Right-hand cutting direction with a regular spiral flute pattern.\u003c\/p\u003e\u003cp\u003eScrew machine length drill bits are shorter than jobber-length bits, which increases rigidity and reduces deflection during drilling. This makes them well suited for CNC machining centers, drill presses, and screw machines working with tight tolerances in steel, stainless, cast iron, and hard alloys. The web-thinned, parallel-web configuration further reduces cutting resistance and improves chip evacuation at the point. No coolant-through capability; external coolant or cutting fluid should be applied at the cutting zone when drilling harder materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt steel construction resists heat and wear in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003eTiAlN coating extends tool life and reduces friction at elevated cutting temperatures\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces drill walking and lowers entry thrust force\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length increases rigidity and reduces deflection versus jobber-length bits\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web improves chip evacuation and reduces cutting resistance\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flute, straight-cylindrical shank fits standard drill chucks and collets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard-stock drill bit for use in any drill press, CNC machining center, or handheld drill with a straight-cylindrical shank chuck sized to accept a 0.1590-inch diameter bit.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or metalworking professional. Secure the straight-cylindrical shank firmly in the chuck or collet before operation and verify runout before beginning a cut. Apply appropriate cutting fluid or external coolant when drilling ferrous metals and hard alloys to preserve coating life. Inspect the cutting edge for wear or chipping before each use and replace the bit if the point geometry is compromised.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire Gauge)\u003c\/strong\u003e: 21\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.1590 inches\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\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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: Parallel, Web-Thinned\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: 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\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: 74132184\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51741426385202,"sku":"74132184","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/224da0a7de4cb9ef6b8b964c82f12474.jpg?v=1788831457","url":"https:\/\/voomisupply.com\/products\/hertel-74132184-screw-machine-drill-bit-size-21-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}