{"product_id":"hertel-42108-cobalt-jobber-drill-bit-13-5mm-135-deg","title":"Hertel 42108 Cobalt Jobber Drill Bit 13.5mm 135 Deg","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 42108 is a cobalt jobber-length drill bit designed for drilling through tough ferrous and non-ferrous metals in industrial and trade applications. Manufactured from M35 cobalt steel and finished with an oxide and gold coating, it handles heat and wear better than standard high-speed steel bits. The bit measures 13.5 mm (0.5315 inches) in diameter with a 135-degree split point that reduces walking on entry and requires less thrust to start a hole. Overall length is 160 mm (6.30 inches) with a flute length of 108 mm (4.25 inches). The straight cylindrical shank seats securely in standard drill chucks. It is a right-hand cutting, two-flute design with a regular spiral suited to a wide range of metal drilling tasks performed by machinists, maintenance techs, and mechanical tradespeople.\u003c\/p\u003e\u003cp\u003eThis bit is suited for production drilling and maintenance repair operations where work materials include mild steel, stainless steel, cast iron, and high-temperature alloys. The 5xD flute-to-diameter ratio provides sufficient chip clearance during deeper passes. It fits applications where a jobber-length bit is the standard reach requirement without the deflection risk of extended-length tooling. The oxide and gold coating helps reduce friction and extend cutting life across repeated use cycles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM35 cobalt steel construction for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces bit walking and lowers required entry thrust\u003c\/li\u003e\n\u003cli\u003eOxide and gold coating minimizes friction and extends tool life\u003c\/li\u003e\n\u003cli\u003eTwo-flute regular spiral design promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard drill chucks without adapters\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction compatible with conventional drill press and handheld drill operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a jobber-length drill bit for use in standard drill chucks accepting straight cylindrical shanks, suitable for drill presses, CNC drilling operations, and handheld power drills within the 12.50 mm to 15.00 mm (0.5000 to 0.6500 inch) drill bit size range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or mechanical tradespeople familiar with proper drilling speeds and feeds for cobalt tooling. Secure the shank fully in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid for the work material to extend tool life and improve hole quality. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is present.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 13.5 mm (0.5315 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 160 mm (6.30 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 108 mm (4.25 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\u003eMaterial\u003c\/strong\u003e: Cobalt (M35)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide and Gold\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\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 5xD\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: 0.18 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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 42108\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51733026406706,"sku":"42108","price":33.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e616fd29d728dff780d91980a8ed22b1.jpg?v=1788750753","url":"https:\/\/voomisupply.com\/products\/hertel-42108-cobalt-jobber-drill-bit-13-5mm-135-deg","provider":"Voomi Supply","version":"1.0","type":"link"}