{"product_id":"hertel-42187-cobalt-screw-machine-drill-bit-13-64-in","title":"Hertel 42187 Cobalt Screw Machine Drill Bit 13\/64 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 42187 is a cobalt screw machine length drill bit designed for drilling into tough materials including hardened steels, heat-treatable alloy steels, stainless steel, and titanium alloy. It measures 13\/64 inch (0.2031 inches) in diameter with an overall length of 2.25 inches and a flute length of 1.1875 inches. The 135-degree split point reduces walking and cutting pressure at entry. The oxide straw finish provides light lubricity and corrosion resistance during cutting operations. This bit is used by machinists, tool-and-die technicians, and maintenance mechanics who regularly work with ferrous and exotic alloy materials.\u003c\/p\u003e\u003cp\u003eScrew machine length drill bits are shorter than jobber-length bits, which makes them more rigid and better suited for close-tolerance drilling in confined spaces, drill presses, CNC machining centers, and turret lathes. The HERTEL 42187 fits applications where shorter flute-to-diameter ratios reduce deflection and improve hole accuracy. Its 3xD flute-by-diameter ratio keeps chip evacuation efficient in the materials it is rated for. This bit is well-suited for production environments and maintenance shops that regularly encounter stainless steel or hardened workpieces where standard HSS tooling wears too quickly.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM35 cobalt steel construction for extended tool life in hardened and stainless materials\u003c\/li\u003e\n\u003cli\u003e135-degree split point for self-centering entry and reduced thrust force\u003c\/li\u003e\n\u003cli\u003eOxide straw finish for light lubricity and basic corrosion resistance\u003c\/li\u003e\n\u003cli\u003eScrew machine length body reduces deflection in tight-clearance setups\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute geometry supports consistent chip removal\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design keeps cost low for general-purpose production use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard drill chucks, drill presses, CNC machining centers, and turret lathes accepting 13\/64 inch round shank tooling. Rated for hardened materials, heat-treatable alloyed steels, stainless steel, and titanium alloy workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or tooling technician familiar with cutting speeds and feeds for cobalt tooling. Secure the workpiece firmly and verify chuck runout before drilling. Use appropriate cutting fluid for stainless steel and titanium alloy applications to reduce heat buildup. Inspect the split point for damage before each use, as a chipped point will affect entry accuracy and tool life.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 13\/64 inch (0.2031 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.1875 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\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\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M35)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating \/ Finish\u003c\/strong\u003e: Oxide Straw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Hardened Materials, Heat-Treatable Alloyed Steels, Stainless Steel, Titanium Alloy\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: 0.1 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: 42187\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51731687506226,"sku":"42187","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/493cd961f575dd2bf737acaec22fecc1.jpg?v=1788733903","url":"https:\/\/voomisupply.com\/products\/hertel-42187-cobalt-screw-machine-drill-bit-13-64-in","provider":"Voomi Supply","version":"1.0","type":"link"}