{"product_id":"sgs-07391-circuit-board-drill-bit-2-9-mm-solid-carbide","title":"Sgs 07391 Circuit Board Drill Bit 2.9 Mm Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SGS 07391 is a solid carbide circuit board drill bit engineered for precision drilling in PCB fabrication and electronic assembly applications. It measures 2.9 mm (0.1142 inches) in diameter with a 1\/8-inch (3.18 mm) shank diameter and an overall length of 1.5 inches (38.10 mm). The 130-degree four-facet point geometry reduces thrust and walking at entry, which is critical when drilling into multilayer boards or composite substrates. The uncoated solid carbide construction provides the rigidity and edge retention needed for high-speed, small-diameter boring. Weighing approximately 0.1 pounds, this is a single-piece, single-use consumable tool suited for production and bench work alike.\u003c\/p\u003e\u003cp\u003eThis drill bit is rated for use in a wide range of workpiece materials including aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium. It is well-suited for electronics manufacturing, prototype board work, and precision machining environments where tight hole tolerances and clean entry are required. The heavy-duty grade designation indicates it is built for demanding drilling conditions rather than light-duty or intermittent use. Typical installations involve CNC drilling machines, PCB drill presses, or high-speed rotary spindles used by machinists and electronics technicians.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e2.9 mm (0.1142 inch) drill diameter with a tolerance of -0.0003 to +0.0000 inches for tight, repeatable hole sizing\u003c\/li\u003e\n\u003cli\u003e130-degree four-facet point reduces thrust and improves entry precision on thin or laminated substrates\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction delivers rigidity and edge retention in abrasive and hard materials\u003c\/li\u003e\n\u003cli\u003e1\/8-inch shank diameter is compatible with standard PCB drill chucks and CNC spindle tooling\u003c\/li\u003e\n\u003cli\u003eRegular spiral with 30-degree helix angle and tapered web for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eUncoated finish suitable for non-ferrous metals, composites, and polymers without coating adhesion concerns\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC PCB drilling machines and high-speed drill presses accepting a 1\/8-inch shank. Compatible workpiece materials include aluminum, cast iron, cobalt alloy, copper alloy, fiber-reinforced polymers, nickel, plastics, stainless steel, and titanium per material application codes K, M, N, P, and S.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by machinists or electronics technicians into a compatible collet or chuck accepting a 1\/8-inch shank. Ensure spindle and workpiece are fully secured before operation. Do not exceed the spindle speed rating of the machine or the manufacturer-recommended feed rate for the specific substrate material. Inspect the cutting edge before each use — solid carbide bits are brittle and should be replaced if chipping or edge wear is observed.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 2.9 mm (0.1142 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 130 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Four Facet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/8 inch (3.18 mm \/ 0.1250 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 10.16 mm (0.4000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.5 inches (38.10 mm)\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\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy-Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0003 to +0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 07391\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KYOCERA SGS PRECISION TOOLS","offers":[{"title":"Default Title","offer_id":51733536702770,"sku":"07391","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f14ada7cbcbf5ad19f498e937cb415c9.jpg?v=1788756215","url":"https:\/\/voomisupply.com\/products\/sgs-07391-circuit-board-drill-bit-2-9-mm-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}