{"product_id":"kennametal-4151739-taper-length-drill-bit-1-8-mm-carbide","title":"Kennametal 4151739 Taper Length Drill Bit 1.8 Mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4151739 is a solid carbide taper length drill bit in the B053A-CPG series, designed for precision drilling in demanding metalworking and machining applications. Built from KC7325-grade solid carbide with a multilayer TiAlN coating, the bit delivers high thermal resistance and extended tool life in abrasive and high-temperature cutting conditions. It measures 1.8 mm (0.0709 inches) in diameter with a 140-degree point angle and a spiral flute configuration that promotes efficient chip evacuation. Coolant-through capability supports deep-hole drilling while managing heat at the cutting zone. This bit is installed and operated by machinists, tool-and-die makers, and precision drilling technicians.\u003c\/p\u003e\u003cp\u003eThe 4151739 is suited for taper length drilling operations in materials requiring tight hole tolerances, including hardened steels, cast iron, stainless alloys, and similar workpiece materials. The 8xD flute-length-to-diameter ratio and straight cylindrical shank make it compatible with standard collet chucks and precision tool holders. With a maximum drilling depth of 15 mm (0.5906 inches) and a flute length of 18 mm (0.7087 inches), it fits compact CNC machining centers and drill presses requiring small-diameter through-hole capability. The tapered web configuration per DIN 6537K provides additional rigidity for consistent entry and exit geometry.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide KC7325 grade construction for wear resistance in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003eMultilayer TiAlN coating for elevated thermal resistance and extended cutting life\u003c\/li\u003e\n\u003cli\u003e140-degree standard point angle for reduced thrust and accurate hole entry\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports deep-hole drilling and chip flushing\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank at 4 mm (0.1575 inches) for secure collet or chuck retention\u003c\/li\u003e\n\u003cli\u003eTapered web per DIN 6537K standard for consistent rigidity and geometry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option within the KENNAMETAL B053A-CPG series for precision small-diameter drilling applications requiring straight cylindrical shank interface.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by qualified machinists or tooling technicians familiar with CNC or manual drilling equipment. Confirm the spindle and tool holder are fully powered down and locked out before changing tooling. Verify collet size matches the 4 mm shank diameter before seating the bit. Do not exceed the rated maximum drilling depth of 15 mm without re-evaluating chip evacuation and coolant delivery.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: B053A-CPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 1.8 mm (0.0709 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 18 mm (0.7087 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 58 mm (2.2835 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 15 mm (0.5906 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 4 mm (0.1575 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 28 mm (1.1024 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.28 mm (0.0110 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length to Diameter Ratio\u003c\/strong\u003e: 8xD\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: KC7325\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Multilayer TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.014 to 0.000 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4151739\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51738595361074,"sku":"4151739","price":253.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8b9305c0f89a7bc9da51189ff6d77898.jpg?v=1788801512","url":"https:\/\/voomisupply.com\/products\/kennametal-4151739-taper-length-drill-bit-1-8-mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}