{"product_id":"kennametal-4148588-3-4-inch-carbide-stub-drill-bit","title":"Kennametal 4148588 3\/4 Inch Carbide Stub Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4148588 is a stub-length (screw machine length) solid carbide drill bit designed for high-performance drilling in demanding machining environments. It features a 3\/4 inch (0.7500 inch) diameter with a 140-degree split point for reduced thrust and self-centering entry. The multilayer TiAlN coating at the tip extends tool life in abrasive and high-temperature cutting conditions. Overall length is 5.1575 inches (131.00 mm), with a flute length of 3.1102 inches (79.00 mm) and a maximum drilling depth of 2.1654 inches (55.00 mm). It is part of the Series B051A-CPG and conforms to DIN 6537K specification. Machinists and toolroom technicians install this bit in CNC machining centers, drill presses, and screw machines where rigidity and dimensional accuracy are required.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for production drilling applications in metal fabrication shops, job shops, and manufacturing facilities. The stub-length body reduces overhang and deflection compared to jobber-length bits, making it a strong choice when drilling into steel, cast iron, stainless, and similar ferrous materials at high feed rates. The coolant-through design allows internal delivery of cutting fluid directly to the cutting edge, improving chip evacuation and extending tool life in deep-hole or interrupted-cut scenarios. The 3xD flute-to-diameter ratio supports efficient chip clearance in short-hole applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard materials\u003c\/li\u003e\n\u003cli\u003e140-degree standard point angle reduces entry thrust and improves self-centering\u003c\/li\u003e\n\u003cli\u003eTiAlN multilayer coating at tip extends life in abrasive, high-heat cutting conditions\u003c\/li\u003e\n\u003cli\u003eCoolant-through design enables internal cutting fluid delivery for improved chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank (0.7874 inch \/ 20.00 mm diameter) for secure chuck or collet holding\u003c\/li\u003e\n\u003cli\u003eConforms to DIN 6537K specification with diameter tolerance of +0.0000 to -0.0008 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-specification stub-length drill bit in the KENNAMETAL B051A-CPG series, suitable for use in CNC machining centers and drill presses equipped with standard straight-shank toolholders or collet chucks accepting a 0.7874 inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes must be performed with the machine fully powered down and spindle at a complete stop. Ensure the toolholder or collet chuck is rated for the 0.7874 inch shank diameter before mounting. Machining professionals should verify feed rate, spindle speed, and coolant supply settings per their shop's established parameters for the workpiece material before beginning a drilling cycle. Follow applicable shop safety standards and machine manufacturer guidelines throughout setup.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.1575 inches (131.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.1102 inches (79.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 2.1654 inches (55.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.7874 inches (20.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.9685 inches (50.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.1304 inches (3.31 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\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\u003eCoating\u003c\/strong\u003e: TiAlN Multilayer (TiN Tip)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub (Screw Machine Length)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0008 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: B051A-CPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.24 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: 4148588\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51753051259186,"sku":"4148588","price":793.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6047723244c39e297ff48cf30f8b8e5b_3d928fa2-5a9d-4ffb-a1d2-4f84b9edcef5.jpg?v=1788932443","url":"https:\/\/voomisupply.com\/products\/kennametal-4148588-3-4-inch-carbide-stub-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}