{"product_id":"kennametal-4151284-drill-bit-21-32-inch-solid-carbide","title":"Kennametal 4151284 Drill Bit 21\/32 Inch Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4151284 is a screw machine length (stub) solid carbide drill bit designed for high-performance drilling in demanding metalworking and machining applications. Built to DIN 6537K standards, it features a 21\/32 inch (0.6562 inch) diameter, a 140-degree split point for accurate self-starting entry, and a multilayer TiAlN coating at the tip to extend tool life under heat and abrasion. The overall length is 4.8425 inches (123.00 mm), and the straight cylindrical shank measures 0.7087 inches (18.00 mm) in diameter. Coolant-through capability supports chip evacuation and thermal management during deep-hole operations. This bit is intended for installation and use by machinists, tool-and-die professionals, and CNC operators.\u003c\/p\u003e\u003cp\u003eThis drill bit fits production drilling environments where stub-length rigidity reduces deflection and improves hole quality. Its 3xD flute-to-diameter ratio and regular spiral flute geometry make it well suited for drilling steel, stainless steel, cast iron, and similar ferrous materials. The maximum drilling depth is 2.0079 inches (51.00 mm), and the flute length is 2.8740 inches (73.00 mm). It is commonly used in CNC machining centers, drill presses, and screw machine setups where consistent diameter tolerance and concentricity are required. The right-hand cutting direction is standard for conventional spindle rotation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003e140-degree point angle for accurate entry and reduced thrust force\u003c\/li\u003e\n\u003cli\u003eTiAlN tip coating extends tool life under elevated cutting temperatures\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports chip flushing and heat management in deep-hole drilling\u003c\/li\u003e\n\u003cli\u003eStub (screw machine) length reduces deflection and improves hole straightness\u003c\/li\u003e\n\u003cli\u003eDIN 6537K specification ensures dimensional consistency and interchangeability\u003c\/li\u003e\n\u003cli\u003eTapered web configuration maintains core strength while improving chip flow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use solid carbide stub drill conforming to DIN 6537K, suitable for use in standard straight-shank drill chucks and collet holders accepting a 0.7087-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or CNC technicians familiar with carbide tooling. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the straight shank in a properly sized collet or drill chuck to the chuck manufacturer's recommended torque; carbide tooling is brittle and susceptible to breakage if improperly clamped or side-loaded. Verify coolant-through lines are clear and pressurized to the machine's specified operating range before running the spindle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 21\/32 inch (0.6562 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.8425 inches (123.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.8740 inches (73.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 2.0079 inches (51.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.7087 inches (18.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.8898 inches (48.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.1137 inches (2.89 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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\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: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN (Tip)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub (Screw Machine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0007 to 0.0000 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: 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\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: 4151284\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51749397004594,"sku":"4151284","price":598.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6047723244c39e297ff48cf30f8b8e5b_348631d8-2fa2-4193-abf5-dd2b019c5a36.jpg?v=1788905556","url":"https:\/\/voomisupply.com\/products\/kennametal-4151284-drill-bit-21-32-inch-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}