{"product_id":"kennametal-4151157-solid-carbide-drill-bit-letter-g","title":"Kennametal 4151157 Solid Carbide Drill Bit Letter G","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4151157 is a solid carbide screw machine length (stub) drill bit sized to Letter G (0.2610 inches \/ 0.261 inch decimal), built for high-accuracy drilling in demanding production environments. It runs a 140-degree split-point geometry that reduces walking and lowers thrust force on entry. A multilayer TiAlN coating with a TiN tip finish extends tool life in ferrous and non-ferrous materials. At 3.1102 inches overall length with a 1.3386-inch flute, this stub-length bit delivers rigidity in short-hole drilling applications. It is installed and operated by machinists, tool-and-die tradespeople, and maintenance technicians.\u003c\/p\u003e\u003cp\u003eThe 4151157 is suited for screw machine operations, CNC machining centers, and general-purpose drill press applications where stub-length rigidity is required. The straight cylindrical shank at 0.3150 inches (8.00 mm) fits standard ER and straight-bore collet chucks. Coolant-through capability makes it effective in through-spindle coolant setups for chip evacuation and heat management in deeper hole sequences. The 3xD flute-to-diameter ratio and tapered web configuration are optimized for high-feed, short-hole cycles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in production drilling\u003c\/li\u003e\n\u003cli\u003e140-degree point angle reduces thrust and minimizes drill walk on entry\u003c\/li\u003e\n\u003cli\u003eMultilayer TiAlN coating with TiN tip finish for extended tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports through-spindle coolant delivery for chip evacuation\u003c\/li\u003e\n\u003cli\u003eTapered web configuration reduces cutting forces and improves chip flow\u003c\/li\u003e\n\u003cli\u003eDIN 6537K specification for consistent dimensional standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-series replacement and standard production tool within the KENNAMETAL B051A-CPG series, compatible with straight-bore collet chucks and ER-style toolholders accepting a 0.3150-inch (8.00 mm) straight cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or qualified tool-room technicians. Secure the shank fully within the collet or chuck before operation and verify runout before drilling. Disconnect spindle power and confirm machine is in a safe lockout state before changing or inspecting the bit. Do not exceed the rated maximum drilling depth of 0.9449 inches (24.00 mm) per pass without retracting for chip clearing.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2610 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: -0.0006 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.1102 inches (79.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.3386 inches (34.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.4173 inches (36.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3150 inches (8.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.9449 inches (24.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0439 inches (1.12 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\u003eFlute-to-Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\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: Multilayer TiAlN with TiN Tip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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 Length)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: B051A-CPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\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: 4151157\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51740120252722,"sku":"4151157","price":159.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c6d660a3dd6d9a43a95282f91a204cf0.jpg?v=1788822510","url":"https:\/\/voomisupply.com\/products\/kennametal-4151157-solid-carbide-drill-bit-letter-g","provider":"Voomi Supply","version":"1.0","type":"link"}