{"product_id":"osg-hp258-1654-taper-length-drill-bit-0-1654-in-carbide","title":"Osg HP258-1654 Taper Length Drill Bit 0.1654 in Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG HP258-1654 is a solid carbide taper length drill bit designed for precision drilling in demanding industrial and machining applications. Featuring a 0.1654-inch (4.20 mm) cutting diameter and a 140-degree drill point angle with an R-thinned point, this bit delivers clean entry and reduces thrust in tough materials. The WD1 coating provides enhanced wear resistance for extended tool life in high-cycle production environments. At an overall length of 85.00 mm with a flute length of 45.00 mm, the HP258-1654 offers the extra reach needed for deeper hole applications beyond standard jobber-length drills. A 6.00 mm shank diameter and 8xD flute-to-diameter ratio complete the geometry. Coolant-through capability supports high-speed machining with external or internal coolant systems.\u003c\/p\u003e\n\u003cp\u003eThis taper length drill bit is suited for CNC machining centers, drill presses, and manual machines where extended reach or deeper hole depths are required. The right-hand spiral flute with regular spiral type promotes efficient chip evacuation in ferrous and non-ferrous metals, composites, and hardened alloys. It is appropriate for production shops, tool-and-die operations, aerospace fabrication, and precision metal fabrication environments where solid carbide tooling is specified for consistent hole quality and dimensional accuracy.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for high rigidity and wear resistance in demanding materials\u003c\/li\u003e\n  \u003cli\u003e140-degree drill point angle with R-thinned point for reduced thrust and accurate self-centering\u003c\/li\u003e\n  \u003cli\u003eWD1 coating for extended tool life and improved surface finish in metal cutting\u003c\/li\u003e\n  \u003cli\u003eCoolant-through design compatible with internal coolant spindle systems\u003c\/li\u003e\n  \u003cli\u003e8xD flute-to-diameter ratio provides taper length reach for deeper hole applications\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut with regular spiral flute for positive chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style taper length drill bit for use in CNC machining centers and drill presses accepting a 6.00 mm straight shank carbide drill.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify the collet or chuck size matches the 6.00 mm shank diameter before seating the drill. When using coolant-through capability, confirm the coolant system pressure and flow rate are compatible with the machine spindle before operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (Decimal Inch)\u003c\/strong\u003e: 0.1654 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (mm)\u003c\/strong\u003e: 4.20 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\u003ePoint Type\u003c\/strong\u003e: R-Thinned\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: WD1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 45.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length x Diameter Ratio\u003c\/strong\u003e: 8xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 85.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HP258\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: HP258-1654\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51729161617714,"sku":"HP258-1654","price":170.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8f6d97bec151f8b9a052452cf1730ea0.jpg?v=1788701141","url":"https:\/\/voomisupply.com\/products\/osg-hp258-1654-taper-length-drill-bit-0-1654-in-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}