{"product_id":"accupro-4500172-jobber-drill-letter-u-solid-carbide","title":"Accupro 4500172 Jobber Drill Letter U Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 4500172 is a solid carbide jobber-length drill bit sized to Letter U (0.3680 inches decimal) with a 140-degree split point and a TiAlN coating. Designed for high-performance drilling in demanding materials, it features a right-hand cutting direction, regular spiral fluting with web thinning (R-Thinned), and a straight cylindrical shank measuring 25\/64 inch (0.3906 inches decimal). The overall length is 5-23\/64 inches (5.3594 inches decimal), and the flute length is 3 inches. Coolant-through capability supports chip evacuation and heat management during deep or high-feed operations. This bit is intended for use by machinists and metalworking professionals in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThe 4500172 is optimized for drilling stainless steel and other hard ferrous and non-ferrous alloys where heat buildup and tool wear are primary concerns. The TiAlN coating provides oxidation resistance at elevated cutting temperatures, extending tool life in interrupted cuts and continuous drilling cycles. The 5xD flute-to-diameter ratio makes it well suited for moderate-depth holes where chip clearance and rigidity are both required. Typical applications include aerospace, automotive, and general precision machining operations on stainless steel and similar hard metals.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter U size (0.3680 inches decimal) within the 0.3500 to 0.4000 inch drill size range\u003c\/li\u003e\n\u003cli\u003e140-degree proprietary point geometry reduces thrust and improves self-centering on hard materials\u003c\/li\u003e\n\u003cli\u003eTiAlN coating provides heat and oxidation resistance for extended tool life in stainless steel\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports chip flushing and temperature control during drilling\u003c\/li\u003e\n\u003cli\u003eR-Thinned web reduces cutting forces and improves penetration rates\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank (25\/64 inch) compatible with standard drill chucks and collet systems\u003c\/li\u003e\n\u003cli\u003eISO specification designation; high-performance carbide grade\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a high-performance solid carbide jobber drill for use in standard drill chucks and collet holders accepting a 25\/64-inch (0.3906-inch decimal) straight shank; primary workpiece material is stainless steel.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by a qualified machinist following standard metalworking safety practices. Secure the shank fully in a properly sized chuck or collet before operation, and verify spindle runout is within acceptable limits to protect the carbide substrate. When drilling stainless steel, engage coolant-through or external flood coolant from the start of the cut to prevent work hardening and premature edge failure. Do not use this bit in hammer or percussion mode.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: U\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3680 inches\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: Proprietary\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: High Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3 inches (76.20 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: R-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 25\/64 inch (0.3906 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5-23\/64 inches (5.3594 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241634\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: ACCUPRO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4500172\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51739533672754,"sku":"4500172","price":196.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3911fe4bea0896d3e3d30cbe3d490fca.jpg?v=1788815845","url":"https:\/\/voomisupply.com\/products\/accupro-4500172-jobber-drill-letter-u-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}