{"product_id":"accupro-4500359-screw-machine-drill-bit-31-64-in-carbide","title":"Accupro 4500359 Screw Machine Drill Bit 31\/64 in Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 4500359 is a screw machine length drill bit designed for high-performance drilling in demanding materials. Built from solid carbide with a TiAlN coating, it handles the heat and abrasion common when drilling stainless steel and other hard alloys. The 140-degree web-thinned point reduces thrust and self-centers on entry, which matters when precision and hole quality are priorities. At 5.039 inches overall length with a 2.461-inch flute length, this is a stub-length geometry intended for rigidity in short-reach applications. The straight cylindrical shank measures 0.5 inches in diameter, making it compatible with standard drill chucks and collet holders.\u003c\/p\u003e\u003cp\u003eThis drill bit is sized at 31\/64 inches (0.4844 inches decimal) and is intended for use in CNC machining centers, drill presses, and rigid hand-held applications where stainless steel, hardened alloys, and other difficult workpiece materials are encountered. The coolant-through design supports high-speed production drilling where internal coolant delivery is available, improving chip evacuation and tool life. It is sold individually and is suited for machine shops, maintenance operations, and fabrication environments working with tight tolerances.\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\u003eTiAlN coating improves heat resistance and extends tool life in stainless steel applications\u003c\/li\u003e\n\u003cli\u003e140-degree R-thinned web point reduces entry thrust and improves self-centering\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports internal coolant delivery for chip evacuation in production drilling\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute geometry promotes consistent chip flow in short-reach setups\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard chucks and collet toolholding systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC machining centers and rigid drilling setups targeting stainless steels and similar hard alloys. Fits toolholders and chucks accepting a 0.5-inch straight shank. Part of the ACCUPRO ASSC140-TA-CL series, sized for the 0.45 to 0.50-inch diameter range per ISO specification designation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by machinists or qualified trades personnel familiar with cutting tool setup. Ensure the machine spindle is fully stopped and locked out before changing or seating the bit in the chuck or collet. Verify runout and shank seating before initiating a cut. When coolant-through capability is used, confirm the toolholder and spindle support internal coolant delivery to avoid dry running.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 31\/64 inches (0.4844 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.039 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.461 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5 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: Web-Thinned (R-Thinned)\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\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: ASSC140-TA-CL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: ISO\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: 4500359\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51733473034546,"sku":"4500359","price":294.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e147ffde337d8fbfa566523c2a280a47.jpg?v=1788755725","url":"https:\/\/voomisupply.com\/products\/accupro-4500359-screw-machine-drill-bit-31-64-in-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}