{"product_id":"accupro-4500428-screw-machine-drill-bit-12mm-carbide","title":"Accupro 4500428 Screw Machine Drill Bit 12mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 4500428 is a screw machine length drill bit designed for high-performance drilling in demanding materials. Built from solid carbide with a TiAlN coating, it delivers extended tool life and heat resistance in production and job-shop environments. The 12.00 mm diameter bit features a 140-degree split point with R-thinned web for improved centering and reduced thrust. Overall length is 102.00 mm with a 55.00 mm flute length, offering the short, rigid profile that screw machine and CNC applications require. Coolant-through capability supports chip evacuation and thermal management during deep or interrupted cuts. Weighing 0.17 pounds, it ships individually.\u003c\/p\u003e\u003cp\u003eThis drill bit is optimized for stainless steel as the primary workpiece material, where carbide substrate and TiAlN coating resist the work-hardening and galling common in austenitic grades. It is suited for use in CNC machining centers, screw machines, and turret lathes running at the higher surface speeds that solid carbide enables. The straight-cylindrical shank at 12.00 mm (0.4724 inch) fits standard collet chucks and drill chucks in that bore range. The 3xD flute-to-diameter ratio supports chip clearance at moderate depth-to-diameter ratios typical of through-hole and blind-hole operations in stainless and other ferrous alloys.\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\u003eTiAlN coating for high heat resistance and extended tool life at elevated cutting speeds\u003c\/li\u003e\n\u003cli\u003e140-degree split point with R-thinned web reduces thrust and improves hole entry accuracy\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports chip flushing and heat control in deep drilling operations\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank for compatibility with standard collets and drill chucks\u003c\/li\u003e\n\u003cli\u003eShort screw machine length profile provides rigidity, reducing deflection in production setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit drill bit for CNC machining centers and screw machines accepting a 12.00 mm straight-cylindrical shank, conforming to DIN specification standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or toolroom technician familiar with carbide tooling. Secure the shank fully in a properly sized collet or drill chuck before operation and verify runout is within acceptable limits for the application. Solid carbide tooling is brittle and susceptible to breakage from lateral load or interrupted cuts without proper setup. Always engage coolant flow before the tool contacts the workpiece when using the through-coolant feature.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 12.00 mm (0.4724 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 102.00 mm (4.0157 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 55.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 12.00 mm (0.4724 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\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\u003c\/strong\u003e: TiAlN\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: DIN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Special\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 4500428\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51744979353906,"sku":"4500428","price":225.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/795c41156a07cdab669a91657f6b76e8_16fab6b4-d9a0-4479-9e5a-617fa0088bfa.jpg?v=1788862933","url":"https:\/\/voomisupply.com\/products\/accupro-4500428-screw-machine-drill-bit-12mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}