{"product_id":"guhring-9039700063500-spiral-flute-tap-1-4-20-unc","title":"Guhring 9039700063500 Spiral Flute Tap 1\/4-20 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9039700063500 is a spiral flute tap designed for blind hole threading in aluminum and aluminum alloy. Part of the Series 3970 line, it cuts a 1\/4-20 UNC right-hand thread to a 2B class of fit. The cobalt construction with MolyGlide finish handles the galling tendencies common when threading soft, sticky aluminum. The 45-degree helix angle drives chips up and out of the hole, which is critical in blind applications where chip packing causes tap breakage. This tap is installed by machinists and maintenance professionals working in production or field environments.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for blind hole threading in aluminum and aluminum alloy workpieces where chip evacuation is the primary concern. The modified bottoming chamfer allows threading closer to the bottom of a blind bore than a plug or taper chamfer would permit. At 2.382 inches overall length with a 0.255-inch shank diameter, it fits standard tap holders and machine spindles used in CNC machining centers, drill presses, and tapping machines. Thread limit H4 and H5 accommodate standard 2B tolerance requirements in most aluminum threading applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e45-degree helix angle evacuates chips upward out of blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer threads closer to blind hole bottom than plug chamfer\u003c\/li\u003e\n  \u003cli\u003eCobalt construction provides heat and wear resistance over high-speed steel\u003c\/li\u003e\n  \u003cli\u003eMolyGlide finish reduces friction and built-up edge when cutting aluminum\u003c\/li\u003e\n  \u003cli\u003eH4 and H5 thread limits support 2B class of fit tolerance\u003c\/li\u003e\n  \u003cli\u003eRight-hand flute and right-hand thread for standard tapping operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for blind hole threading in aluminum and aluminum alloy. Cuts 1\/4-20 UNC threads to a 2B class of fit. Compatible with standard tap holders and spindles accepting a 0.255-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMachinists and maintenance technicians install spiral flute taps using tapping machines, CNC machining centers, or hand-tap wrenches. Ensure the workpiece is securely fixtured before tapping. Use a cutting fluid appropriate for aluminum to supplement the MolyGlide finish and extend tool life. Never reverse a tap under power without confirming the machine is set to reverse; forcing a tap in the wrong direction or without chip clearance in a blind hole will cause breakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H4, H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.382 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.181 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.191 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: MolyGlide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum and Aluminum Alloy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 3970\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.013 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: GUHRING\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 9039700063500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51737822363954,"sku":"9039700063500","price":45.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7e3baa4abb27101e6641fb01a544a0f0_de831384-4ae8-4728-8f94-3cb55a1827ff.jpg?v=1788793962","url":"https:\/\/voomisupply.com\/products\/guhring-9039700063500-spiral-flute-tap-1-4-20-unc","provider":"Voomi Supply","version":"1.0","type":"link"}