{"product_id":"hertel-74131988-drill-bit-letter-y-cobalt-tialn-135-deg","title":"Hertel 74131988 Drill Bit Letter Y Cobalt Tialn 135 Deg","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 74131988 is a screw machine length drill bit sized to Letter Y (0.4040 inches decimal equivalent), designed for high-productivity drilling in metalworking and machining applications. Built from cobalt high-speed steel and coated with TiAlN (titanium aluminum nitride), this bit handles elevated cutting temperatures and abrasive materials without rapid edge breakdown. The 135-degree split point reduces thrust load on entry and self-centers without a pilot hole. Overall length is 3-5\/16 inches, keeping the bit rigid and reducing deflection in short-reach setups. Installation and operation are handled by machinists, tool-and-die professionals, and maintenance mechanics working on manual or CNC drill presses, mills, and lathes.\u003c\/p\u003e\u003cp\u003eThis bit is suited for production drilling in ferrous metals including alloy steels, stainless steel, cast iron, and hardened materials where standard HSS bits wear prematurely. The screw machine length profile  -  shorter than jobber length  -  provides added stiffness, making it the preferred choice for drill press work, turret lathes, screw machines, and CNC machining centers where tool overhang must be minimized. The right-hand spiral flute evacuates chips efficiently during through-hole and blind-hole drilling at standard to elevated feed rates.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter Y size  -  0.4040 inches decimal equivalent for precise hole sizing\u003c\/li\u003e\n\u003cli\u003eCobalt construction provides heat and wear resistance beyond standard HSS\u003c\/li\u003e\n\u003cli\u003eTiAlN coating extends tool life when cutting alloy steels and stainless\u003c\/li\u003e\n\u003cli\u003e135-degree split point self-centers and reduces drill thrust on entry\u003c\/li\u003e\n\u003cli\u003eScrew machine (stub) length at 3-5\/16 inches OAL improves rigidity and reduces deflection\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web design lowers cutting resistance and improves chip flow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard straight-shank drill chucks on drill presses, manual lathes, turret lathes, CNC machining centers, and screw machines accepting straight-cylindrical shank tooling in the 0.4000 to 0.4500 inch diameter range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eAlways power down and lock out the machine spindle before changing tooling. Secure the straight-cylindrical shank firmly in a properly sized drill chuck or collet to prevent slippage under load. Cobalt bits with TiAlN coating perform best with appropriate cutting fluid or coolant for the workpiece material  -  consult the material manufacturer or machining data reference for recommended speeds and feeds. Inspect the cutting edge and point for chipping or wear before each use; a damaged split point will cause off-center entry and oversize holes.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: Letter Y\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecimal Equivalent\u003c\/strong\u003e: 0.4040 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split\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: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-15\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.4000 to 0.4500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 74131988\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51739729297714,"sku":"74131988","price":26.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5bbc374e9f98935937fc7fa58f5eb025.jpg?v=1788818286","url":"https:\/\/voomisupply.com\/products\/hertel-74131988-drill-bit-letter-y-cobalt-tialn-135-deg","provider":"Voomi Supply","version":"1.0","type":"link"}