{"product_id":"hertel-66693474-screw-machine-drill-bit-letter-j-hss-tin","title":"Hertel 66693474 Screw Machine Drill Bit Letter J Hss Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 66693474 is a screw machine length drill bit sized to Letter J (0.2770 inches decimal), designed for high-production drilling in metal fabrication, machining, and maintenance applications. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction in ferrous and non-ferrous materials. The 135-degree split point starts on contact without a center punch and reduces walking on smooth surfaces. At 2-11\/16 inches overall length, the screw machine format provides added rigidity over jobber-length bits, making it well suited to drill press and CNC turret work where stub-length stiffness is needed.\u003c\/p\u003e\n\u003cp\u003eThis bit is used in production environments where hole consistency and reduced cycle time matter. The right-hand spiral flute with regular helix efficiently evacuates chips in through-hole and blind-hole drilling operations. Web-thinned geometry with a parallel web configuration reduces thrust load. It fits any drill press, turret, or hand drill with a straight chuck accepting a 0.2770-inch straight-cylindrical shank. Heavy-duty grade construction handles interrupted cuts and tougher workpiece materials without premature edge breakdown.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter J size  -  0.2770 inches decimal diameter for precise hole sizing\u003c\/li\u003e\n  \u003cli\u003e135-degree split point starts on contact, reduces thrust and eliminates center-punch step\u003c\/li\u003e\n  \u003cli\u003eTiN coating extends cutting edge life and lowers friction heat in metal drilling\u003c\/li\u003e\n  \u003cli\u003eScrew machine (stub) length  -  2-11\/16 inches OAL for increased rigidity over jobber bits\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web reduces axial load and improves chip flow\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty grade HSS construction rated for production and interrupted-cut use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or production-grade substitute for Letter J screw machine length drill bits used in standard straight-shank drill chucks across drill presses, CNC turrets, and hand-held power drills.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists, tool-and-die trades, and maintenance technicians. Secure the straight-cylindrical shank fully in a keyed or keyless chuck before operation and verify runout before high-tolerance drilling. Disengage and de-energize the machine before changing bits. Do not exceed the recommended feed rate for the workpiece material  -  excessive feed pressure will chip the TiN coating and collapse the split point prematurely.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: Letter J\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDecimal Size\u003c\/strong\u003e: 0.2770 inches\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\u003eTool Material\u003c\/strong\u003e: High-Speed Steel (HSS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\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\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\u003eShank Diameter\u003c\/strong\u003e: 0.2770 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel 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 Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.2500 to 0.3000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 66693474\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51739934425394,"sku":"66693474","price":16.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2ca341ec5795a840832d1cc96639d155.jpg?v=1788820521","url":"https:\/\/voomisupply.com\/products\/hertel-66693474-screw-machine-drill-bit-letter-j-hss-tin","provider":"Voomi Supply","version":"1.0","type":"link"}