{"product_id":"hertel-61699856-screw-machine-drill-bit-letter-r-hss","title":"Hertel 61699856 Screw Machine Drill Bit Letter R Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 61699856 is a screw machine length drill bit sized to Letter R (0.3390 inches), designed for general-purpose drilling in metal, wood, and plastics. Built from high-speed steel (HSS) with an oxide coating, it offers improved lubricity and corrosion resistance compared to uncoated bits. The 118-degree standard point angle suits flat or moderately curved workpiece surfaces and allows the bit to self-center without a pilot hole on most materials. At 3 inches overall length, the screw machine format keeps the bit compact and rigid, reducing deflection in production environments. Machinists, tool-and-die shops, and maintenance technicians are the primary users.\u003c\/p\u003e\u003cp\u003eScrew machine length bits are common in CNC drilling, turret lathes, and drill press applications where a shorter, stiffer tool is required. The 1-11\/16 inch flute length accommodates moderate hole depths while the 3xD flute-to-diameter ratio provides adequate chip evacuation. Right-hand cut, straight-cylindrical shank fits standard three-jaw chucks and collet holders without adapter hardware. This bit is suited to short-run and high-volume production drilling where dimensional consistency at Letter R diameter is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter R diameter (0.3390 inches) with ANSI-compliant sizing\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle for general-purpose entry on flat and curved surfaces\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for wear resistance across a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eOxide coating improves surface lubricity and reduces heat buildup at the cutting edge\u003c\/li\u003e\n\u003cli\u003eCompact screw machine length (3 inches OAL) reduces deflection and improves rigidity\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank compatible with standard chucks and collet systems\u003c\/li\u003e\n\u003cli\u003e2-flute regular spiral design for efficient chip evacuation in through and blind holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose screw machine length drill bit for use in standard three-jaw chucks, collet holders, and turret lathe tooling that accept a straight-cylindrical shank at the Letter R diameter range (0.3000 to 0.3500 inches).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or maintenance technician familiar with drilling operations. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Coolant-through is not supported on this bit; apply cutting fluid externally when drilling ferrous metals to manage heat. Follow applicable machine guarding and lockout\/tagout procedures before changing tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3390 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-11\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 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\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\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: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.13 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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 61699856\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51742188142898,"sku":"61699856","price":61.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9bc25613a6328a6586e25e37a2e00986.jpg?v=1788835883","url":"https:\/\/voomisupply.com\/products\/hertel-61699856-screw-machine-drill-bit-letter-r-hss","provider":"Voomi Supply","version":"1.0","type":"link"}