{"product_id":"value-collection-20870-r-letter-r-hss-mechanics-drill-bit","title":"Value Collection -20870-R Letter R Hss Mechanics Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION -20870-R is a Letter R mechanics drill bit designed for general-purpose drilling in metal and ferrous materials. It measures 0.3390 inches in diameter and features a 135-degree split point that reduces walking on contact, allowing the bit to self-center without a punch mark. The oxide-coated high-speed steel body handles the heat generated during drilling in tough materials. The Weldon flat shank with three flats locks securely into compatible chuck holders, preventing slippage under torque. This bit is well-suited for use by machinists, maintenance techs, and metal fabricators working in shop or field environments.\u003c\/p\u003e\n\u003cp\u003eThe -20870-R is sized for Letter R applications commonly encountered when drilling clearance or tap holes in carbon steel, cast iron, high alloy steel, stainless steel, and high tensile strength alloy stock. Its mechanics-length body keeps the tool compact and stiff for close-quarters or drill-press work. The spiral flute geometry evacuates chips efficiently during through-hole and blind-hole drilling. The web-thinned, parallel web configuration reduces thrust load, making it appropriate for both hand-held and machine-mounted drilling operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter R diameter (0.3390 inches) for precise clearance and tap-hole sizing\u003c\/li\u003e\n  \u003cli\u003e135-degree split point self-centers and reduces drill walking\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction with oxide finish for heat and wear resistance\u003c\/li\u003e\n  \u003cli\u003eWeldon flat shank with 3 flats prevents rotation in compatible holders\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web reduces drilling thrust load\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut spiral flute for efficient chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in drill presses, milling machines, and hand drills equipped with Weldon flat shank tool holders. Suitable for drilling carbon steel, cast iron, high alloy steel, stainless steel, high tensile strength alloy, and similar ferrous workpiece materials.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSecure the Weldon shank firmly in a compatible holder, ensuring all three flats are engaged by the set screws before operation. Always power down and lock out the machine before changing bits. Use appropriate cutting fluid when drilling stainless steel or high-alloy materials to extend tool life and manage heat buildup. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is degraded.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split Point\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: Weldon Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flats\u003c\/strong\u003e: 3\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\u003eDrill Length Type\u003c\/strong\u003e: Mechanics\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.625 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\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: -20870-R\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51689699213618,"sku":"-20870-R","price":24.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1c9afdee8212f08bc249fc44a584672a.jpg?v=1788263182","url":"https:\/\/voomisupply.com\/products\/value-collection-20870-r-letter-r-hss-mechanics-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}