{"product_id":"hertel-72403074-taper-pin-reamer-no-7-hss-3-flute","title":"Hertel 72403074 Taper Pin Reamer No 7 Hss 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 72403074 is a No. 7 taper pin reamer ground from high-speed steel for hole enlarging, hole finishing, and hole shaping operations. It produces a standard 1:48 taper to accept No. 7 taper pins with a small end diameter of 0.3297 inches and a large end diameter of 0.4220 inches. The helical flute geometry with a left-hand spiral and right-hand cut improves chip evacuation and reduces chatter during the reaming pass. The bright, uncoated finish is suited for general-purpose use across ferrous and non-ferrous workpieces. Machinists and tool-and-die technicians use this reamer in manual and CNC drill press setups where precision taper pin fits are required.\u003c\/p\u003e\u003cp\u003eThis reamer fits production and maintenance reaming applications where a No. 7 standard taper pin must seat accurately in a drilled or pre-reamed hole. Typical scenarios include machine assembly, jig and fixture work, shaft-and-hub pin alignment, and repair operations where worn holes are brought back to a controlled taper fit. The straight shank accepts standard drill chucks and collet holders, making it accessible on most shop floor equipment without specialized toolholding. General-purpose tool performance makes it appropriate for job shops, maintenance departments, and production lines running moderate volumes.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eNo. 7 taper pin size with a 1:48 taper rate for standard pin fits\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across general-purpose materials\u003c\/li\u003e\n\u003cli\u003eHelical flute with left-hand spiral and right-hand cut for controlled chip flow\u003c\/li\u003e\n\u003cli\u003e3 flutes, 4.4375 inches flute length for consistent stock removal along the taper\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish — ready to use out of the box with appropriate cutting fluid\u003c\/li\u003e\n\u003cli\u003eStraight shank at 0.4063 inches diameter fits standard chucks and collet systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and general-purpose reamer for applications requiring a No. 7 standard taper pin fit in accordance with ASME taper pin standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis reamer is installed and operated by machinists or maintenance technicians using a drill press, milling machine, or hand-held power drill with a suitable chuck or collet. Secure the workpiece firmly before reaming and apply a compatible cutting fluid to extend tool life and improve surface finish. Always ream from a pre-drilled or pre-reamed pilot hole sized close to the small end diameter — never use the reamer to remove excessive stock in a single pass. Inspect the reamer for chipping or wear before each use, as a damaged cutting edge will produce an out-of-tolerance taper.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTaper Pin Size\u003c\/strong\u003e: No. 7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall End Diameter\u003c\/strong\u003e: 0.3297 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge End Diameter\u003c\/strong\u003e: 0.4220 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTaper Rate\u003c\/strong\u003e: 1:48\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 4.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.4063 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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: Bright\/Uncoated\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: 0.15 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: 72403074\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51753470755122,"sku":"72403074","price":139.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b8d7acbd268e40b595e713a998b9de14_d1055024-ecf8-4f15-b3cb-14d94d6a5d4c.jpg?v=1788937161","url":"https:\/\/voomisupply.com\/products\/hertel-72403074-taper-pin-reamer-no-7-hss-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}