{"product_id":"value-collection-557u-8-taper-pin-reamer-size-8-hss","title":"Value Collection 557U 8 Taper Pin Reamer Size 8 Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 557U 8 is a size 8 taper pin reamer designed for hole enlarging, hole finishing, and hole shaping operations in metal fabrication and mechanical assembly work. Built from high-speed steel with a bright, uncoated finish, this reamer features a spiral flute geometry with left-hand spiral direction and right-hand cutting action. The small end diameter measures 0.3971 inches and the large end measures 0.5050 inches, following a 1:48 taper rate. With a 7\/16-inch square shank, this tool seats securely in standard tap wrenches and reamer holders. Machinists and tool-and-die professionals reach for this style of reamer when fitting taper pins in hubs, shafts, and mechanical joints.\u003c\/p\u003e\u003cp\u003eThis taper pin reamer is suited for general-purpose use in job shop, maintenance, and production environments. Typical applications include enlarging and finishing tapered holes to accept standard size 8 taper pins in mechanical assemblies such as shaft collars, couplings, and linkage components. The 1:48 taper rate conforms to standard taper pin geometry, making this reamer appropriate wherever a properly fitted, removable taper pin connection is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHigh-speed steel construction for general-purpose reaming in a range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eSize 8 taper pin geometry with 1:48 taper rate and 0.3971-inch small end to 0.5050-inch large end\u003c\/li\u003e\n\u003cli\u003eSpiral flute design with left-hand spiral and right-hand cut for smooth chip evacuation\u003c\/li\u003e\n\u003cli\u003e7\/16-inch square shank for positive drive in standard tap wrenches and holders\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for use with cutting fluid in standard shop conditions\u003c\/li\u003e\n\u003cli\u003e5.1875-inch flute length provides ample cutting surface for through-hole and deep-hole applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard tooling option for size 8 taper pin reaming applications conforming to the 1:48 standard taper pin specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis reamer is installed and operated by machinists and tool-and-die technicians using a standard tap wrench or reamer holder matched to the 7\/16-inch square shank. Secure the workpiece before reaming and apply appropriate cutting fluid to extend tool life and improve finish quality. Feed the reamer steadily with consistent hand pressure; do not force or reverse the cutter under load. Always wear appropriate eye protection and follow shop safety procedures when operating hand reamers.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTaper Pin Size\u003c\/strong\u003e: 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall End Diameter\u003c\/strong\u003e: 0.3971 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge End Diameter\u003c\/strong\u003e: 0.5050 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: 7.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 5.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.4375 inches (7\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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 Application\u003c\/strong\u003e: Hole Enlarging, Hole Finishing, Hole Shaping\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: 0.05 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: VALUE COLLECTION\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 557U 8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51698057609522,"sku":"557U 8","price":213.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/42f917f59edf09af0cb401c77d7c5b66.jpg?v=1788357229","url":"https:\/\/voomisupply.com\/products\/value-collection-557u-8-taper-pin-reamer-size-8-hss","provider":"Voomi Supply","version":"1.0","type":"link"}