{"product_id":"browning-1881051-finished-bore-sprocket-21t-5-8in-pitch","title":"Browning 1881051 Finished Bore Sprocket 21T 5\/8in Pitch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BROWNING 1881051 is a finished bore sprocket designed for use with ANSI No. 50 roller chain. It features 21 teeth and a 5\/8-inch chain pitch, with a fixed bore diameter of 1-3\/16 inches ready for direct shaft installation without additional machining. The sprocket is manufactured from steel for durability in moderate-to-heavy power transmission applications. With an outside diameter of 4.52 inches and a finished bore, this component is suited for mechanical power transmission systems found in industrial equipment, conveyor drives, and HVAC auxiliary machinery. Installation is handled by mechanical and industrial maintenance technicians.\u003c\/p\u003e\n\u003cp\u003eThis sprocket is intended for use in roller chain drive assemblies requiring ANSI No. 50 chain with a 0.625-inch pitch. Typical applications include conveyor systems, pump drives, compressor drives, and other mechanical power transmission setups where a 21-tooth finished bore sprocket is specified. The fixed bore diameter of 1-3\/16 inches limits shaft compatibility, so shaft size must be confirmed before installation. No secondary boring or broaching is required, making this a drop-in replacement in matching drive configurations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFinished bore at 1-3\/16 inches — no additional machining required for shaft fitment\u003c\/li\u003e\n  \u003cli\u003e21-tooth profile compatible with ANSI No. 50 roller chain at 5\/8-inch pitch\u003c\/li\u003e\n  \u003cli\u003eSteel construction for strength and wear resistance in power transmission service\u003c\/li\u003e\n  \u003cli\u003eOutside diameter of 4.52 inches suits standard sprocket drive envelopes\u003c\/li\u003e\n  \u003cli\u003eSingle-piece construction with fixed bore diameter — bore is both minimum and maximum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with ANSI No. 50 roller chain with a 5\/8-inch pitch. Shaft diameter must match the finished bore of 1-3\/16 inches exactly. Confirm chain trade size and bore requirements before ordering.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a qualified millwright or mechanical maintenance technician. Disengage and lock out all power to the drive system before removing or installing sprockets. Verify shaft diameter matches the 1-3\/16-inch finished bore before installation, and ensure proper chain alignment and tension per the drive system manufacturer guidelines after mounting. A setscrew or keyway arrangement is typically used to secure the sprocket to the shaft — confirm the bore configuration before installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSprocket Type\u003c\/strong\u003e: Finished Bore\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Teeth\u003c\/strong\u003e: 21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChain Pitch\u003c\/strong\u003e: 5\/8 inches (0.6250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChain Trade Size\u003c\/strong\u003e: 50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 1-3\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4.52 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.64 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: BROWNING\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1881051\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51541444788530,"sku":"1881051","price":138.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8969b1f50b79bfe1994358d31844f670_9974f840-68f2-49f7-80c8-95c731ac9d6d.jpg?v=1785876361","url":"https:\/\/voomisupply.com\/products\/browning-1881051-finished-bore-sprocket-21t-5-8in-pitch","provider":"Voomi Supply","version":"1.0","type":"link"}