{"product_id":"browning-1128305-finished-bore-sprocket-18-teeth","title":"Browning 1128305 Finished Bore Sprocket 18 Teeth","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BROWNING 1128305 is a finished bore roller chain sprocket designed for use with standard 40-series roller chain at a 1\/2 inch pitch. Machined from steel, this sprocket features 18 teeth, a 1 inch bore diameter, and a 3.14 inch outside diameter. The finished bore is ready for direct shaft installation without additional machining. It is a common component in mechanical drive systems across HVAC, conveyor, pump, and industrial equipment applications, typically installed by millwrights, maintenance technicians, or mechanical contractors working on power transmission assemblies.\u003c\/p\u003e\n\u003cp\u003eThis sprocket is suited for light-to-medium duty roller chain drive applications where a compact, fixed-bore steel sprocket is required. The 40-series chain trade size makes it compatible with widely available standard roller chain found in residential and commercial mechanical systems, including belt-and-chain drive arrangements on air handling units, pumps, and auxiliary equipment. The 2.391 inch hub diameter provides adequate material for set screw or keyway retention depending on shaft configuration.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFinished bore at 1 inch diameter — no additional machining required for direct shaft fit\u003c\/li\u003e\n  \u003cli\u003e18-tooth count with 1\/2 inch pitch for use with ANSI 40-series roller chain\u003c\/li\u003e\n  \u003cli\u003e3.14 inch outside diameter with 2.391 inch hub diameter\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in mechanical drive environments\u003c\/li\u003e\n  \u003cli\u003eCompact single-strand sprocket profile suitable for space-constrained drive assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard replacement finished bore sprocket for mechanical drive systems using ANSI 40-series roller chain with 1\/2 inch pitch and a 1 inch drive shaft diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified mechanical technicians or millwrights. Disengage and lock out all power to the drive system before removing or installing sprockets. Verify shaft diameter matches the 1 inch finished bore before installation, and ensure proper chain tension and sprocket alignment per the drive system manufacturer's guidelines to prevent premature chain and sprocket wear.\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: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChain Pitch\u003c\/strong\u003e: 1\/2 inch (0.5000 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChain Trade Size\u003c\/strong\u003e: 40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHub Diameter\u003c\/strong\u003e: 2.391 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 3.14 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: 1.05 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31171900\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: 1128305\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BROWNING","offers":[{"title":"Default Title","offer_id":51542792208690,"sku":"1128305","price":95.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/417eb0afd21576959f6270d270b308ea.jpg?v=1785907574","url":"https:\/\/voomisupply.com\/products\/browning-1128305-finished-bore-sprocket-18-teeth","provider":"Voomi Supply","version":"1.0","type":"link"}