{"product_id":"lovejoy-69790400069-rigid-coupling-hub-1-25in-bore-carbon-steel","title":"Lovejoy 69790400069 Rigid Coupling Hub 1.25in Bore Carbon Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe LOVEJOY 69790400069 is a rigid coupling hub designed for direct shaft-to-shaft power transmission in mechanical drive applications. It features a 1.25-inch bore and a 4.75-inch outside diameter, machined from carbon steel for durability under load. A 0.25-inch wide by 0.125-inch deep keyway is cut into the bore, allowing positive rotational engagement with a keyed shaft. Rigid coupling hubs like this one are installed by millwrights, mechanical contractors, and industrial maintenance technicians where precise shaft alignment is maintained and no flex or misalignment compensation is required.\u003c\/p\u003e\u003cp\u003eThis hub is suited for use in industrial and commercial mechanical drive systems, including pumps, fans, compressors, and conveyor drives. It is installed as one half of a rigid coupling assembly, mating with a corresponding hub and a center element or sleeve depending on the coupling system in use. Carbon steel construction makes it appropriate for general-purpose indoor or protected-environment drive train applications where corrosion exposure is limited.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1.25-inch bore diameter for direct shaft mounting\u003c\/li\u003e\n\u003cli\u003e4.75-inch outside diameter for coupling assembly fitment\u003c\/li\u003e\n\u003cli\u003e0.25-inch wide by 0.125-inch deep keyway for positive key engagement\u003c\/li\u003e\n\u003cli\u003eCarbon steel construction for strength and machinability\u003c\/li\u003e\n\u003cli\u003eRigid design maintains zero-backlash shaft alignment under torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or service hub for rigid coupling assemblies requiring a 1.25-inch bore with a 0.25-inch by 0.125-inch keyway and a 4.75-inch outside diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a millwright or mechanical technician. Ensure the drive shaft and mating coupling components are fully de-energized and locked out before mounting. Verify shaft and bore dimensions along with keyway fit before pressing or driving the hub onto the shaft. Rigid couplings require precise shaft alignment; check angular and parallel alignment to manufacturer tolerances before final tightening.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeyway Width\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeyway Depth\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Carbon Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.85 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: LOVEJOY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 69790400069\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LOVEJOY","offers":[{"title":"Default Title","offer_id":51540313080114,"sku":"69790400069","price":448.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f14646309ac3316979b61f7a36e1d3af_bd7c7ad7-86f2-4093-8243-7401f47163dd.jpg?v=1785851910","url":"https:\/\/voomisupply.com\/products\/lovejoy-69790400069-rigid-coupling-hub-1-25in-bore-carbon-steel","provider":"Voomi Supply","version":"1.0","type":"link"}