{"product_id":"lovejoy-69790400080-rigid-coupling-hub-1-875in-bore","title":"Lovejoy 69790400080 Rigid Coupling Hub 1.875in Bore","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe LOVEJOY 69790400080 is a rigid coupling hub designed for shaft-to-shaft power transmission in mechanical drive systems. It features a 1.875-inch inside bore and a 4.75-inch outside diameter, with a 0.5-inch keyway width and 0.25-inch keyway depth for positive rotational locking. Constructed from carbon steel, this hub delivers the strength and dimensional stability required in demanding industrial and commercial mechanical applications. Licensed millwrights, maintenance mechanics, and industrial service technicians typically install this component as part of a complete rigid coupling assembly.\u003c\/p\u003e\n\u003cp\u003eThis rigid coupling hub is suited for use in pump drives, compressor assemblies, conveyor systems, and other rotating equipment where shaft misalignment must be held to a minimum. Rigid couplings transmit torque without flex, making precise shaft alignment a prerequisite during installation. The with-keyway configuration accommodates standard keyed shafts in the 1.875-inch bore range, providing a mechanical interlock that prevents relative rotation between the hub and the shaft under load.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1.875-inch inside bore fits standard keyed shafts in that diameter range\u003c\/li\u003e\n  \u003cli\u003e4.75-inch outside diameter suits medium-duty coupling assembly configurations\u003c\/li\u003e\n  \u003cli\u003e0.5-inch wide by 0.25-inch deep keyway provides positive shaft engagement\u003c\/li\u003e\n  \u003cli\u003eCarbon steel construction offers high tensile strength and wear resistance\u003c\/li\u003e\n  \u003cli\u003eRigid design transmits full torque without torsional flex or cushioning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service replacement rigid coupling hub for mechanical drive systems requiring a 1.875-inch bore keyed shaft interface. Verify outside diameter and keyway dimensions against the mating coupling half before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified millwright or mechanical technician. De-energize all drive equipment and lock out the power source before handling any shaft coupling components, following LOTO procedures per OSHA and facility standards. Shaft and bore surfaces should be clean and free of burrs before pressing or fitting the hub. Precise shaft alignment is critical with rigid couplings, as any angular or parallel misalignment will transmit directly to connected bearings and seals.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Bore Diameter\u003c\/strong\u003e: 1.875 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: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeyway Depth\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeyway Configuration\u003c\/strong\u003e: With Keyway\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: 3.5 pounds\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: LOVEJOY\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 69790400080\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LOVEJOY","offers":[{"title":"Default Title","offer_id":51542483173682,"sku":"69790400080","price":448.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/231b52580bade03660eb69a97887ea5b.jpg?v=1785901529","url":"https:\/\/voomisupply.com\/products\/lovejoy-69790400080-rigid-coupling-hub-1-875in-bore","provider":"Voomi Supply","version":"1.0","type":"link"}