{"product_id":"castair-replacement-motor-hub-1-1-8-shaft-lx118","title":"Castair Replacement Motor Hub, 1 1\/8\" Shaft LX118","description":"\u003cp\u003eThe Castair Replacement Motor Hub with 1-1\/8\" Shaft (LX118) is the correct motor hub for Cast Air compressor assemblies where the electric motor uses a 1-1\/8\" output shaft. Shaft diameter is the determining spec here — this hub is machined to fit a 1-1\/8\" shaft bore and won't interchange with other sizes in the LX series. If your motor shaft measures 1-1\/8\" (1.125\") with calipers, LX118 is your part.\u003c\/p\u003e\n\n\u003ch3\u003eWhat the Motor Hub Does\u003c\/h3\u003e\n\u003cp\u003eThe motor hub transfers rotational power from the electric motor's output shaft to the compressor pump's drive assembly — typically through a belt sheave or direct coupling arrangement. A worn, cracked, or loose hub causes misalignment between the motor and pump, leading to vibration, accelerated bearing wear, and belt problems. In worst cases, a failed hub can damage the motor shaft itself. Replacing the hub at the first sign of wear is considerably cheaper than a motor or pump rebuild.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1-1\/8\" Shaft Bore:\u003c\/strong\u003e Machined to fit motors with a 1.125\" diameter output shaft — measure before ordering\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCast Air OEM Part:\u003c\/strong\u003e Built to Cast Air's specifications for a correct, no-modification fit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Bore Tolerance:\u003c\/strong\u003e Maintains concentricity between motor shaft and pump drive for smooth, vibration-free operation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e Drops in to replace the original hub on compatible Cast Air units\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LX118\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft Diameter:\u003c\/strong\u003e 1-1\/8\" (1.125\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Replacement Motor Hub\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Cast Air\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $19.25\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Manufacturer's product page was unavailable at time of writing. Confirm compatibility with your Cast Air model number before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhen You Need This Part\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHub is visibly cracked, scored, or has developed play on the shaft\u003c\/li\u003e\n  \u003cli\u003eCompressor is vibrating or producing more noise than normal at startup\u003c\/li\u003e\n  \u003cli\u003eBelt tension is correct but the belt continues to slip or throw off\u003c\/li\u003e\n  \u003cli\u003eReplacing the electric motor and need a hub matched to the new motor's shaft diameter\u003c\/li\u003e\n  \u003cli\u003ePerforming scheduled maintenance on a high-hour Cast Air compressor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLX Series Hub Sizes — Order the Right One\u003c\/h3\u003e\n\u003cp\u003eCast Air's LX series motor hubs cover the shaft sizes used across their product line. Measure your motor shaft before ordering:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLX58\u003c\/strong\u003e — 5\/8\" shaft\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLX78\u003c\/strong\u003e — 7\/8\" shaft\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLX100\u003c\/strong\u003e — 1\" shaft\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLX118\u003c\/strong\u003e — 1-1\/8\" shaft (this part)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLX138\u003c\/strong\u003e — 1-3\/8\" shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From OEM Diagnostic Tools?\u003c\/h3\u003e\n\u003cp\u003eWe carry the complete Cast Air LX motor hub series so you can get the right part without hunting across multiple suppliers. We've been serving shops and industrial buyers since 2016 with genuine replacement parts. Free shipping on qualifying orders. If you need help confirming which hub fits your specific compressor, call us with the model number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342571331797,"sku":"LX118","price":35.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/CastairReplacementAirCompressorMotorHub_ac39a085-2799-43ef-b527-581504a6d759.png?v=1772652729","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-replacement-motor-hub-1-1-8-shaft-lx118","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}