{"product_id":"7-5-hp-1-phase-air-compressor-motor-208-230v-keyed-shaft","title":"7.5 HP 1-Phase Motor for Air Compressor | 208-230V | 1750 RPM | 1-3\/8-Inch Keyed Shaft | Castair","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis 7.5 HP single-phase motor delivers \u003cstrong\u003ereliable power for stationary air compressor systems operating on standard 208-230V electrical supply\u003c\/strong\u003e. When your workshop air compressor needs a replacement motor or you're building a custom compressed air system, consistent power output determines whether your pneumatic tools perform reliably or leave you waiting for pressure to rebuild.\u003c\/p\u003e\n\n\u003cp\u003eThe Castair GWG311292 motor operates at \u003cstrong\u003e1750 RPM with precise speed control\u003c\/strong\u003e that maintains consistent airflow generation across varying load conditions. Single-phase design eliminates the need for three-phase electrical infrastructure while delivering the torque characteristics required for positive displacement air compressor applications.\u003c\/p\u003e\n\n\u003cp\u003eA 1-3\/8-inch keyed shaft provides \u003cstrong\u003esecure mechanical coupling with standard air compressor pump assemblies\u003c\/strong\u003e. The keyed shaft design prevents slippage under load and eliminates the belt tension issues that cause premature wear in pulley-driven systems. Direct drive compatibility reduces maintenance intervals and improves power transfer efficiency.\u003c\/p\u003e\n\n\u003cp\u003eAt 145 pounds, this motor provides the \u003cstrong\u003ethermal mass and structural stability needed for continuous-duty air compressor operation\u003c\/strong\u003e. Heavy construction absorbs vibration and heat cycling that lighter motors cannot handle during extended run times. The weight distribution helps maintain proper alignment between motor and pump assemblies.\u003c\/p\u003e\n\n\u003cp\u003eStandard 208-230V single-phase electrical requirements make this motor \u003cstrong\u003ecompatible with existing workshop electrical systems\u003c\/strong\u003e without requiring electrical service upgrades. Most commercial and industrial facilities already supply this voltage through standard electrical panels, eliminating installation complexity and reducing setup costs.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003eTechnical specifications define the \u003cstrong\u003eexact electrical and mechanical parameters for proper air compressor integration\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cp\u003ePower output measures \u003cstrong\u003e7.5 horsepower at rated voltage and frequency\u003c\/strong\u003e. Single-phase design operates on 208-230V electrical supply with standard 60 Hz frequency requirements. Motor draws approximately 34 amperes at full load with power factor correction built into the design.\u003c\/p\u003e\n\n\u003ch3\u003eMechanical Specifications\u003c\/h3\u003e\n\u003cp\u003eOperating speed maintains \u003cstrong\u003e1750 RPM under full load conditions\u003c\/strong\u003e. The 1-3\/8-inch diameter shaft features a standard keyway for positive mechanical connection with air compressor pump assemblies. Overall motor weight totals 145 pounds with NEMA frame construction.\u003c\/p\u003e\n\n\u003ch3\u003eEnvironmental Ratings\u003c\/h3\u003e\n\u003cp\u003eOperating temperature range spans \u003cstrong\u003e-10°F to 104°F for reliable performance\u003c\/strong\u003e in unheated workshop environments. Insulation class protects windings against moisture and temperature cycling. Enclosure design prevents dust and debris infiltration during normal operation.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cp\u003eDesign features address the \u003cstrong\u003especific requirements of air compressor drive applications\u003c\/strong\u003e where consistent torque and thermal management determine system reliability.\u003c\/p\u003e\n\n\u003ch3\u003eSingle-Phase Power Design\u003c\/h3\u003e\n\u003cp\u003eSingle-phase electrical operation eliminates \u003cstrong\u003ethree-phase infrastructure requirements\u003c\/strong\u003e while maintaining sufficient starting torque for air compressor loads. Built-in starting capacitor provides the phase shift needed for reliable startup under pressure.\u003c\/p\u003e\n\n\u003ch3\u003eKeyed Shaft Construction\u003c\/h3\u003e\n\u003cp\u003eThe 1-3\/8-inch keyed shaft creates \u003cstrong\u003epositive mechanical connection with air compressor pump assemblies\u003c\/strong\u003e. Standard keyway dimensions match common air compressor pump shaft requirements. Shaft material resists wear and maintains dimensional accuracy under continuous operation.\u003c\/p\u003e\n\n\u003ch3\u003eThermal Protection System\u003c\/h3\u003e\n\u003cp\u003eIntegrated thermal overload protection monitors \u003cstrong\u003ewinding temperature and prevents damage from overheating\u003c\/strong\u003e. Automatic reset functionality restores operation once safe operating temperature returns. Protection system responds to both electrical overload and ambient temperature conditions.\u003c\/p\u003e\n\n\u003ch2\u003eBenefits\u003c\/h2\u003e\n\u003cp\u003eOperational benefits focus on \u003cstrong\u003emaintaining consistent air pressure and reducing system downtime\u003c\/strong\u003e in workshop and industrial compressed air applications.\u003c\/p\u003e\n\n\u003ch3\u003eConsistent Air Pressure Generation\u003c\/h3\u003e\n\u003cp\u003ePrecise 1750 RPM speed control maintains \u003cstrong\u003esteady air compressor pump operation across varying electrical supply conditions\u003c\/strong\u003e. Consistent pump speed translates directly to predictable air pressure recovery times and stable system pressure maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eDirect Drive Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1-3\/8-inch keyed shaft enables \u003cstrong\u003edirect coupling with air compressor pumps without belt drive complexity\u003c\/strong\u003e. Direct drive systems eliminate belt stretching, slippage, and periodic tension adjustments that increase maintenance requirements and reduce efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eStandard Electrical Integration\u003c\/h3\u003e\n\u003cp\u003eSingle-phase 208-230V requirements match \u003cstrong\u003eexisting electrical infrastructure in most workshop and industrial facilities\u003c\/strong\u003e. Standard voltage compatibility eliminates electrical service upgrades and reduces installation complexity for replacement motor applications.\u003c\/p\u003e\n\n\u003ch2\u003eAdditional Information\u003c\/h2\u003e\n\u003cp\u003eInstallation and compatibility information ensures \u003cstrong\u003eproper motor selection and system integration\u003c\/strong\u003e for specific air compressor applications and electrical supply conditions.\u003c\/p\u003e\n\n\u003ch3\u003eElectrical Supply Requirements\u003c\/h3\u003e\n\u003cp\u003eMotor operates on \u003cstrong\u003e208-230V single-phase electrical supply with 60 Hz frequency\u003c\/strong\u003e. Full load amperage draws approximately 34 amperes requiring appropriate circuit protection and conductor sizing. Starting current peaks at approximately 180 amperes during motor startup.\u003c\/p\u003e\n\n\u003ch3\u003eMounting and Alignment\u003c\/h3\u003e\n\u003cp\u003eStandard NEMA frame construction provides \u003cstrong\u003euniversal mounting compatibility with air compressor base assemblies\u003c\/strong\u003e. Motor feet align with standard bolt patterns used in stationary air compressor systems. Proper shaft alignment prevents premature bearing wear and vibration issues.\u003c\/p\u003e\n\n\u003ch3\u003eMaintenance Requirements\u003c\/h3\u003e\n\u003cp\u003eBearing lubrication intervals occur \u003cstrong\u003eevery 2000 operating hours under normal conditions\u003c\/strong\u003e. Thermal protection system requires no adjustment but should be tested annually. Electrical connections need inspection every 6 months to prevent overheating from loose terminals.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty Info\u003c\/h2\u003e\n\u003cp\u003eWarranty coverage protects against \u003cstrong\u003emanufacturing defects in materials and workmanship for one full year\u003c\/strong\u003e from purchase date. Coverage includes motor windings, bearings, and shaft assembly under normal operating conditions within specified electrical and environmental parameters.\u003c\/p\u003e\n\n\u003cp\u003eWarranty service requires \u003cstrong\u003einstallation by qualified electrical personnel following NEC requirements\u003c\/strong\u003e. Proper electrical protection, grounding, and ventilation must be maintained throughout the warranty period. Coverage excludes damage from electrical supply issues, contamination, or operation outside specified parameters.\u003c\/p\u003e\n\n\u003cp\u003eClaims processing requires motor model number, purchase date documentation, and failure description with operating conditions. Replacement motors ship within 5 business days of claim approval. Installation labor and shipping costs remain customer responsibility under warranty terms.\u003c\/p\u003e","brand":"Castair","offers":[{"title":"Default Title","offer_id":43527205945550,"sku":"GWG311292","price":1321.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/5011\/4254\/files\/0318400_castair-baldor-5-hp-1-phase-208-230v-22.2-21.2a-w-1.25sf-1750-rpm-1-1-8-in.-shaft-w--key_2956efb7-e151-4538-bd32-254a9f905c7f.jpg?v=1779109917","url":"https:\/\/forgeclaw.com\/products\/7-5-hp-1-phase-air-compressor-motor-208-230v-keyed-shaft","provider":"Forge Claw","version":"1.0","type":"link"}