{"product_id":"a-o-smith-century-4-0-hp-motor-56-frame-single-phase-square-flange-through-bolt-230v-b237","title":"A.O. Smith Century 4.0 HP Motor 56 Frame Single Phase Square Flange Through Bolt 230V B237","description":"\u003cdiv\u003e\n\u003ch1\u003eA.O. Smith Century 4.0 HP Motor 230V B237\u003c\/h1\u003e\n\u003cp\u003eThe A.O. Smith Century B237 is a robust 4.0 HP pool and spa motor designed for dependable OEM replacement across residential, commercial, and industrial equipment. With a 56-frame size and square flange through-bolt mounting, it offers straightforward installation and reliable performance in HVAC, pool pumps, and spa systems.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHP \u0026amp; Frame\u003c\/b\u003e: 4.0 HP on a standard 56-frame platform, delivering solid torque for typical pool pumps, spa circulation, and related machinery. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVoltage\u003c\/b\u003e: 230V operation, aligning with common regional power standards and equipment specs. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e mounting\u003c\/b\u003e: Square flange with thru-bolts (SqFl\/Thru Bolt) for secure installation and precise alignment with compatible housings. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSpeed\u003c\/b\u003e: 1-Single-speed design for simple, consistent performance without additional controls. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOEM-Ready Replacement\u003c\/b\u003e: Built as a drop-in replacement or retrofit for Century\/A.O. Smith pool, spa, and HVAC applications, helping minimize downtime. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBrand \u0026amp; Support\u003c\/b\u003e: Part of the Regal Beloit family, backed by a global distribution and parts network for installation, troubleshooting, and uptime assurance. \u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned to replace aging motors in a wide range of systems, the B237 combines a proven 56-frame platform with dependable 230V operation to support pool pumps, spa equipment, and light industrial cooling gear. The SqFl\/Thru Bolt mounting pattern provides secure, repeatable alignment, making it a practical choice for OEM replacements and retrofits. With a global support network backing the Century\/A.O. Smith line, sourcing parts and service is straightforward to help maintain uptime. \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003eMeet the A.O. Smith Century 4.0 HP Motor, model B237 — a robust 56-frame, single-speed motor designed for dependable performance across HVAC, pool and spa equipment, and a range of commercial and industrial applications. With a 230V supply and a square flange \/ thru-bolt (SqFl\/Thru Bolt) mounting, this motor is engineered for straightforward installation and reliable OEM-compatible replacement.\u003c\/p\u003e \u003cp\u003eRooted in a legacy of more than 75 years of engineering excellence, A.O. Smith and Century Electric Motors deliver durable motors that serve residential, commercial, and industrial systems. Now supported by Regal Beloit America’s global footprint, this motor combines proven design with a modern supply chain, ensuring you have a dependable replacement when uptime matters most.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHorsepower and frame:\u003c\/strong\u003e 4.0 HP in a standard 56-frame configuration for broad compatibility with many legacy and modern assemblies.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeed:\u003c\/strong\u003e 1-S single-speed operation — simple, consistent performance without the complexity of additional controls.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting and fit:\u003c\/strong\u003e SqFl\/Thru Bolt mounting for secure, easy installation and reliable alignment with compatible housings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eElectrical requirements:\u003c\/strong\u003e 230V operation, aligning with common regional power standards and typical equipment specs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready replacement:\u003c\/strong\u003e Built to be a drop-in replacement or easy retrofitting option for HVAC systems, pool\/pump setups, and other machinery that rely on Century\/A.O. Smith reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProven support network:\u003c\/strong\u003e Part of a global family of electric motors backed by Regal Beloit, with OEM and aftermarket distribution ready to help you source parts, troubleshoot, and maintain uptime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis motor is ideal for replacing aging motors in a wide range of systems, from residential comfort and pool equipment to commercial cooling and industrial machines that depend on steady torque and durable construction. Its legacy-driven reliability means you’re not just buying a motor—you’re investing in a serviceable, long-lasting component that aligns with your equipment’s original design intent.\u003c\/p\u003e \u003cp\u003eWhy choose this A.O. Smith Century motor? Because it combines a storied engineering lineage with practical, real-world benefits: straightforward installation, solid torque at 4.0 HP, a frame and mounting combination that fits many existing installations, and the assurance of ongoing support from a global motor leader. For technicians and facility managers seeking a dependable replacement that minimizes downtime and preserves system performance, the B237 4.0 HP 56-frame motor is a compelling choice.\u003c\/p\u003e \u003cbr\u003e \u003ctable border=\"0\" cellpadding=\"5\" cellspacing=\"5\"\u003e\n\u003ctr\u003e\n\u003ctd width=\"60%\"\u003e\n\u003cspan class=\"bspotext12h\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eWHY USE A.O. SMITH (AOS)\/CENTURY PRODUCTS?\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e \u003c\/td\u003e\n\u003ctd width=\"15%\"\u003e \u003cbr\u003e\n\u003c\/td\u003e \u003ctd width=\"25%\" valign=\"top\"\u003e \u003c\/td\u003e \u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cspan class=\"bspotext8n\"\u003e Regal Beloit America, Inc. (Century Electric Motors \/ A.O. Smith Electric Motors) is a leading supplier of electric motors for residential, commercial, and industrial applications. With operations in the United States, Mexico, China, and Europe, Regal Beloit America, Inc. has the ability to serve its customers electric motor needs on a global basis. We offer a comprehensive line of hermetic motors (used in air conditioning compressors), fractional horsepower A\/C and D\/C motors, and integral horsepower motors. We sell our products directly to original equipment manufacturers (OEMs), and replacement motors to HVAC and pool\/pump distributors.\u003cbr\u003e\n\u003cbr\u003e\nBath \u0026amp; Spa Parts Online is proud to say that we have carried and sold Century\/A.O. Smith (AOS) replacement motors since we started in the Bath \u0026amp; Spa industry in the early 1980's. At this time, the company was introducing their Centurion switchless, permanent split capacitor motors for the swimming pool, spa, and jetted tub industries. A.O. Smith (AOS)\/Century has been committed to providing quality products for more than 75 years, and that commitment continues today. If you have any questions about their product line, please feel free to ask us. We carry the complete line of their products!\u003cbr\u003e\n\u003cbr\u003e\u003cbr\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e \u003cbr\u003e \u003ctable border=\"0\" cellpadding=\"5\" cellspacing=\"5\"\u003e\n\u003ctr\u003e\n\u003ctd width=\"60%\"\u003e\n\u003cspan class=\"bspotext12h\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eWHY USE A.O. SMITH (AOS)\/CENTURY PRODUCTS?\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e \u003c\/td\u003e\n\u003ctd width=\"15%\"\u003e \u003cbr\u003e\n\u003c\/td\u003e \u003ctd width=\"25%\" valign=\"top\"\u003e \u003c\/td\u003e \u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cspan class=\"bspotext8n\"\u003e Regal Beloit America, Inc. (Century Electric Motors \/ A.O. Smith Electric Motors) is a leading supplier of electric motors for residential, commercial, and industrial applications. With operations in the United States, Mexico, China, and Europe, Regal Beloit America, Inc. has the ability to serve its customers electric motor needs on a global basis. We offer a comprehensive line of hermetic motors (used in air conditioning compressors), fractional horsepower A\/C and D\/C motors, and integral horsepower motors. We sell our products directly to original equipment manufacturers (OEMs), and replacement motors to HVAC and pool\/pump distributors.\u003cbr\u003e\n\u003cbr\u003e\nBath \u0026amp; Spa Parts Online is proud to say that we have carried and sold Century\/A.O. Smith (AOS) replacement motors since we started in the Bath \u0026amp; Spa industry in the early 1980's. At this time, the company was introducing their Centurion switchless, permanent split capacitor motors for the swimming pool, spa, and jetted tub industries. A.O. Smith (AOS)\/Century has been committed to providing quality products for more than 75 years, and that commitment continues today. If you have any questions about their product line, please feel free to ask us. We carry the complete line of their products!\u003cbr\u003e\n\u003cbr\u003e\u003cbr\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"A.O. Smith (AOS) \/ Century Electrical","offers":[{"title":"Default Title","offer_id":40241190207530,"sku":"B237","price":434.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/4014\/1354\/products\/35-126-1160_xl.jpg?v=1769976035","url":"https:\/\/bathparts.com\/products\/a-o-smith-century-4-0-hp-motor-56-frame-single-phase-square-flange-through-bolt-230v-b237","provider":"Bath \u0026 Spa Superstore","version":"1.0","type":"link"}