Description
4 HP 2-Speed 230V Thru-Bolt Motor with Auto Overload Protector – 3600/1800 RPM, 48Y Frame
Engineered for pool and spa equipment, this rugged 4 HP two-speed motor delivers reliable power with adjustable performance. Running on 230V/60Hz, it provides 3600 RPM at high speed for quick circulation and 1800 RPM at low speed for energy-efficient operation and controlled starts. Built on a 48Y frame with 56Y thru-bolt mounting, it’s designed for straightforwardRetrofits and durable, vibration‑resistant installation.
- Dual-speed performance: 3600 RPM high-speed mode for fast throughput and 1800 RPM low-speed mode for gentle, consistent operation and torque when starting under load.
- Voltage and frequency: 230V at 60Hz, aligning with common pool and spa electrical systems for hassle-free integration.
- Frame and mounting: 48Y frame with 56Y thru-bolt mounting for secure installation in standard housings and retrofits.
- Threaded shaft: Easy pulleys and couplings installation with straightforward alignment and maintenance.
- Auto overload protector: Built‑in protection to prevent overheating during demanding duty cycles, helping extend motor life.
- Current draw: Full-load amps of 13.0 A at high speed and 3.3 A at low speed for precise electrical planning.
- Compact dimensions: Approximately 13.33 inches in size, offering a powerful yet space‑efficient solution for crowded equipment bays.
- Trusted brand: From A.O. Smith / Century Electrical, delivering durable pool and spa motors designed for challenging environments.
This dual‑speed motor reduces the need for external gearboxes or multiple drives, simplifying control wiring and retrofit projects. Ideal for pool circulation pumps, spa filtration and jet systems, and compact equipment where varying loads and quick speed adjustments are beneficial. The thru-bolt mounting and threaded shaft streamline installation and service, while the auto overload protection helps maintain reliable operation under peak demand. For a versatile, dependable drive in a compact 48Y frame, this motor delivers precise speed control and robust protection you can trust.
Meet the Motor 4 hp 2 speed 240v motor (56Y) Thru Bolt—a rugged, dual‑speed drive engineered to power demanding industrial equipment with reliability and precision. Featuring a 48Y frame and thru‑bolt mounting, this motor combines straightforward installation with robust performance, making retrofits and new builds simpler and more versatile.
- HP / Speeds: 4 HP with dual speeds of 3600 and 1800 RPM
- Voltage / Frequency: 230 V at 60 Hz
- Full Load Amps: 13.0 A at high speed / 3.3 A at low speed
- Frame / Mounting: 48Y frame, thru‑bolt mounting using 56Y configuration
- Shaft: Threaded for easy pulleys and couplings Overload Protection: Auto overload protector (C) for built‑in protection
- Service Factor: 1.0
- Dimensions: 13.33 (dim.)
Why this dual‑speed motor stands out
This motor isn’t just a single speed unit. The 3600/1800 RPM configuration lets you optimize performance for the task at hand—crisp throughput when speed matters, and maximum torque when starting under load or driving heavy conveyors, pumps, or compressors. The dual‑speed design reduces the need for external gearboxes or separate drive systems, saving space, reducing maintenance, and simplifying controls on retrofit projects.
Ideal use cases
- Conveyor drives and material handling where load conditions vary and quick speed changes are beneficial
- Industrial fans, blowers, and pumps that require a balance between high speed and high torque
- Woodworking and metalworking machinery where precise speed control improves finish quality and cycle times
- Process equipment and automation setups that benefit from a compact, easily mounted dual‑speed motor
Installation and compatibility tips
- Choose the 56Y thru‑bolt mounting for a secure, vibration‑resistant fit in standard frames.
- Utilize the threaded shaft for straightforward pulley or coupling installation—alignment becomes simpler and maintenance‑friendly.
- Auto overload protection helps prevent overheating and prolongs motor life in demanding duty cycles; ensure proper ventilation and clean cooling paths for best performance.
- Since it’s a 48Y frame, verify compatibility with existing equipment housings and flange patterns during retrofits.
Who should consider this motor
- Engineers and technicians retrofitting older machines that need flexible speed control without extra gearboxes
- Facilities upgrading to a more compact, multi‑purpose drive capable of handling varying loads
- Robust applications in packaging, conveying, processing, and automation where reliability and quick speed adjustments matter
With its 4 HP rating, dual RPM options, and thru‑bolt 56Y mounting, this motor delivers dependable power and adaptable performance for a wide range of industrial applications. It’s the practical choice when you need a single, versatile drive that can handle both high‑speed throughput and high‑torque starts—without compromising on installation simplicity or reliability.