GE K578 Ac Electric Motor Vac Phase Frame 1/2 208-230/460 56Z

( Brand: Ge ), ( Manufacturer Part Number: K578 ), ( Part Type: Ac Hp Motor Frame ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60 Hz ), ( Base Rpm: 1140 ), ( Shaft Type: Keyed ), ( Shaft Diameter: 5/8 In ), ( Insulation Class: B ), ( Current Type: Ac ), ( Service Factor: 1.00 ), ( Ac Phase: Three Phase ), ( Country Of Origin: United States )

Review GE 1/2 Hp Ac Electric Motor 208-230/460 Vac Phase 56z Frame

The **GE K578 1/2 Horsepower AC Electric Motor**, a robust and versatile component in the 56Z frame series, represents a reliable workhorse designed for a wide array of industrial, commercial, and light-duty applications. Engineered with precision by GE Motors a trusted name in power solutions this compact yet powerful motor delivers consistent performance across a broad range of voltage configurations, making it an ideal choice for systems operating on **208-230V AC single-phase** or **460V AC three-phase** power supplies. Its ** horsepower (0.5 hp)** output ensures efficient operation for tasks requiring moderate torque and speed, such as conveyor systems, small pumps, compressors, fans, and automated machinery, where reliability and durability are paramount.

Built to withstand demanding environments, the K578 motor features a **drip-proof (DP) or totally enclosed fan-cooled (TEFC) design**, depending on the specific application requirements, ensuring optimal protection against dust, debris, and moisture while maintaining efficient heat dissipation. The **56Z frame** provides a standardized mounting interface, compatible with a variety of gearboxes, pulleys, and mechanical couplings, simplifying integration into existing or new systems. With a **synchronous speed of 3450 RPM** (when powered by 60Hz), this motor offers a balanced combination of speed and torque, making it suitable for applications where precision and consistency are critical.

Constructed from high-quality materials, the K578 motor incorporates a **cast iron end shields and rotor**, providing structural integrity and resistance to wear over extended periods of use. The **ball-bearing support system** ensures smooth operation with minimal friction, reducing maintenance needs and extending the motor s operational lifespan. Additionally, its **NEMA Premium efficiency rating** a hallmark of GE s commitment to energy conservation helps minimize operational costs by reducing energy consumption without compromising performance. Whether deployed in manufacturing plants, HVAC systems, agricultural equipment, or commercial facilities, this motor exemplifies GE s dedication to delivering dependable, high-performance electric power solutions that meet the evolving demands of modern industry.

For applications requiring flexibility, the K578 s **universal voltage compatibility** (208-230V single-phase or 460V three-phase) allows for seamless integration into diverse electrical infrastructures, while its **standardized NEMA dimensions** ensure compatibility with a wide range of industry-specific components. Whether used in a small workshop, a mid-sized production line, or a commercial ventilation system, this motor combines efficiency, durability, and ease of installation to deliver reliable power where it s needed most. With minimal maintenance requirements and a reputation for longevity, the GE K578 HP AC motor stands as a dependable choice for engineers, technicians, and operators seeking a balance of performance and practicality in their mechanical systems.

### **Pros and Cons of buying a GE K578 1/2 HP AC Electric Motor (208-230/460V, 3-Phase, 56 Frame)**

1. **Reliable Brand Reputation** GE is a well-established manufacturer with a long history of producing durable industrial motors. Their motors are often used in commercial and industrial applications, which suggests a level of reliability and quality.

2. **Wide Voltage Range (208-230/460V)** The motor s ability to operate across multiple voltage levels (single-phase 208-230V and three-phase 460V) makes it versatile for different electrical setups without requiring significant modifications.

3. **Standard 56 Frame Size** The 56 frame is a common industrial motor size, meaning replacement parts, bearings, and accessories are widely available. This reduces downtime and repair costs in the long run.

4. **1/2 Horsepower Capacity** Suitable for light to moderate-duty applications such as small pumps, fans, conveyors, or small machinery. It provides enough power for many common tasks without being overly large or expensive.

5. **Three-Phase Capability** While it can run on single-phase (208-230V), its three-phase (460V) compatibility offers better efficiency and torque for industrial applications where three-phase power is available.

6. **Potential for Long Lifespan** If properly maintained, GE motors are known for lasting decades, especially in applications with moderate wear and tear.

7. **Compatibility with Existing Systems** If your facility already uses GE motors or similar brands, this motor may integrate seamlessly with existing wiring, controls, and maintenance protocols.

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- Limited availability of new units (may require sourcing from used markets or distributors).

- Potential obsolescence in terms of newer efficiency standards or smart motor technologies.

- Difficulty finding updated documentation or technical support compared to newer models.

2. **Energy Efficiency Concerns** Older motors (including some from the K578 series) may not meet modern energy efficiency standards (e.g., NEMA Premium or IE3/IE4 ratings). This could lead to higher operating costs over time.

3. **Single-Phase Limitations** While it can run on single-phase, three-phase motors are generally more efficient and powerful for industrial use. If your application requires three-phase, this motor is fine, but if you re stuck with single-phase, performance may be suboptimal.

4. **Maintenance Requirements** Like all motors, this one will require periodic maintenance (lubrication, bearing checks, cooling system upkeep). Poor maintenance can reduce lifespan and efficiency.

5. **Potential for Higher Upfront Cost** If purchasing new, the price may be higher than comparable motors from newer series or other brands. If buying used, there s a risk of hidden issues (e.g., worn bearings, electrical faults).

6. **Limited Smart Features** Modern motors often include features like variable frequency drives (VFDs), energy monitoring, or predictive maintenance capabilities. This motor likely lacks such advanced functionalities.

7. **Warranty and Support Risks** If the motor is older or discontinued, GE may not offer standard warranties or easy access to customer support for repairs.

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The **GE K578 1/2 HP AC motor** is a **practical choice for light-duty, industrial, or commercial applications** where reliability, standard sizing, and voltage flexibility are priorities. It is well-suited for applications like small pumps, fans, or conveyors where efficiency isn t the top concern, and maintenance can be managed. However, if **energy efficiency, modern features, or long-term availability** are critical, newer models (e.g., GE s current series or NEMA Premium-rated motors) may be better investments.

For **budget-conscious buyers or those with existing GE infrastructure**, this motor remains a solid option, especially if sourced from a reputable dealer. For **new installations or high-efficiency needs**, exploring newer or more energy-efficient alternatives (e.g., 208V/230V single-phase motors with IE3 ratings or three-phase motors with VFD compatibility) could be more cost-effective in the long run.

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- You need a **reliable, standard-sized motor** for a **light-duty application** (e.g., small machinery, fans, or pumps).

- Your facility already uses **GE motors**, and compatibility is a priority.

- You can **source it from a trusted supplier** (new or lightly used) and are willing to maintain it properly.

- Energy efficiency isn t a major concern, and the motor will operate in **moderate conditions**.

- You require **high efficiency** (look for **NEMA Premium or IE3/IE4-rated motors**).

- You need **smart features** (VFDs, remote monitoring) or **modern warranties**.

- The motor is **discontinued**, and you re unsure about long-term availability.

- Your application demands **higher horsepower or continuous duty cycles** (this is a 1/2 HP motor, which may struggle under heavy loads).

- **Newer GE Motors:** Check GE s current line for updated models with better efficiency.

- **NEMA Premium Motors:** More energy-efficient and often eligible for rebates.

- **Brand Alternatives:** Motors from **Weg, ABB, or Siemens** may offer similar reliability with modern features.

- **Used vs. New:** If buying used, inspect thoroughly for wear; consider a **motor test or rebuild** if purchasing from a secondary market.

Ultimately, weigh the **cost, efficiency needs, and long-term maintenance** against the motor s pros and cons before deciding. If possible, consult an **electrician or motor specialist** to ensure it meets your specific application requirements.

Details:

Shaft Diameter: 5/8 Keyed. GE 1/2 HP AC Electric Motor 208-230/460 VAC. Catalog # K578. Shaft length : 5-7/8.

Items with free shipping are not to return unless there was an error on our part or a defect in the item.

part #: k578 prices

• $134.99-$200.00

specifications oelemot:

• brand: Ge
• mpn: K578
• part type: Ac Hp Motor Frame
• rated load: Hp
• ac frequency rating: 60 Hz
• base rpm: 1140
• shaft type: Keyed
• shaft diameter: 5/8 In
• insulation class: B
• current type: Ac
• service factor: 1.00
• ac phase: Three Phase
• country of origin: United States

returns oelemot:

• paid by: Buyer
• method: Money back
• time: 30 Days
• policy: Returns Accepted

General oelemot:

• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors
• condition: Used

offer oelemot:

• quantity: 1
• best offers: True
• started: April 20, 2026
• options: Ship-to-home
• availability: In Stock
• sold: 0

payments oelemot:

• credit card: Visa
• other
• wallet: Paypal

seller oelemot:

• # reviews: 68462
• rating: 99.9%
• city: Camden, New Jersey

shipping oelemot:

• class: Standard, Expedited, One-day
• transit: 3-7 Days
• type: Calculated
• service: UPS Ground, USPS Priority Mail, UPS Next Day Air Saver
• carrier: UPS, USPS
• cost: $31.00

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