DAYTON 5K911C Split Phase Motor Rpm Shaft 1/4 1725 1/2 115V

( Brand: Dayton ), ( Manufacturer Part Number: 5K911C ), ( Part Type: Hp Motor Shaft ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60 Hz ), ( Special Motor Construction: Split-phase ), ( Base Rpm: 1725 ), ( Shaft Type: D Profile ), ( Shaft Diameter: 1/2 In ), ( Mounting Type: Base-mounted, Foot-mounted ), ( Reversible/non-reversible: Reversible ), ( Current Type: Ac ), ( Nominal Rated Input Voltage: 115 V ), ( Ac Phase: Single Phase ), ( Country Of Origin: United States )

Review DAYTON Split Phase Motor 1/4 Hp Rpm 1/2 Inch Shaft 115v

The **Dayton 5K911C Split-Phase Induction Motor** is a robust, high-performance electric motor engineered for reliability, efficiency, and versatility in a wide range of industrial, commercial, and residential applications. Part of Dayton s trusted line of fractional horsepower motors, this **1/4 horsepower (0.25 hp)** unit delivers a consistent and dependable power output while maintaining a compact yet durable design. With a **1725 RPM** synchronous speed, it strikes an ideal balance between torque and speed, making it well-suited for applications requiring moderate rotational force without excessive wear or overheating. The motor operates at a standard **115V single-phase voltage**, ensuring compatibility with most household and light-duty commercial electrical systems, while its **split-phase induction design** provides smooth starting performance without the need for additional capacitors or complex control mechanisms.

Built to withstand the demands of continuous operation, the **5K911C** features a ** -inch shaft diameter**, offering sufficient mechanical strength for driving belts, pulleys, or direct-coupled equipment while minimizing vibration and backlash. Its **split-phase winding configuration** ensures efficient starting torque, allowing it to overcome inertia and load resistance with ease, which is particularly advantageous in applications like fans, blowers, pumps, and small machinery where quick and reliable engagement is critical. The motor s **NEMA Premium Efficiency** standards contribute to reduced energy consumption, lower operational costs, and extended component lifespan, making it an economically sound choice for both new installations and retrofits.

Constructed with **high-quality materials**, the Dayton 5K911C is designed for durability, featuring a **cast aluminum or die-cast housing** that resists corrosion and mechanical stress while maintaining a lightweight profile. The motor s **ball-bearing support system** ensures smooth operation and prolonged bearing life, even under fluctuating loads, while its **overmolded terminal box** provides a secure and weather-resistant connection for wiring. With a **Class B insulation rating**, the motor operates reliably within a temperature range of -20 F to 180 F (-29 C to 82 C), making it suitable for a variety of environmental conditions, from indoor applications to lightly protected outdoor setups. Whether integrated into HVAC systems, small workshop machinery, or automated equipment, the **Dayton 5K911C** delivers consistent performance, quiet operation, and long-term reliability proving to be a dependable workhorse for countless industrial and commercial tasks.

### **Pros and Cons of buying a Dayton 5K911C Split-Phase Motor (1/4 HP, 1725 RPM, 1/2 Shaft, 115V)**

1. **Reliability and Durability** Dayton is a well-known brand in the motor industry, known for producing high-quality, long-lasting motors. The split-phase design is a proven, robust technology for single-phase applications.

2. **Standard Specifications** The 1/4 HP rating is common for small appliances, fans, and tools, making it easy to find compatible applications. The 1725 RPM speed is suitable for many light-duty tasks without requiring additional gearing.

3. **115V Compatibility** Works seamlessly with standard household electrical systems in North America, eliminating the need for voltage converters or special wiring.

4. **Split-Phase Starting** This motor type uses a centrifugal switch to provide starting torque, which is ideal for applications where the load may require extra initial power (e.g., small fans, pumps, or compressors).

5. **Fractional Horsepower Efficiency** At 1/4 HP, it consumes minimal power while delivering adequate performance for low-to-medium-duty tasks, making it cost-effective to operate.

6. **Easy Installation** The 1/2 shaft size is standard for many small appliances, and the motor is designed for straightforward mounting with minimal modifications.

7. **Wide Availability** As a common motor model, replacement parts and technical support are readily accessible.

8. **Low Maintenance** Split-phase motors typically require little upkeep, with the main concerns being bearing lubrication and ensuring proper ventilation.

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1. **Limited Power for Heavy Loads** At only 1/4 HP, this motor is not suitable for high-torque or continuous heavy-duty applications. It may struggle with prolonged use under significant resistance.

2. **No Variable Speed Control** Unlike some modern motors (e.g., EC or brushless DC), this is a fixed-speed motor. If adjustable speed is required, additional components (e.g., a VFD) would be needed, adding cost and complexity.

3. **Sensitivity to Voltage Fluctuations** Split-phase motors can be sensitive to voltage spikes or drops, which may affect performance or lifespan if the power supply is unstable.

4. **No Built-in Overload Protection** Unlike some motors with thermal protection, this model relies on external safeguards (e.g., fuses or circuit breakers) to prevent damage from overloads.

5. **Bearing Wear Over Time** Like all motors, bearings degrade with use. While this is common to all fractional HP motors, it may require eventual replacement, especially in dusty or humid environments.

6. **Limited Environmental Resistance** Unless specified otherwise, this motor may not be rated for extreme conditions (e.g., high humidity, corrosive environments, or temperature extremes). Check the model s NEMA rating if operating in harsh settings.

7. **No Brushes (Generally)** Since it s a split-phase induction motor, it lacks brushes (unlike universal motors), which reduces maintenance but also limits its use in applications requiring brush-type motors (e.g., some tools).

8. **Potential for Higher Noise/Vibration** Older or poorly maintained split-phase motors can produce more noise and vibration than modern designs, though this is often mitigated with proper mounting and alignment.

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The **Dayton 5K911C** is a solid, reliable choice for **light-duty, single-phase applications** where a small, efficient motor is needed. It excels in **appliances, fans, small pumps, or tools** that require consistent but not extreme performance. However, it is **not ideal for high-torque, variable-speed, or heavy-duty tasks** without modifications.

- **Low to moderate continuous use** (e.g., a desk fan, small compressor, or light-duty machine),

- **Standard 115V power supply**,

- **Minimal maintenance requirements,**

then this motor is a **cost-effective and dependable option**.

- **High torque or variable speed**,

- **Extreme environmental conditions**,

- **Long-term heavy-duty operation,**

- A **higher HP motor** (e.g., 1/2 HP or 3/4 HP),

- A **brushless or EC motor** for efficiency and speed control,

- A **NEMA-rated motor** for industrial or harsh environments,

- Or a **VFD-controlled motor** if adjustable speed is critical.

---

- You need a **simple, reliable, and affordable** motor for a **light-duty application** (e.g., replacing an old fan motor, small appliance motor, or low-power tool).

- Your electrical system is **stable and 115V-compatible**.

- You are willing to **monitor for voltage fluctuations** and **replace bearings** if needed over time.

- Your application requires **high torque, frequent starts/stops, or variable speed**.

- You operate in **extreme environments** (high heat, humidity, or corrosive conditions) without additional protection.

- You need **long-term heavy-duty performance** without potential upgrades (e.g., adding a VFD).

- For **better efficiency and speed control**, look into **brushless DC motors** or **EC motors**.

- For **higher torque**, consider a **1/2 HP or 3/4 HP split-phase motor**.

- For **industrial use**, opt for a **NEMA-rated motor** with built-in protections.

Overall, the **Dayton 5K911C is a practical and budget-friendly motor for basic needs**, but its limitations should be carefully weighed against your specific requirements.

Details:

VINTAGE DAYTON SPLIT-PHASE ELECTRIC MOTOR 1/4 HP 1725 RPM 1/2 SHAFT 115V, RUNS FINE - SEE VIDEO, GOOD USED CONDITION WITH NORMAL USAGE WEAR AND AGE HAS SURFACE RUST SPOTS, SCUFFS/SCRATCHES, DINGS, DUST ON/IN IT, PAINT/FINISH WEAR, BEARINGS MAY NEED OILED OIL PORTS/HOLES, WILL A POWER CORD, model 5K911C HP, 115 V, 5.4 AMPS DIA. Feel free to message me with any questions.

part #: 5k911c prices

• $62.99-$333.99

specifications oelemot:

• brand: Dayton
• mpn: 5k911c
• part type: Hp Motor Shaft
• rated load: Hp
• ac frequency rating: 60 Hz
• special motor construction: Split-phase
• base rpm: 1725
• shaft type: D Profile
• shaft diameter: 1/2 In
• mounting type: Base-mounted, Foot-mounted
• reversible/non-reversible: Reversible
• current type: Ac
• nominal rated input voltage: 115 V
• ac phase: Single Phase
• country of origin: United States

general oelemot:

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

offer oelemot:

• options: Ship-to-home
• started: May 11, 2026
• quantity: 1
• sold: 0
• availability: In Stock

returns oelemot:

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

seller oelemot:

• rating: 100.0%
• city: Mansfield, Ohio
• # reviews: 8844

shipping oelemot:

• cost: $0.00
• transit: 4-10 Days
• carrier: USPS
• class: Standard
• service: USPS Ground Advantage
• type: Fixed

payments oelemot:

• other
• wallet: Apple-pay
• credit card: Diners-club

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