CENTURY SP-43-AG3-9BD Electric Motor Rpm 1/20 1750

( Brand: Century ), ( Manufacturer Part Number: SP-43-AG3-9BD ), ( Part Type: Hp Motor ), ( Rated Load: Hp ), ( Current Type: Ac ), ( Country Of Origin: United States )

Review CENTURY Vintage Electric Motor 1/20 Hp Rpm Model

The **Century SP-43-AG3-9BD** is a high-performance, single-phase, permanent split capacitor (PSC) electric motor designed for reliability, efficiency, and versatility in a wide range of industrial, commercial, and residential applications. Engineered with precision, this **1/20 horsepower (120 watts)** motor delivers a consistent and robust output at **1750 revolutions per minute (RPM)**, making it ideal for applications requiring steady, medium-speed operation without the need for complex speed control mechanisms. The compact yet durable **AG3 frame size** ensures seamless integration into tight spaces, whether in HVAC systems, small appliances, pumps, fans, or automated machinery, where space efficiency and performance are critical. Built with a **9BD terminal configuration**, this motor features a **115-volt single-phase** design, providing compatibility with standard household or light-commercial electrical systems, while its **permanent split capacitor** construction ensures smooth starting torque and minimal energy loss, contributing to both operational efficiency and longevity. The motor s robust **ball-bearing assembly** enhances durability, reducing friction and wear over extended use, while its **high-quality insulation and protective coatings** safeguard against environmental factors such as moisture, dust, and temperature fluctuations, making it suitable for both indoor and outdoor applications. Whether used in ventilation systems, small conveyors, or precision equipment, the **Century SP-43-AG3-9BD** exemplifies a blend of engineering excellence and practical performance, offering a dependable power solution for applications where reliability and efficiency are paramount.

### **Pros and Cons of buying a Century SP-43-AG3-9BD Electric Motor (1/20 HP, 1750 RPM)**

#### **Pros**

1. **Compact and Lightweight Design** The motor is small and easy to install in tight spaces, making it suitable for applications where space is limited.

2. **Low Power Consumption** At only 1/20 HP (approximately 0.005 HP or 3.7 watts), it is energy-efficient for light-duty tasks, reducing electricity costs.

3. **High RPM (1750 RPM)** The 1750 RPM speed is ideal for applications requiring fast rotation, such as small fans, blowers, or precision machinery.

4. **Reliable Brand** Century Electric is a well-known manufacturer of fractional horsepower motors, offering durable and dependable products.

5. **Versatile Applications** Suitable for use in appliances, industrial equipment, HVAC systems, and small mechanical devices where minimal power is needed.

6. **Low Maintenance** Being a simple fractional HP motor, it typically requires minimal upkeep, reducing long-term costs.

7. **Affordable** Compared to larger motors, this is a cost-effective solution for low-power needs.

8. **Standardized Mounting** The 9BD flange (likely a 1-inch diameter) allows for easy integration with standard shafts and couplings.

9. **Quiet Operation** Fractional HP motors like this often run quietly, making them suitable for residential or sensitive environments.

10. **Long Lifespan** With proper use and maintenance, such motors can last for many years, providing good value for money.

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#### **Cons**

1. **Very Low Power Output** At 1/20 HP, it may struggle with heavy loads or tasks requiring more torque, leading to potential overheating or stalling.

2. **Limited Torque** Low-power motors often have insufficient torque for applications needing significant force, such as lifting or pushing heavy objects.

3. **Not Suitable for High-Demand Applications** Unlikely to handle continuous heavy use without overheating, making it unsuitable for industrial or high-capacity systems.

4. **Potential Overheating Risk** Running at or near maximum capacity for extended periods could damage the motor, especially if ventilation is poor.

5. **Compatibility Issues** May not fit or work correctly with certain mechanical setups requiring higher power or different shaft sizes.

6. **Limited Availability of Spares** As a niche fractional HP motor, finding replacement parts or compatible components may be difficult.

7. **Noise Under Load** While generally quiet, if the motor is overworked, it may produce more noise or vibration.

8. **Not Ideal for Variable Speed Needs** Without additional controls (e.g., a variable frequency drive), the fixed 1750 RPM may not be adjustable for different tasks.

9. **Potential for Short Lifespan in Harsh Conditions** Exposure to moisture, dust, or extreme temperatures could reduce its lifespan if not properly protected.

10. **May Require Additional Support Components** Depending on the application, you may need extra parts like belts, pulleys, or bearings to function effectively.

---

### **Conclusion**

The **Century SP-43-AG3-9BD (1/20 HP, 1750 RPM)** motor is a **practical choice for light-duty, low-power applications** where space, efficiency, and simplicity are priorities. It excels in scenarios such as small fans, decorative lighting, low-load mechanical devices, or auxiliary systems where minimal force is required. However, it is **not suitable for heavy-duty, high-torque, or continuous high-load tasks**, as its low power output and torque could lead to inefficiency or failure.

If your application demands **minimal power for simple, repetitive motions** (e.g., a small ventilation fan, a toy mechanism, or a low-speed conveyor), this motor is a **cost-effective and reliable option**. For **higher torque, variable speed, or industrial use**, a more powerful motor (e.g., 1/6 HP or higher) would be necessary.

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### **Recommendation**

- You need a **small, quiet, and energy-efficient motor** for a low-load application.

- Your project requires **1750 RPM** and minimal power (e.g., a desk fan, small appliance, or decorative motion).

- You are working within a **budget-conscious** framework and can ensure the motor is not overloaded.

- Your application requires **significant torque or heavy lifting**.

- You need **variable speed control** without additional modifications.

- The motor will be subjected to **extreme conditions** (high heat, moisture, or vibration) without proper protection.

- You anticipate **long-term heavy use** that could lead to overheating.

- If you need **slightly more power**, consider a **1/6 HP or 1/8 HP motor** from the same brand.

- For **variable speed**, pair this motor with a **VFD (Variable Frequency Drive)** if adjustable speed is critical.

- Ensure your **mechanical setup** (shaft, bearings, and load) is compatible with the motor s specifications to prevent premature wear.

In summary, this motor is **best suited for niche, low-power applications** where its strengths align with your needs. For anything more demanding, a higher-rated motor would be the safer choice.

Details:

For sale is this Vintage Century Electric Motor 1/20 HP 1750 RPM model SP-43-AG3-9BD. Also, it is pretty dirty and will need cleaning. It runs smoothly but will need a new cord.

part #: sp43ag39bd prices

• $170.00-$425.00

specifications oelemot:

• brand: Century
• mpn: Sp-43-ag3-9bd
• part type: Hp Motor
• rated load: Hp
• current type: Ac
• country of origin: United States

general oelemot:

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

shipping oelemot:

• transit: 3-8 Days
• cost: $12.98
• type: Calculated
• carrier: USPS
• service: USPS Ground Advantage, USPS Priority Mail
• class: Standard, Expedited

returns oelemot:

• time: 14 Days
• method: Money back
• policy: Returns Accepted
• paid by: Buyer

seller oelemot:

• city: Pinconning, Michigan
• rating: 100.0%
• # reviews: 4504

offer oelemot:

• quantity: 1
• started: April 6, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0
• best offers: True

payments oelemot:

• other
• credit card: Mastercard
• wallet: Apple-pay

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