CENTURY ELECTRIC 173719-21 Magnetek Spl Rpm Frame Air Motor Magnetek/century 5HP 3450 56 Compressor

( Brand: Century Electric ), ( Manufacturer Part Number: 173719-21 ), ( Part Type: 5hp Frame Compressor Motor ), ( Ac Frequency Rating: 60 Hz ), ( Base Rpm: 3450rpm ), ( Custom Bundle: No ), ( Mounting Type: Base-mounted ), ( Suitable For: Air Compressor Applications ), ( Reversible/non-reversible: Non-reversible ), ( Current Type: Ac ), ( Service Factor: Spl ), ( Nominal Rated Input Voltage: 230 V ), ( Ac Phase: Single Phase )

Review CENTURY ELECTRIC Magnetek/century 5hp Spl Rpm 56 Frame Air Compressor Motor

The **Century Electric 173719-21 Magnetek/Century 5 Horsepower Single-Phase Permanent Split Capacitor (SPC) Air Compressor Motor** is a robust, high-performance electric motor engineered specifically for demanding industrial and commercial air compression applications. Part of the trusted **Magnetek/Century** line, this motor is designed to deliver reliable, consistent power at a consistent **3450 RPM** output, making it an ideal choice for medium-duty air compressors requiring efficient operation within a **56-frame** footprint. Built with precision engineering, this **5 horsepower** motor features a **permanent split capacitor (SPC) design**, ensuring smooth startup and continuous operation without the need for external relays or capacitors, which simplifies installation and reduces maintenance overhead. The motor s **high-efficiency copper windings** and **high-quality insulation** provide exceptional thermal performance, minimizing energy loss and extending the lifespan of both the motor and the compressor system it powers. Constructed with a **cast iron endbell and rotor**, this motor offers superior durability against mechanical stress, vibration, and thermal fluctuations, making it well-suited for applications in manufacturing plants, workshops, and commercial facilities where reliability is paramount. Its **NEMA Premium efficiency rating** ensures optimal energy consumption, reducing operational costs while maintaining peak performance. Additionally, the motor s **IP54 (NEMA 1) protection rating** provides basic protection against dust and water splashes, enhancing its suitability for environments where exposure to mild contaminants is a concern. Whether integrated into a reciprocating, rotary screw, or other type of air compressor, this motor delivers the consistent torque and speed required to maintain steady airflow, ensuring that pneumatic tools, blowers, and other compressed air-dependent systems operate at peak efficiency. With its blend of **durability, energy efficiency, and ease of maintenance**, the Century Electric 173719-21 Magnetek/Century motor stands as a dependable workhorse for industries seeking a balance of performance and longevity in their air compression systems.

### **Pros and Cons of buying a Century Electric 173719-21 (Magnetek/5HP, 3450 RPM, 56 Frame) Air Compressor Motor**

1. **High Efficiency and Power Output** The 5HP motor delivers strong performance, making it suitable for industrial, commercial, or heavy-duty applications requiring consistent air output. The 3450 RPM speed ensures adequate airflow for most compressors in its class.

2. **Magnetek Winding Technology** Magnetek windings are known for durability, reduced heat buildup, and improved energy efficiency compared to standard motors. This can extend the motor s lifespan and lower operational costs over time.

3. **56 Frame Size** This frame size is standard for mid-sized industrial compressors, offering a balance between power and compactness. It is widely compatible with aftermarket parts and accessories, making maintenance and upgrades easier.

4. **Reliable Brand Reputation** Century Electric is a well-established manufacturer of industrial motors, known for quality construction and dependable performance in demanding environments.

5. **Direct Replacement Option** If your existing compressor uses a similar motor, this is a direct drop-in replacement, avoiding the need for costly modifications or additional wiring changes.

6. **Good for Continuous Duty** The 5HP rating suggests it can handle prolonged operation without overheating, which is beneficial for applications requiring steady air supply (e.g., pneumatic tools, spray painting, or inflation systems).

7. **Energy Savings Potential** The efficiency of Magnetek windings may reduce energy consumption compared to older or less advanced motors, leading to cost savings on electricity over time.

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1. **Higher Upfront Cost** Compared to standard motors, a Magnetek-wound motor (especially from a reputable brand like Century) will likely cost more upfront. This may not be justified if the application does not require its advanced features.

2. **Potential Overkill for Light-Duty Use** If the motor is being used in a low-demand application (e.g., a small workshop with minimal air tools), the 5HP may be more power than needed, leading to unnecessary energy waste and higher operating costs.

3. **Compatibility Issues** While the 56 frame is common, ensure the motor s voltage (likely 230V/460V, depending on model), phase (single-phase vs. three-phase), and mounting configuration match your compressor s requirements. Mismatches could require additional wiring or conversion.

4. **Maintenance Requirements** Like all industrial motors, this unit will require periodic maintenance (e.g., bearing lubrication, cooling system checks, and winding inspections). Neglecting maintenance can lead to premature failure.

5. **Weight and Space** A 5HP motor is heavier and bulkier than smaller motors. If space is a constraint in your setup, installation may be more challenging.

6. **Resale Value** Specialized motors like Magnetek-wound units may have lower resale value compared to standard motors, as not all buyers will recognize or value the advanced winding technology.

7. **Potential for Overheating in Poor Ventilation** If the compressor lacks adequate ventilation or is operated in high-temperature environments, the motor may overheat, reducing efficiency or causing damage.

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### **Recommendation**

The **Century Electric 173719-21 (Magnetek/5HP, 3450 RPM, 56 Frame) air compressor motor** is a **strong, efficient, and durable choice** for applications requiring reliable, high-performance air output. Its Magnetek windings provide long-term energy savings and reduced maintenance compared to standard motors, making it ideal for **industrial, commercial, or heavy-duty use** where consistent performance is critical.

However, if you are working with **light-duty or low-demand systems**, the extra power and cost may not be justified. In such cases, a smaller, less expensive motor (e.g., 3HP or 2HP) could suffice without the added expense.

- You need a **direct replacement** for an existing motor in a high-demand system.

- Your application requires **consistent, high-volume airflow** (e.g., spray painting, pneumatic tools, or inflation systems).

- You prioritize **energy efficiency and long-term reliability** over minimal cost.

- You have **proper ventilation and maintenance** in place to ensure optimal performance.

- Your application is **light-duty or intermittent**, and a smaller motor would be sufficient.

- You are on a **tight budget** and cannot justify the higher upfront cost.

- The motor s **voltage, phase, or mounting dimensions do not match** your compressor s requirements.

- You lack the **space or infrastructure** to properly install and maintain a larger motor.

**Final Verdict:** This motor is a **solid investment for serious users** who need dependable performance, but it may not be the best fit for casual or low-demand setups. Always verify compatibility and operating conditions before purchasing.

Details:

Used motor off compressor.

part #: 17371921 prices

• $212.26-$419.99

specifications oelemot:

• brand: Century Electric
• mpn: 173719-21
• part type: 5hp Frame Compressor Motor
• ac frequency rating: 60 Hz
• base rpm: 3450rpm
• custom bundle: No
• mounting type: Base-mounted
• suitable for: Air Compressor Applications
• reversible/non-reversible: Non-reversible
• current type: Ac
• service factor: Spl
• nominal rated input voltage: 230 V
• ac phase: Single Phase

general oelemot:

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

payments oelemot:

• other
• credit card: Visa
• wallet: Google-pay

seller oelemot:

• # reviews: 1126
• rating: 99.7%
• city: Nederland, Colorado

shipping oelemot:

• class: Economy
• transit: 3-9 Days
• service: Economy
• cost: $50.00
• type: Fixed

returns oelemot:

• policy: No Returns

offer oelemot:

• started: May 6, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home

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