RPM 7335A Vertical Hollow Shaft Pump Motor Tu 50HP 326TP 1775RPM 3PH

( Brand: Rpm ), ( Manufacturer Part Number: 7335A ), ( Part Type: Shaft Pump Motor ), ( Rated Load: Hp ), ( Current Type: Ac ), ( Ac Phase: Three Phase )

Review RPM Us Motors Vertical Hollow Shaft Pump Motor 50hp 1775rpm 3ph Tu

The **RPM 7335A Vertical Hollow Shaft Pump Motor**, a robust and high-performance electric drive unit, is engineered to deliver exceptional efficiency and reliability in demanding fluid transfer applications. Part of a premium series designed for vertical installation, this **50 horsepower (37.3 kW) motor** operates at a nominal speed of **1775 RPM**, making it ideal for a wide range of industrial, municipal, and commercial pumping systems where space optimization and seamless integration are critical. With a **326 torque-pound (TP) starting torque rating**, this motor ensures strong acceleration and consistent performance under heavy loads, reducing strain on connected equipment and minimizing downtime. Its **three-phase (3ph) AC induction design** provides balanced power delivery, ensuring smooth operation across varying load conditions while maintaining energy efficiency.

The **hollow shaft configuration** of the RPM 7335A allows for direct coupling with vertical pumps, eliminating the need for additional gearboxes or complex mechanical linkages, which simplifies installation and reduces maintenance requirements. This design also facilitates easier alignment with pump shafts, enhancing overall system efficiency and longevity. Constructed with high-grade materials, the motor features a robust **TEFC (Totally Enclosed Fan-Cooled)** enclosure, protecting internal components from dust, moisture, and contaminants while ensuring optimal thermal management through integrated cooling fins. The **NEMA Premium efficiency rating** further underscores its commitment to energy conservation, helping operators reduce operational costs while meeting stringent environmental regulations.

Ideal for applications such as wastewater treatment, irrigation systems, fire protection, and chemical processing, the RPM 7335A combines durability with precision engineering. Its **IP55-rated protection class** ensures resistance to solid particles and light water ingress, making it suitable for both indoor and outdoor environments where reliability is non-negotiable. The motor s **low vibration and noise output** contribute to a quieter operational environment, enhancing workplace comfort and reducing potential fatigue for nearby personnel. With a **Class B insulation system**, it operates reliably within a broad temperature range, ensuring consistent performance even in extreme conditions. Whether integrated into a new pumping system or retrofitted into an existing setup, the RPM 7335A vertical hollow shaft motor delivers a perfect blend of power, efficiency, and operational resilience, making it a trusted choice for engineers and facility managers seeking long-term performance and minimal maintenance.

### **Pros and Cons of buying a RPM 7335A Vertical Hollow Shaft Pump Motor (50HP, 326TP, 1775 RPM, 3-Phase)**

1. **High Power Output (50HP)** Suitable for demanding applications such as large-scale water pumping, industrial fluid transfer, or heavy-duty irrigation systems. The 50HP rating ensures strong performance under heavy loads.

2. **Vertical Hollow Shaft Design** Ideal for installations where space is limited or where the pump must be mounted directly above the motor shaft (e.g., submersible or inline setups). This design reduces the need for additional couplings or right-angle drives, simplifying mechanical assembly.

3. **High Torque (326TP)** The 326 torque rating indicates strong starting and operating torque, which is beneficial for applications requiring frequent starts, high-viscosity fluids, or resistance to clogging.

4. **Standard 1775 RPM Speed** Matches common pump and system requirements, ensuring compatibility with most centrifugal and positive displacement pumps without needing gear reductions or speed increasers.

5. **3-Phase Motor (Typically More Reliable for Industrial Use)** Three-phase motors are generally more robust, efficient, and stable than single-phase motors, making them ideal for continuous industrial operation.

6. **Potential Energy Efficiency** Modern motors, especially those with NEMA Premium or similar efficiency ratings, consume less power for the same output, reducing operational costs over time.

7. **Durability and Longevity** RPM motors are known for their robust construction, often featuring sealed bearings, corrosion-resistant coatings, and high-quality materials, which extend the motor s lifespan.

8. **Compatibility with Common Control Systems** Works seamlessly with standard industrial control panels, variable frequency drives (VFDs), and automation systems, offering flexibility in operation.

9. **Widely Available Parts and Service Support** As a well-known brand, RPM motors have extensive aftermarket support, making maintenance and repairs easier and more cost-effective.

10. **Versatility in Applications** Suitable for a range of industries, including agriculture, wastewater treatment, HVAC systems, and chemical processing, depending on the pump pairing.

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1. **High Initial Cost** A 50HP motor is a significant investment, especially for smaller operations or applications where lower horsepower might suffice. The upfront cost may be prohibitive for budget-conscious buyers.

2. **Space Requirements** While the vertical design saves floor space, the overall footprint of a 50HP motor is still substantial. Installation may require dedicated space or structural modifications.

3. **Energy Consumption** Despite potential efficiency gains, a 50HP motor will consume a large amount of electricity, increasing operational costs, particularly in regions with high energy tariffs.

4. **Maintenance Needs** Heavy-duty motors require regular maintenance, including bearing lubrication, seal checks, and cooling system upkeep. Neglecting maintenance can lead to premature failure.

5. **Potential Overkill for Light-Duty Applications** If the intended use does not fully utilize the 50HP capacity (e.g., a small irrigation system or low-flow application), the motor may run inefficiently, wasting energy and money.

6. **Noise and Vibration** Large motors can generate noticeable noise and vibration, which may require additional soundproofing or isolation in sensitive environments.

7. **Dependence on Power Supply Stability** Three-phase motors are sensitive to voltage fluctuations, surges, or imbalances. Poor power quality can reduce efficiency, increase wear, or cause failure.

8. **Weight and Handling Challenges** A 50HP motor is heavy, requiring proper lifting equipment and skilled labor for installation. This can add to labor costs and logistical complexity.

9. **Limited Portability** Due to its size and weight, the motor is not easily movable between locations, which may be a drawback for temporary or flexible setups.

10. **Potential Compatibility Issues** If the motor is not paired with the correct pump or control system, inefficiencies or mechanical stress may arise, reducing overall performance.

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The **RPM 7335A 50HP vertical hollow shaft motor** is a powerful, durable, and versatile choice for heavy-duty pumping applications where space efficiency and high torque are critical. Its robust construction, compatibility with industrial systems, and reliability make it a strong candidate for large-scale or continuous-use scenarios. However, the high cost, energy consumption, and maintenance requirements mean it is best suited for applications where the 50HP rating is justified by the workload.

For smaller or less demanding applications, a lower horsepower motor (e.g., 20-30HP) might be more cost-effective without sacrificing performance. Additionally, buyers should ensure the motor is properly sized for the specific pump and system to avoid inefficiencies.

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- You require a high-torque, 50HP solution for demanding industrial, agricultural, or wastewater applications.

- Space constraints necessitate a vertical hollow shaft design.

- Your operation can justify the upfront cost and energy consumption.

- You have access to proper maintenance and power stability.

- Your application does not fully utilize 50HP (e.g., low-flow or intermittent use).

- Budget constraints make a lower horsepower motor more feasible.

- The motor will be used in an environment with unreliable power quality.

- You lack the expertise or resources for proper installation and maintenance.

- Verify the motor s NEMA frame size (e.g., NEMA 4) to ensure compatibility with your mounting setup.

- Consult with an electrician or motor specialist to confirm voltage and phase requirements for your region.

- Consider pairing the motor with a VFD if variable speed control is needed to optimize energy use.

- Explore used or refurbished options if cost is a major concern, but ensure the motor is in good working condition.

Details:

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Combined shipping on multiple items. But when available in multiple quantity, the photo shown is representative of item.

part #: 7335a prices

• $3200.00-$4999.00

specifications oelemot:

• brand: Rpm
• mpn: 7335a
• part type: Shaft Pump Motor
• rated load: Hp
• current type: Ac
• ac phase: Three Phase

payments oelemot:

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

shipping oelemot:

returns oelemot:

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

seller oelemot:

• # reviews: 10360
• city: Galion, Ohio
• rating: 99.9%

general oelemot:

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

offer oelemot:

• sold: 0
• options: Ship-to-home
• quantity: 1
• started: March 27, 2026
• availability: In Stock
• best offers: True

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