US MOTORS K55HXRJH-1988 Motor Rpm Cap 115-V 3/4HP 950 PH1 Cap.

( Brand: Us Motors ), ( Manufacturer Part Number: K55HXRJH-1988 ), ( Type: Direct Drive ), ( Voltage: 115 ), ( Amperage: 12.5 ), ( Features: 4 Speed ), ( Item Weight: 21 Lb ), ( Power Phase: 1 Phase )

Review US MOTORS Motor 115 3/4hp Speed 950 Rpm Ph1 Cap. Fast Shipping

The **K55HXRJH-1988 Motor**, a robust and high-performance electric motor, is a versatile industrial workhorse designed for demanding applications requiring reliable power and precision operation. Engineered with a **115/4 horsepower (HP) output**, this motor delivers a balanced blend of torque and efficiency, making it ideal for a wide range of machinery, including conveyors, pumps, compressors, and industrial fans. Operating at a nominal speed of **950 revolutions per minute (RPM)**, it strikes an optimal balance between speed and torque, ensuring smooth and consistent performance even under heavy loads. The motor features a **Phase 1 (single-phase) capacitor-start design**, which provides efficient starting torque while maintaining stable operation once the motor reaches full speed. This configuration is particularly advantageous in applications where energy efficiency and reduced power draw during startup are critical.

Constructed with **high-grade materials**, the K55HXRJH-1988 is built to withstand the rigors of continuous operation in industrial environments. Its robust frame and precision-engineered components ensure durability and longevity, minimizing downtime and maintenance requirements. The motor s compact yet sturdy design allows for easy integration into various mechanical systems, while its efficient cooling system prevents overheating, even during prolonged use. Whether deployed in manufacturing plants, commercial facilities, or agricultural settings, this motor operates with quiet efficiency, delivering consistent performance without compromising on power or reliability.

Ideal for applications where space and performance are key considerations, the K55HXRJH-1988 motor is a dependable choice for engineers and operators seeking a balance of strength and versatility. Its **950 RPM rating** ensures that it can handle medium-speed applications with ease, while its **115/4 HP capacity** guarantees sufficient power to drive heavy-duty equipment without strain. The inclusion of a **capacitor-start mechanism** further enhances its operational flexibility, allowing it to start smoothly under load while maintaining energy efficiency. With its combination of performance, durability, and adaptability, this motor is a dependable asset for any industrial or commercial setting where dependable electric power is essential.

### **Analysis of the K55HXRJH-1988 Motor (115 3/4 HP, 950 RPM, Phase 1, Capacitor Start)**

1. **High Power Output (115 3/4 HP)** Suitable for heavy-duty applications such as large compressors, conveyors, pumps, or industrial machinery where significant torque and power are required.

2. **High RPM (950 RPM)** Ideal for applications where high-speed operation is necessary, such as centrifugal pumps, fans, or certain types of industrial equipment.

3. **Durable Construction** Likely built with robust materials (e.g., cast iron housing, reinforced windings) to handle continuous operation under load.

4. **Capacitor Start Design** Provides smoother starting torque compared to direct-on-line motors, reducing inrush current and mechanical stress on connected equipment.

5. **Compatibility with Standard Voltage (115V)** Works well with typical industrial or commercial electrical systems in North America.

6. **Potential for Long Lifespan** If properly maintained, high-quality motors like this can last decades in industrial settings.

7. **Aftermarket Availability** Being a well-known model, replacement parts (brushes, bearings, windings) may be easier to source than for obscure motors.

1. **Age of the Model (1988)** Older design may lack modern efficiency improvements (e.g., energy-saving features, better cooling systems, or digital diagnostics).

2. **Potential for Higher Energy Consumption** Older motors often have lower efficiency ratings compared to modern NEMA Premium or IE3/IE4 standards, leading to higher operating costs.

3. **Maintenance Requirements** May require more frequent bearing lubrication, brush replacements (if applicable), or winding inspections due to wear over time.

4. **Limited Warranty or Support** Original manufacturer support may no longer be available, and extended warranties are unlikely for such an old model.

5. **Size and Weight** Larger motors like this can be bulky and require careful handling during installation or replacement.

6. **Compatibility Issues** If the application has evolved (e.g., variable frequency drives, modern control systems), this motor may not integrate seamlessly without additional modifications.

7. **Environmental Concerns** Older motors may contain materials (e.g., asbestos in insulation) that are now regulated or banned, posing disposal challenges.

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The **K55HXRJH-1988 motor** is a **reliable, high-power workhorse** well-suited for **heavy-duty, continuous-duty industrial applications** where raw power and durability are prioritized over energy efficiency. It excels in scenarios such as:

- Large air compressors

- High-capacity conveyors or elevators

- Industrial pumps (e.g., water, chemical, or sewage systems)

- Manufacturing equipment requiring consistent torque

However, if **energy efficiency, modern control compatibility, or long-term cost savings** are critical, a **modern NEMA Premium or IE3/IE4 motor** (e.g., 2010s or newer) would be a better long-term investment. The trade-off is that the older motor may **cost less upfront** but could lead to **higher operational expenses** over time due to inefficiency.

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- You need a **high-torque, high-RPM motor** for a legacy system where replacement parts are readily available.

- The motor is **already in use** and functioning well, and you lack the budget for a newer model.

- The application **does not require energy-efficient operation** (e.g., short-cycle use, non-critical processes).

- You can **maintain it properly** (regular lubrication, cooling checks, and prompt repairs).

- You are **replacing an old motor** opt for a **modern, energy-efficient motor** (e.g., TEFC, explosion-proof if needed) to reduce long-term costs.

- The application **can accommodate variable speed drives (VSDs)** a newer motor with VSD compatibility will save energy.

- You prioritize **lower operating costs** newer motors (even slightly more expensive) will pay for themselves in reduced electricity bills.

- The motor is being purchased **for a new installation** modern motors offer better reliability and regulatory compliance.

- **Refurbished or Remanufactured Motors:** If buying new is prohibitive, a **remanufactured version** of this model (or a similar high-torque motor) may offer a middle ground with improved efficiency and warranty.

- **Energy-Saving Upgrades:** If keeping the motor, consider adding a **soft starter or VFD** to improve efficiency and reduce wear.

- **Consult an Electrician:** Verify that the motor s **voltage, phase, and mechanical compatibility** match your system before purchase.

**Final Verdict:** The K55HXRJH-1988 is a **solid choice for legacy systems or high-demand applications where cost is not the primary concern**, but for new installations or efficiency-focused projects, a **modern replacement** is strongly recommended.

Details:

I will NEVER take longer than 24 hours to respond. This Used motor has been tested and works just as it should, comes with 15 F capacitor. If I can ship something for around the same price with Priority Mail, insured will. Please look at the photos for best.

The shaft shows that it has been mounted but looks very clean. I Usually will get back to you within a few hours. I am an honest, reasonable guy but do make mistakes and will often go above beyond to resolve any issues. I only ask a few things from you.

part #: k55hxrjh1988 prices

• $161.99-$225.00

specifications fablowehva:

• brand: Us Motors
• mpn: K55hxrjh-1988
• type: Direct Drive
• voltage: 115
• amperage: 12.5
• features: 4 Speed
• item weight: 21 Lb
• power phase: 1 Phase

payments fablowehva:

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

general fablowehva:

• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Fans Blowers
• condition: Used

seller fablowehva:

• rating: 99.2%
• city: Newark,
• # reviews: 4363

offer fablowehva:

• quantity: 1
• sold: 0
• started: April 9, 2026
• options: Ship-to-home
• availability: In Stock

returns fablowehva:

• policy: No Returns

shipping fablowehva:

• type: Calculated
• cost: $0.00
• carrier: USPS
• transit: 5-11 Days
• service: USPS Priority Mail Large Flat Rate Box, USPS Ground Advantage
• class: Expedited, Standard

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