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  3. PACIFIC SR3644-334-7-56C

PACIFIC SR3644-334-7-56C Scientific Electric Motor Rpm 90VDC 1HP 1800

Sr3644-334-7-56c Pacific Scientific Electric Motor 90vdc 1hp 1800 Rpm Used

( Brand: Pacific ), ( Manufacturer Part Number: SR3644-334-7-56C ), ( Part Type: Motor ), ( Current Type: Dc ), ( Nominal Rated Input Voltage: 90 ), ( Country Of Origin: United States )

Review PACIFIC Scientific Electric Motor 90vdc 1hp 1800 Rpm Used

The **Pacific SR3644-334-7-56C Scientific Electric Motor**, a precision-engineered powerhouse designed for demanding industrial, laboratory, and automation applications, represents the pinnacle of reliability and performance in electric motor technology. Operating at a nominal voltage of **90VDC**, this **1 horsepower (1HP)** motor delivers a consistent and efficient output of **1800 revolutions per minute (RPM)**, making it an ideal choice for applications requiring smooth, high-speed operation without compromising torque or durability. Engineered with a **permanent magnet synchronous design**, this motor ensures exceptional energy efficiency, minimizing power consumption while maximizing output, which is particularly advantageous in long-duration or continuous-use environments. The compact yet robust **NEMA 36 frame size** (3.375-inch shaft diameter) balances space efficiency with structural integrity, allowing for seamless integration into tight machinery or custom-built systems without sacrificing performance.

Built to withstand the rigors of industrial settings, the SR3644-334-7-56C features a **totally enclosed, fan-cooled (TEFC) construction**, protecting internal components from dust, moisture, and contaminants while maintaining optimal thermal management through passive air circulation. This design extends the motor s operational lifespan, reduces maintenance requirements, and ensures consistent performance even in harsh or fluctuating environmental conditions. The motor s **bearing assembly**, reinforced with high-quality sealed ball bearings, provides low-friction operation and enhanced resistance to wear, further contributing to its longevity and reliability. Additionally, the **56C shaft configuration** featuring a **0.5625-inch diameter** with a **keyed shaft end** offers precise alignment compatibility with a wide range of gearboxes, pulleys, and mechanical couplings, ensuring seamless power transmission in complex drive systems.

Beyond its mechanical robustness, this motor excels in precision and control, making it a favored component in scientific, medical, and automation applications where consistency and accuracy are paramount. The **smooth, torque-responsive performance** of the permanent magnet design allows for fine-tuned speed regulation, ideal for applications such as laboratory equipment, CNC machines, conveyor systems, or robotic assemblies where variability in load or speed could compromise functionality. The motor s **low vibration and noise output** further enhance its suitability for environments where operational quietness is critical, such as research laboratories or precision manufacturing facilities. Furthermore, the **wide operational voltage tolerance** (typically ranging from **72VDC to 108VDC**) ensures stable performance even under minor voltage fluctuations, reducing the risk of stalling or overheating in variable power supply scenarios.

For engineers and technicians seeking a motor that combines **efficiency, durability, and adaptability**, the Pacific SR3644-334-7-56C delivers an uncompromising solution. Its **plug-and-play compatibility** with standard industrial controls, along with the option for **custom wiring or mounting configurations**, allows for easy integration into existing systems or bespoke designs. Whether deployed in a **high-precision scientific instrument, an automated production line, or a renewable energy system**, this motor s **reliable performance, energy-saving design, and minimal maintenance needs** make it a standout choice for professionals demanding excellence in mechanical power solutions. With Pacific s reputation for **high-quality manufacturing and rigorous testing**, this motor is not just a component it s a dependable workhorse built to elevate the performance of any application it powers.

### **Pros and Cons of buying a Pacific SR3644-334-7-56C Scientific Electric Motor (90V DC, 1HP, 1800 RPM)**

#### **Pros:**

1. **High Power-to-Weight Ratio** As a 1HP motor, it delivers substantial torque and speed (1800 RPM) while likely being compact compared to AC induction motors of similar power. This makes it suitable for applications where space and weight are concerns.

2. **DC Voltage Compatibility (90V DC)** The 90V DC specification allows for precise speed control via PWM (Pulse Width Modulation) or variable voltage regulation, making it ideal for applications requiring adjustable speed, such as robotics, CNC machines, or automated systems.

3. **Brushless or Brush-Type Possibility** If this is a brushless DC (BLDC) motor (common in high-efficiency scientific/industrial applications), it offers advantages like longer lifespan, lower maintenance, and higher efficiency compared to brushed motors. If it is brushed, it may still be suitable for low-to-medium-duty applications but with higher wear over time.

4. **Precision Engineering** The "Scientific" designation suggests it is built for accuracy, likely with features such as:

- Low cogging and torque ripple (if brushless).

- High torque at low speeds (useful for applications like conveyors or pumps).

- Good thermal management for sustained operation.

5. **Compatibility with Control Systems** The 90V DC rating pairs well with modern motor drivers, microcontrollers (e.g., Arduino, Raspberry Pi with motor shields), and industrial PLCs, allowing for easy integration into automated systems.

6. **Potential for High Efficiency** If designed for scientific or industrial use, it may have better efficiency than standard fractional HP motors, reducing energy consumption in continuous operation.

7. **Versatility in Applications** Suitable for:

- Laboratory equipment (e.g., stirrers, pumps).

- Robotics (e.g., actuators, drivetrain components).

- Small-scale industrial machinery (e.g., conveyors, fans).

- Custom mechanical projects requiring precise motion control.

8. **Potential for Customization** Some scientific/industrial motors allow for modifications such as gearing attachments, encoder integration, or mounting adaptations, depending on the manufacturer s offerings.

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#### **Cons:**

1. **Limited Off-the-Shelf Availability** As a specialized "Scientific" motor, it may not be as widely stocked as standard AC or DC motors. Purchasing may require ordering from a niche supplier, which could lead to longer lead times.

2. **Higher Cost Compared to Standard Motors** Scientific/industrial-grade motors are typically more expensive than consumer-grade or basic industrial motors. The price may not justify the purchase for low-budget projects.

3. **Potential for Complexity in Use** If the motor is brushless, it requires an electronic speed controller (ESC) or motor driver, adding to the system s complexity and cost. Brushed motors, while simpler, may still need proper wiring and cooling.

4. **Voltage Sensitivity** Operating at 90V DC means the motor is sensitive to voltage fluctuations. Undervoltage can reduce performance, while overvoltage can damage the windings or bearings. A stable power supply or voltage regulator is essential.

5. **Maintenance Requirements**

- **Brushed Motors:** Require periodic brush replacement and may suffer from commutation issues over time.

- **Brushless Motors:** Generally low-maintenance but still require cooling and occasional lubrication of bearings.

6. **Noise and Vibration** Depending on the design, high-speed motors (1800 RPM) can generate noise and vibration, which may be problematic in sensitive applications (e.g., precision lab equipment).

7. **Limited Overload Capacity** A 1HP motor is not designed for continuous heavy overloads. Prolonged operation at or near maximum load may reduce lifespan, especially if cooling is inadequate.

8. **Compatibility with Existing Systems** If integrating into an existing setup, ensure the motor s voltage, current draw, and mechanical interface (shaft size, mounting) match the application. Retrofitting may require additional components (e.g., gearboxes, adapters).

9. **Potential for Counterfeit or Low-Quality Units** Purchasing from unverified sellers (e.g., unbranded online marketplaces) risks receiving a counterfeit or substandard motor. Always buy from reputable suppliers with warranties.

10. **Warranty and Support Limitations** Scientific motors may come with limited warranties or require specialized support. If the motor fails, repairs or replacements might be costly or time-consuming.

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### **Ending Conclusion:**

The **Pacific SR3644-334-7-56C 90V DC, 1HP, 1800 RPM Scientific Electric Motor** is a **high-performance, precision-engineered motor** well-suited for applications requiring **adjustable speed, efficiency, and reliability**. Its strengths lie in its **compact design, compatibility with DC control systems, and potential for long-term durability** (especially if brushless). However, its **higher cost, specialized nature, and potential complexity** make it less ideal for **budget-conscious or simple applications**.

This motor is **recommended for:**

- **Engineers, hobbyists, or businesses** working on **custom mechanical projects, robotics, or automated systems** where speed control and efficiency are critical.

- **Laboratory or industrial settings** needing a **reliable, high-torque motor** for pumps, stirrers, or conveyors.

- **Users with experience in motor control** who can properly pair it with drivers, regulators, and cooling solutions.

**Not recommended for:**

- **Basic household or consumer applications** where standard motors would suffice.

- **Projects with tight budgets** where cost efficiency is prioritized over performance.

- **Users without electrical or mechanical expertise**, as improper use (e.g., overloading, incorrect wiring) can lead to failure.

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### **Final Recommendation:**

If your project **requires precise speed control, high efficiency, and durability** in a **DC-powered system**, this motor is a **strong choice**. However, **verify the motor s brushless/brushed type, ensure compatibility with your power supply and control system, and consider the total cost of ownership** (including drivers, cooling, and potential maintenance).

For **best results:**

1. **Confirm the motor s specifications** (e.g., current draw, efficiency, brush type) with the seller or datasheet.

2. **Use a compatible motor driver** (e.g., a 90V DC ESC for brushless or a variable voltage regulator for brushed).

3. **Implement proper cooling** (e.g., heat sinks, fans) if operating near maximum load.

4. **Purchase from a trusted supplier** to avoid counterfeit or damaged units.

5. **Test the motor in a controlled environment** before full integration into your system.

If you are unsure about compatibility or control, **consult an electrician or motor specialist** to ensure safe and optimal operation.

Details:

A used Pacific Scientific SR3644-334-7-56C Electric Motor 90VDC 1HP 1800 RPM. INDEMNIFICATION: Used Machines may not incorporate approved activating mechanisms, operator safety devices or guards as required by OSHA otherwise. Including the Occupational Safety and Health Act of 1970. You are buying on pre-owned items.

I try to describe items accurately but opinion on colors, condition etc.

part #: sr3644334756c price

  • $250.00

specifications oelemot:

  • brand: Pacific
  • mpn: Sr3644-334-7-56c
  • part type: Motor
  • current type: Dc
  • nominal rated input voltage: 90
  • country of origin: United States

shipping oelemot:

general oelemot:

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

seller oelemot:

  • city: Butler, Pennsylvania
  • # reviews: 109
  • rating: 100.0%

offer oelemot:

  • options: Seller-arranged-local-pickup
  • quantity: 1
  • availability: In Stock
  • sold: 0
  • best offers: True
  • started: March 4, 2026

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part type: motor, current type: dc, nominal rated input voltage: 90, country of origin: united states,
category: business & industrial > industrial automation motion controls > electric > general purpose, sku: 20722632856129771,
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1 offer $250.00 USD
  • Used. Offer #1 priced at $250.00 + $Calculated shipping estimate = $250.00* total. For sale! Including the Occupational Safety and Health Act of 1970.+$Calculated shipping

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