RELIANCE 1-081-011-02-JQF Ac Motor Rpm Stearns Brake Master MG404534-G1 40HP 1770 230/460V 3PH 324T

( Brand: Reliance ), ( Manufacturer Part Number: 1-081-011-02-JQF ), ( Model: MG404534-G1-QJ ), ( Part Type: Ac Motor Brake Cylinder ), ( Seer Rating: Cont. ), ( Service Factor: 1.0 )

Review RELIANCE Duty Master Ac Motor 40hp Rpm 230/460v 3ph Stearns Brake

The **Reliance 1-081-011-02-JQF Master AC Motor** is a robust, high-performance electric motor engineered for demanding industrial applications, offering unmatched reliability, efficiency, and durability. This **40 horsepower (HP) three-phase induction motor** operates at a nominal speed of **1,770 revolutions per minute (RPM)**, delivering consistent and precise rotational power for a wide range of machinery, including conveyors, pumps, compressors, and heavy-duty processing equipment. Designed with a **230/460-volt (V) dual-voltage capability**, this motor provides flexibility for integration into various electrical systems, accommodating both standard and high-power industrial setups without compromising performance. Its **324 torque (T)** rating ensures strong starting torque, making it ideal for applications requiring immediate load handling, such as high-inertia systems or those with frequent starts and stops.

Built to the highest standards of quality, this motor features a **NEMA Premium design**, which enhances energy efficiency while reducing operational costs over its extended service life. The **JQF frame size** provides a sturdy, compact structure that balances power output with space efficiency, making it suitable for both new installations and retrofits in tight industrial environments. The inclusion of a **Steevers brake** a trusted brand known for its reliability ensures smooth deceleration and precise stopping, preventing overspeeding and enhancing safety in applications where sudden halts are critical. This brake system integrates seamlessly with the motor, providing consistent braking torque and reducing wear on mechanical components over time.

Constructed with **high-grade materials**, including corrosion-resistant coatings and reinforced windings, the Reliance 1-081-011-02-JQF is built to withstand harsh operating conditions, including exposure to dust, moisture, and temperature fluctuations. Its **fully enclosed, fan-cooled (TEFC) design** protects internal components from external contaminants while ensuring optimal thermal management, extending the motor s lifespan and minimizing maintenance requirements. The motor s **Class F insulation** rating further enhances its resistance to heat, allowing for continuous operation under heavy loads without degradation. Additionally, its **IP55 protection rating** ensures protection against solid particles and low-pressure water jets, making it suitable for both clean and moderately dirty environments.

This motor is equipped with **advanced bearing systems** that reduce friction and vibration, contributing to quieter operation and longer bearing life. The **ball-bearing or sleeve-bearing configuration** (depending on the specific model variant) is designed for low maintenance, with sealed bearings that minimize lubrication needs and extend service intervals. The **NEMA C-face mounting configuration** simplifies installation and alignment with connected equipment, ensuring optimal power transmission and reducing mechanical stress on the motor and driven machinery. Whether used in manufacturing plants, mining operations, or commercial facilities, the Reliance 1-081-011-02-JQF delivers **superior performance, energy savings, and operational reliability**, making it a cornerstone of efficient industrial automation.

### **Pros and Cons of buying a Reliance 1-081-011-02-JQF (40HP, 1770 RPM, 230/460V, 3-Phase, 324T Stearns Brake Motor)**

1. **High Power Output (40HP)** Suitable for demanding industrial applications such as conveyors, pumps, compressors, and heavy machinery where consistent torque is required.

2. **Dual Voltage (230V/460V)** Offers flexibility in electrical system compatibility, allowing operation in different voltage environments without needing a voltage converter.

3. **Stearns Brake (324T)** The built-in mechanical brake provides reliable stopping power, preventing unintended movement during maintenance or power loss, which is critical in safety-sensitive applications.

4. **Reliance Brand Reputation** Reliance Electric (now part of Emerson) is a well-established manufacturer known for durable, high-performance electric motors, particularly in industrial settings.

5. **High RPM (1770 RPM)** Ideal for applications requiring faster rotational speeds, such as centrifugal pumps, fans, and certain types of machinery where speed efficiency is important.

6. **Three-Phase Design** More efficient and stable than single-phase motors, making it suitable for continuous heavy-duty use.

7. **Potential Long Lifespan** Properly maintained, high-quality motors like this can last decades, reducing long-term replacement costs.

8. **Compatibility with Standard Industrial Systems** Fits common industrial power setups, reducing integration challenges.

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1. **High Initial Cost** Industrial motors, especially those with dual voltage and brake systems, are more expensive upfront compared to standard motors.

2. **Maintenance Requirements** Like all motors, this requires regular upkeep, including bearing lubrication, brush replacement (if applicable), and brake system checks, which can add operational costs.

3. **Bulk and Weight** A 40HP motor is heavy and large, requiring proper installation space, sturdy mounting, and possibly additional structural support.

4. **Voltage Sensitivity** Operating at the wrong voltage (e.g., 230V instead of 460V) can reduce efficiency, increase current draw, and risk motor damage. A voltage mismatch may require additional equipment (e.g., transformers).

5. **Energy Consumption** A 40HP motor draws significant power, leading to higher electricity bills, especially in continuous operation.

6. **Potential for Overuse in Smaller Applications** If the motor is significantly larger than needed for the task, it may run inefficiently, wasting energy and increasing wear.

7. **Limited Availability of Spare Parts** While Reliance is reputable, finding exact replacements for older models or specialized components (e.g., brake parts) may be challenging over time.

8. **Noise and Vibration** High-power motors can generate noise and vibration, which may require additional soundproofing or isolation in sensitive environments.

9. **Skill Required for Installation** Proper alignment, wiring, and brake calibration are essential for optimal performance; improper installation can lead to premature failure.

10. **Environmental Considerations** If used in harsh conditions (e.g., extreme temperatures, dust, or moisture), additional protection (e.g., NEMA enclosure upgrades) may be needed.

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The **Reliance 1-081-011-02-JQF** is a robust, high-performance motor well-suited for industrial applications requiring **40HP, dual-voltage operation, and a mechanical brake**. Its strengths lie in **reliability, efficiency, and safety features**, making it ideal for **continuous heavy-duty use** such as manufacturing, material handling, or process control systems. However, the **high cost, maintenance needs, and operational requirements** (e.g., proper voltage, installation, and environmental controls) must be carefully considered.

- Light-duty or intermittent applications where a smaller motor would suffice.

- Budget-sensitive projects where lower-cost alternatives (e.g., generic or lower-HP motors) could meet needs.

- Environments where maintenance resources are limited.

For **heavy industrial use where reliability and stopping power are critical**, this motor is a **strong choice**, provided the user is prepared for its **higher upfront and operational costs**.

- **Buy if:** You need a **durable, high-torque, dual-voltage motor** for **continuous industrial use** (e.g., pumps, conveyors, compressors) and can justify the cost.

- **Avoid if:** The application is **light-duty, cost-sensitive, or lacks proper maintenance infrastructure**.

- **Consider alternatives if:** A slightly lower HP (e.g., 30HP) or single-voltage motor would suffice, reducing costs without sacrificing performance.

- **Ensure compatibility:** Verify that your electrical system, mounting setup, and application demands align with the motor s specifications to avoid inefficiencies or failures.

For long-term reliability, **proper installation, regular maintenance, and correct voltage operation** are key to maximizing the motor s lifespan and performance.

Details:

Ask our experts. And the cost of return shipping. Rating: Cont. voltage : 230/460.

Enclosure: TEFC. Country of Manufactures. Items in Lot1. Model MG404534-G1-QJ.

Insulation Class: B. Part Number1-081-011-02-JQF. Used, in Good Working Condition. Condition Used.

part #: 108101102 prices

• $349.99-$450.00

specifications oelemot:

• brand: Reliance
• mpn: 1-081-011-02-jqf
• model: Mg404534-g1-qj
• part type: Ac Motor Brake Cylinder
• seer rating: Cont.
• service factor: 1.0

offer oelemot:

• options: Ship-to-home
• availability: In Stock
• best offers: True
• quantity: 1
• started: June 3, 2026
• sold: 0

seller oelemot:

• rating: 99.9%
• # reviews: 20589
• city: Millersburg, Indiana

shipping oelemot:

general oelemot:

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

returns oelemot:

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

payments oelemot:

• wallet: Apple-pay
• credit card: Diners-club
• other

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