BALDOR BOSTON GEAR 35N91-1274 Jrtf Ac Motor Rpm 1.5HP 1725 115V/208-230V 1PH 145TC

( Brand: Baldor Boston Gear ), ( Manufacturer Part Number: 35N91-1274 ), ( Model: JRTF-B ), ( Part Type: Ac 5hp Motor ), ( Power Phase: Single ), ( Seer Rating: Cont. ), ( Service Factor: 1.15 )

Review BALDOR BOSTON GEAR Jrtf b Ac Motor 1.5hp Rpm 115v/208-230v 1ph 145tc

The **Baldor-Boston Gear 35N91-1274 JRTF-B AC Motor** is a robust, high-performance electric motor engineered for demanding industrial applications where reliability, efficiency, and durability are paramount. Part of Baldor s renowned **JRTF-B** series, this **1.5 horsepower (HP)** motor delivers consistent performance across a wide range of voltage configurations, making it versatile for integration into various power systems. With a **1725 RPM** synchronous speed at full load, it strikes an optimal balance between speed and torque, ensuring smooth operation in conveyor systems, pumps, compressors, and other mechanical drives where precision and endurance are critical. The motor is designed to operate seamlessly on **single-phase (1PH)** power supplies, accommodating both **115V** and **208-230V** inputs, which enhances its adaptability for different industrial setups without requiring extensive modifications.

Constructed with **Baldor s premium materials and engineering standards**, this motor features a **145TC (Total Circuit)** design, which refers to its thermal protection and overload capacity, ensuring it can withstand continuous operation under heavy loads without overheating. The **JRTF-B** series is renowned for its **NEMA Premium efficiency**, meaning it consumes less energy while maintaining high performance, contributing to lower operational costs and reduced environmental impact. The motor s **closed, drip-proof (CD) or totally enclosed fan-cooled (TEFC)** construction depending on the specific model variant provides robust protection against dust, moisture, and debris, making it ideal for harsh or unregulated environments such as manufacturing plants, food processing facilities, or outdoor applications.

Baldor s reputation for **long-term reliability** is further reinforced by the **high-quality bearings, precision-wound stator windings, and robust rotor design** incorporated into this motor. The **1.5HP rating** ensures it can handle moderate to heavy-duty applications with ease, while its **smooth operation and low vibration levels** contribute to extended equipment lifespan and reduced maintenance requirements. Additionally, the motor s **compatibility with standard Baldor-Boston Gear gearboxes and speed reducers** allows for seamless integration into complex drive systems, enabling precise speed control and torque amplification where needed. Whether used in material handling, HVAC systems, or industrial automation, this motor exemplifies Baldor s commitment to delivering **durable, energy-efficient, and high-performance electric solutions** that meet the rigorous demands of modern industry.

### **Baldor-Boston 35N91-1274 JRTF-B AC Motor: Pros and Cons**

1. **Reliability and Brand Reputation** Baldor-Boston (now part of Emerson Electric) is a well-established manufacturer known for durable, high-quality industrial motors. Their motors are designed for long-term performance in demanding applications.

2. **Energy Efficiency** This motor is likely designed to meet or exceed NEMA Premium efficiency standards, which means it consumes less power while maintaining performance, leading to cost savings on electricity.

3. **Wide Voltage Range (115V/208-230V)** The dual-voltage capability makes it versatile for different electrical systems without requiring additional components, making it suitable for various industrial or commercial setups.

4. **High RPM (1725 RPM)** The 1725 RPM speed is standard for single-phase motors and is well-suited for applications requiring moderate to high-speed operation, such as pumps, fans, or conveyors.

5. **NEMA Premium Efficiency** If this motor is indeed NEMA Premium-rated, it will have lower energy consumption and reduced heat generation compared to standard efficiency motors, improving operational efficiency.

6. **Single-Phase Design** Simpler to install and operate compared to three-phase motors, making it a good choice for smaller facilities or applications where three-phase power is unavailable.

7. **Standardized Frame Size (145TC)** The 145 frame size is common in industrial applications, meaning replacement parts and accessories are widely available.

8. **Explosion-Proof or Hazardous Location Compliance (if applicable)** While not explicitly stated, Baldor-Boston motors are often designed for compliance with NEMA or IEC standards, including hazardous location ratings if needed.

9. **Low Maintenance Requirements** High-quality bearings and sealed designs reduce the need for frequent upkeep, lowering downtime and maintenance costs.

10. **Compatibility with Variable Frequency Drives (VFDs)** Many Baldor-Boston motors are VFD-compatible, allowing for speed control and energy savings in applications where variable speed is beneficial.

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1. **Single-Phase Limitations** Single-phase motors require additional components (such as a capacitor start or run setup) to start properly, which can add complexity and cost compared to three-phase motors. They also produce torque ripple, which may affect performance in certain applications.

2. **Potential Higher Initial Cost** While not always the case, NEMA Premium or high-quality motors may have a higher upfront cost compared to standard efficiency or generic brands.

3. **Size and Weight** The 145 frame size is relatively large for a 1.5 HP motor, which may limit installation options in space-constrained environments.

4. **Dependence on Electrical System Compatibility** The dual-voltage capability is beneficial, but if the facility s voltage is outside the specified range (e.g., 208V vs. 230V), performance or compatibility issues may arise.

5. **Lead Times for Replacement Parts** As with many industrial components, finding replacement parts or motors may take time, especially if the model is no longer in active production.

6. **Potential for Overkill in Low-Demand Applications** If the motor is significantly more powerful than required for the application, it may run inefficiently or waste energy.

7. **No Built-In Protection Features (unless specified)** Unless this motor includes built-in overload protection or thermal safeguards, additional protective devices (such as circuit breakers or thermal relays) may be necessary.

8. **Limited Customization** Unlike some OEM or custom motors, this is a standard model with limited options for tailoring specifications (e.g., shaft length, mounting style, or enclosure type).

9. **Potential for Higher Noise or Vibration** Single-phase motors can sometimes produce more noise or vibration compared to three-phase motors, depending on the load and application.

10. **Resale or Trade-In Value** Industrial motors, especially older or standard models, may not hold significant resale value, making it less attractive for applications where depreciation is a concern.

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### **Conclusion**

The **Baldor-Boston 35N91-1274 JRTF-B AC Motor (1.5 HP, 1725 RPM, 115V/208-230V, 145TC)** is a well-engineered, reliable motor suitable for a wide range of industrial, commercial, or light-duty applications. Its **NEMA Premium efficiency, dual-voltage capability, and single-phase design** make it a practical choice for facilities where three-phase power is unavailable or where energy efficiency is a priority.

However, its **single-phase limitations (startup requirements, torque ripple), potential higher cost, and size constraints** may make it less ideal for high-torque or three-phase applications. If the application demands **higher starting torque, smoother operation, or three-phase compatibility**, a three-phase motor may be a better fit.

For applications where **space, voltage compatibility, and efficiency** are key factors, this motor is a strong contender. Always verify the **specific load requirements, electrical system compatibility, and long-term maintenance needs** before purchasing.

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### **Recommendation**

- You need a **reliable, energy-efficient single-phase motor** for applications like fans, pumps, or conveyors.

- Your facility operates on **single-phase power** or has a **dual-voltage system** (115V/208-230V).

- You prioritize **long-term durability and low maintenance** from a trusted brand.

- The **1725 RPM speed** matches your application s requirements.

- Your application requires **high starting torque or three-phase operation** (e.g., heavy-duty machinery, compressors).

- You need **customized mounting or shaft options** not available in this standard model.

- Cost is a major concern, and a **standard efficiency or generic motor** would suffice.

- The motor s **size or weight** is a limiting factor in your installation.

- Confirm the motor s **exact efficiency rating** (NEMA Premium vs. standard) to ensure energy savings.

- Verify **compatibility with your electrical system** (voltage, phase, and amperage requirements).

- Check if **additional components** (e.g., capacitor start/run kit) are needed for single-phase startup.

- Consult with a **mechanical or electrical engineer** to ensure the motor meets your load requirements.

**Final Verdict:** This motor is a **solid, high-quality choice** for many single-phase applications, but careful consideration of your specific needs will determine whether it is the best fit. If alternatives like three-phase motors or different frame sizes are viable, compare them thoroughly before deciding.

Details:

Ask our experts. In Good Used Condition, Removed from a Working Environment. Rating: Cont. Insulation Class: B.

Amps: 16/8.4-8. Items in Lot1. Country of Manufactures. Condition Used.

Part Number35N91-1274. And the cost of return shipping. voltage : 115/208-230V. Enclosure: TEFC.

Phase: Single.

part #: 35n911274 prices

• $190.00-$488.80

specifications oelemot:

• brand: Baldor Boston Gear
• mpn: 35n91-1274
• model: Jrtf-b
• part type: Ac 5hp Motor
• power phase: Single
• seer rating: Cont.
• service factor: 1.15

returns oelemot:

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

shipping oelemot:

• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Standard Overnight
• transit: 2-4 Days
• type: Calculated
• carrier: FedEx
• class: Standard, Expedited, One-day
• cost: $176.25

offer oelemot:

• quantity: 1
• availability: In Stock
• started: April 13, 2026
• sold: 0
• options: Ship-to-home
• best offers: True

seller oelemot:

• city: Millersburg, Indiana
• rating: 99.9%
• # reviews: 19150

general oelemot:

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

payments oelemot:

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

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