DAYTON 2N991 Phase Induction Motor Rpm Keyed Shaft 208-440V 1170

( Brand: Dayton ), ( Manufacturer Part Number: 2N991 ), ( Part Type: Hp Motor Shaft ), ( Actual Rated Input Voltage: 208 V, 220 V, 440 V ), ( Full Load Amps: 10.2-10.0/5.0 ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60 Hz ), ( Enclosure Type: Opp ), ( Base Rpm: 1170 ), ( Shaft Type: Keyed ), ( Ac Motor Type: Induction/asynchronous ), ( Shaft Diameter: 1.125 In ), ( Mounting Type: Base-mounted ), ( Definite Purpose Motor Type: Definite Purpose ), ( Current Type: Ac ), ( Service Factor: 1.15 ), ( Ac Phase: Three Phase )

Review DAYTON Hp Phase Induction Motor Rpm Keyed Shaft

The **Dayton 2N991 HP Phase Induction Motor**, a robust and versatile workhorse in industrial and commercial applications, delivers reliable performance with its compact yet powerful design. Engineered for efficiency and durability, this **1/2 horsepower (HP) single-phase induction motor** operates seamlessly across a broad voltage range of **208 440 volts**, making it an ideal choice for diverse electrical systems without requiring specialized voltage adjustments. With a consistent **1170 RPM** synchronous speed, it provides a balanced output for applications demanding steady rotational force, such as small conveyors, pumps, compressors, or automated machinery where precision and consistency are critical. The motor s **keyed shaft** ensures secure coupling to driven equipment, preventing slippage and enhancing mechanical integrity, which is particularly advantageous in applications where torque transmission must remain precise and uninterrupted.

Constructed with high-quality materials, the 2N991 is built to withstand the rigors of continuous operation while maintaining energy efficiency. Its **phase-splitter induction design** eliminates the need for external capacitors in most applications, simplifying installation and reducing maintenance overhead. The motor s compact frame and lightweight construction make it easy to integrate into tight spaces, whether in a factory floor, HVAC system, or small-scale industrial setup. Additionally, its **NEMA Premium efficiency rating** ensures optimal power conversion, lowering operational costs by reducing energy consumption without compromising performance. Whether used in residential appliances, light-duty commercial equipment, or small-scale automation, this motor exemplifies reliability, adaptability, and cost-effectiveness, making it a dependable solution for a wide range of mechanical drives.

### **Pros and Cons of buying a Dayton 2N991 HP Phase Induction Motor (208-440V, 1170 RPM, Keyed Shaft)**

1. **Reliable Performance** Dayton is a well-established manufacturer known for producing durable, high-quality motors. This induction motor is designed for consistent operation under standard industrial loads.

2. **Wide Voltage Range (208-440V)** The motor s compatibility with both single-phase (208V) and three-phase (440V) power supplies makes it versatile for different electrical setups without requiring significant modifications.

3. **Standard Industrial RPM (1170 RPM)** The 1170 RPM speed is common in many applications, including conveyors, pumps, and fans, reducing the need for additional gearing or speed reducers.

4. **Keyed Shaft Design** The keyed shaft ensures a secure mechanical connection to driven equipment, preventing slippage and improving torque transmission, which is critical for heavy-duty applications.

5. **Phase Induction Motor Technology** Induction motors are generally robust, low-maintenance, and efficient for continuous operation. They are less prone to failure from electrical issues compared to some other motor types.

6. **Cost-Effective for General Use** While not the most premium motor on the market, it offers a balanced price-to-performance ratio for standard industrial applications where high precision or variable speed is not required.

7. **Easy Installation and Maintenance** The motor s design is straightforward, with common mounting options (e.g., foot or flange mounts) and standard electrical connections, making installation and servicing accessible for most technicians.

8. **Good for Continuous Duty** Suitable for applications requiring prolonged operation, such as HVAC systems, water pumps, or material handling equipment, where reliability is key.

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1. **Fixed Speed Operation** Unlike variable frequency drive (VFD)-compatible motors, this motor operates at a fixed speed (1170 RPM). If speed control is required, an additional VFD would be needed, adding cost and complexity.

2. **No Built-in Overload Protection** The motor lacks integrated overload protection (such as thermal cutouts), meaning external overload relays or circuit breakers must be installed to prevent damage from excessive current or stalling.

3. **Standard Efficiency** While efficient for its class, it may not meet the energy-saving standards of premium "Premium Efficiency" or "Super Premium" motors, which could lead to higher operational costs over time in energy-intensive applications.

4. **Limited Environmental Ratings** Unless specified otherwise, this motor may not be rated for harsh environments (e.g., extreme temperatures, high humidity, or explosive atmospheres). Additional sealing or protection (e.g., NEMA 4X) may be required for such conditions.

5. **No Brushless or High-Torque Options** If the application demands high starting torque or brushless operation (e.g., in some automation or precision equipment), this motor may not be the best fit without modifications.

6. **Potential for Higher Noise/Vibration** Like many standard induction motors, it may produce more noise and vibration compared to premium or specially designed motors, which could be a concern in noise-sensitive environments.

7. **Dependence on Power Quality** Induction motors are sensitive to voltage fluctuations, harmonics, or unbalanced phases. Poor power quality can reduce efficiency, increase wear, or lead to premature failure.

8. **Limited Customization** The motor s specifications (e.g., shaft length, mounting style, or enclosure) are fixed. If your application requires non-standard features, additional adapters or modifications may be necessary.

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The **Dayton 2N991 HP Phase Induction Motor** is a solid, no-frills choice for **general-purpose industrial applications** where reliability, simplicity, and cost-effectiveness are prioritized over advanced features. It excels in **standard conveyors, pumps, fans, or machinery** that require a dependable, fixed-speed motor without complex controls. However, it may fall short for applications needing **speed variability, high torque, or specialized environmental protection**, in which case a more advanced motor (e.g., VFD-compatible, premium efficiency, or explosion-proof) would be preferable.

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- You need a **budget-friendly, reliable motor** for basic industrial tasks.

- Your application requires **fixed-speed operation** (e.g., continuous conveyor belts, water pumps, or HVAC components).

- You have **stable power supply conditions** and can install proper overload protection.

- The **keyed shaft and standard RPM** align with your mechanical setup.

- You require **speed control** (invest in a VFD-compatible motor).

- Your environment is **harsh** (e.g., corrosive, high-dust, or explosive) without additional protection.

- You need **high efficiency or energy savings** (look for "Premium Efficiency" motors).

- The motor s **noise or vibration levels** are unacceptable (consider premium or low-vibration models).

- Your load demands **high starting torque** (a torque-rated motor may be better).

**Final Verdict:** For most **standard, cost-conscious industrial uses**, this motor is a **practical and dependable choice**. However, always verify compatibility with your specific application and power infrastructure before purchasing. If in doubt, consult an electrician or motor specialist to ensure optimal performance and longevity.

Details:

Dayton 2N991 3 HP Phase Induction Motor 208-440V 1170 RPM Keyed Shaft.

part #: 2n991 prices

• $300.00-$2800.00

specifications momaequ:

• brand: Dayton
• mpn: 2n991
• part type: Hp Motor Shaft
• actual rated input voltage: 208 V, 220 V, 440 V
• full load amps: 10.2-10.0/5.0
• rated load: Hp
• ac frequency rating: 60 Hz
• enclosure type: Opp
• base rpm: 1170
• shaft type: Keyed
• ac motor type: Induction/asynchronous
• shaft diameter: 1.125 In
• mounting type: Base-mounted
• definite purpose motor type: Definite Purpose
• current type: Ac
• service factor: 1.15
• ac phase: Three Phase

payments momaequ:

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

seller momaequ:

• rating: 100.0%
• city: Manassas, Virginia
• # reviews: 331

general momaequ:

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

returns momaequ:

• policy: No Returns

shipping momaequ:

• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage
• cost: $66.56
• transit: 5-12 Days
• class: Standard

offer momaequ:

• best offers: True
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: April 24, 2026

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