WESTINGHOUSE 4K941 Electric Motor Rpm Frame 1/3HP 3450 115-V D48

( Brand: Westinghouse ), ( Manufacturer Part Number: 4K941 ), ( Model: WESTINGHOUSE 4K941 ), ( Part Type: Motor Frame ), ( Rated Load: Hp )

Review WESTINGHOUSE Electric Motor 1/3hp Rpm 115 D48 Frame

The **Westinghouse 4K941 Electric Motor** is a high-performance, single-phase, induction motor designed for reliability, efficiency, and versatility in a wide range of industrial and commercial applications. Engineered with precision, this **1/3 horsepower (0.25 kW) motor** delivers a consistent output of **3450 revolutions per minute (RPM)**, making it ideal for applications requiring moderate speed and steady torque, such as small conveyors, pumps, compressors, fans, and light-duty machinery. Built to the **NEMA D-frame standard (D48)**, this motor features a robust, compact design that ensures easy integration into existing systems while maintaining optimal mechanical balance and operational stability. The **115-volt single-phase** power rating ensures compatibility with standard household or light-commercial electrical setups, simplifying installation and reducing the need for complex wiring or additional equipment.

Constructed with durable materials, the Westinghouse 4K941 motor incorporates a **high-quality cast-iron endbell and housing**, providing superior protection against wear, corrosion, and thermal stress. Its **ball-bearing assembly** is precision-engineered for smooth operation, minimal friction, and extended service life, even under continuous or intermittent load conditions. The motor s **efficient winding design** and optimized magnetic core contribute to reduced energy consumption and lower operational costs, making it an economical choice for applications where performance and cost-effectiveness are critical. Additionally, the **NEMA Premium efficiency rating** ensures that this motor meets or exceeds industry standards for energy savings, further enhancing its appeal for environmentally conscious and cost-conscious users.

Safety and reliability are paramount in the design of the Westinghouse 4K941, featuring **thermal overload protection** to prevent overheating and prolong motor lifespan. The **sleeve-bearing option** (available in some configurations) offers low-maintenance operation, reducing the need for frequent lubrication and extending intervals between servicing. With a **continuous-duty rating**, this motor is well-suited for applications requiring sustained performance without the risk of overheating or premature failure. Its **compact D48 frame** allows for flexible mounting options, including foot, flange, or direct coupling, making it adaptable to various mechanical setups without compromising performance.

Whether used in HVAC systems, small-scale manufacturing, agricultural equipment, or commercial appliances, the Westinghouse 4K941 motor delivers dependable power with minimal maintenance. Its **quiet operation**, smooth acceleration, and robust construction make it a trusted choice for engineers, technicians, and end-users seeking a balance of performance, durability, and affordability. Backed by Westinghouse s reputation for quality and innovation, this motor is a reliable workhorse for applications where efficiency, longevity, and ease of use are essential.

**Pros and Cons of buying a Westinghouse 4K941 Electric Motor (1/3 HP, 3450 RPM, 115V, D48 Frame)**

1. **Reliable Brand Reputation** Westinghouse is a well-established manufacturer known for producing durable and dependable electric motors. Their motors are widely used in industrial, commercial, and residential applications, which suggests a track record of quality and longevity.

2. **Standardized Frame Size (D48)** The D48 frame is a common NEMA (National Electrical Manufacturers Association) size, making it easier to find compatible mounts, couplings, belts, and replacement parts. This standardization simplifies maintenance and upgrades.

3. **High RPM (3450 RPM)** The motor s speed is well-suited for applications requiring fast rotation, such as fans, blowers, pumps, or small machinery where higher RPM is beneficial for efficiency or performance.

4. **Low Horsepower (1/3 HP)** At 1/3 horsepower, this motor is ideal for light-duty tasks, reducing energy consumption and operational costs. It is a practical choice for smaller systems where excessive power is unnecessary.

5. **115V Voltage Rating** The 115V rating makes it compatible with standard household or light-commercial electrical systems in North America, avoiding the need for specialized wiring or transformers.

6. **Compact and Lightweight** As a 1/3 HP motor, it is relatively small and easy to install in tight spaces, making it versatile for various applications without requiring significant structural modifications.

7. **Potential for Long Lifespan** With proper maintenance (e.g., lubrication, cleaning, and regular inspections), Westinghouse motors are known to last for many years, reducing the need for frequent replacements.

8. **Cost-Effective for Light Loads** For applications where the motor operates under its rated load, it can be an economical choice compared to larger, more expensive motors.

---

1. **Limited Power for Heavy-Duty Tasks** At only 1/3 HP, this motor is not suitable for demanding applications that require higher torque or continuous heavy loads. Overloading it can lead to overheating, reduced lifespan, or failure.

2. **Potential for Overheating Under Heavy Loads** If the motor is used in applications where it operates near or above its capacity for extended periods, it may overheat, especially in poorly ventilated environments. This could shorten its lifespan or cause damage.

3. **No Built-In Protection Features** Many modern motors include overload protection, thermal cutouts, or electronic controls to prevent damage from faults. The 4K941 appears to be a basic design, which may lack such safeguards, requiring additional protective measures (e.g., fuses, relays) in the installation.

4. **Maintenance Requirements** Like all electric motors, this one will require periodic maintenance, such as bearing lubrication, brush replacement (if it s a brushed motor), and cleaning of vents to ensure optimal performance and cooling.

5. **Compatibility Issues with Non-Standard Systems** While the D48 frame is common, some older or non-standard machinery may require custom mounts or adapters. Ensure the motor s shaft size, mounting holes, and electrical connections align with your application.

6. **Limited Warranty or Support** Westinghouse motors typically come with a standard warranty (often 1 2 years), but extended warranties or local support may vary by region. If you need immediate assistance, availability could be a concern depending on your location.

7. **Noise and Vibration** Some users report that smaller motors, especially when operating near their maximum capacity, can produce more noise or vibration. This may be a consideration for applications requiring quiet operation.

8. **Potential for Counterfeit or Low-Quality Replacements** If purchasing from third-party sellers (e.g., online marketplaces), there is a risk of receiving counterfeit or refurbished motors that may not meet Westinghouse s standards. Buying directly from authorized dealers reduces this risk.

---

The Westinghouse 4K941 (1/3 HP, 3450 RPM, 115V, D48 frame) is a **practical and reliable choice for light-duty applications** where a small, efficient motor is needed. Its standardized frame, compatibility with standard electrical systems, and reputation for durability make it a solid option for fans, blowers, small pumps, or other low-to-medium-load machinery.

However, it is **not suitable for heavy-duty or continuous high-load applications**, as its low horsepower rating could lead to overheating or premature failure. If you plan to use it in an environment with poor ventilation or irregular maintenance, additional protective measures (e.g., thermal overload relays) should be considered.

For most **residential, light-commercial, or hobbyist applications**, this motor offers a good balance of affordability, ease of use, and reliability. If you require higher power, torque, or specialized features (e.g., variable speed control), a larger or more advanced motor may be necessary.

---

- You need a small, efficient motor for low-to-medium-duty tasks (e.g., fans, small pumps, conveyors).

- You have a standard 115V electrical system and can ensure proper ventilation and maintenance.

- You prefer a well-known brand with a proven track record for durability.

- You can source it from an authorized dealer to avoid counterfeit products.

- Your application requires high torque, continuous heavy loads, or frequent starts/stops.

- You need advanced features like variable speed control or built-in protection.

- You cannot guarantee proper maintenance or cooling for the motor.

- You are unsure about the compatibility of the D48 frame with your existing setup.

**Final Verdict:** The Westinghouse 4K941 is a **sound investment for its intended use**, provided the application aligns with its specifications. For heavier or more complex tasks, consider upgrading to a higher horsepower motor or one with additional protective features. Always verify the motor s compatibility with your system before purchase.

Details:

The condition is excellent.

part #: 4k941 prices

• $89.85-$134.00

specifications oelemot:

• brand: Westinghouse
• mpn: 4k941
• model: Westinghouse 4k941
• part type: Motor Frame
• rated load: Hp

shipping oelemot:

• transit: 3-6 Days
• service: Economy
• class: Economy
• cost: $29.85
• type: Fixed

returns oelemot:

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

payments oelemot:

general oelemot:

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

seller oelemot:

• city: Rexburg, Idaho
• # reviews: 612
• rating: 100.0%

offer oelemot:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: February 5, 2026

Westinghouse 4K941 Is Similar To:

• 05-5h6-sbdp-mkb Westinghouse Sbdp Hp Rpm Volt (38.5% similar) ...(November 19th, 2018)
• 11770930 Westinghouse Motor Amp Rpm Fram Continuous (50.4% similar) This is what the tag says dont know if it readable in photos. 9 amperes phase 1/6 0 cycles rpm 1725 hours continuous codes Westinghouse electric corporation open trial deg. A-c motor 56Z fram part hp 115V...(March 16th, 2018)
• 1347734-d Westinghouse Vintage Dual Shaft Electric Motor Hp Rpm Phase Cy (54.4% similar) It has 2 shafts long each 1 diameter flat sided. Has been repainted. This offer for the vintage used motor with mounting bracket and clips as pictured. Has some wear and tear paint rust but runs smooth strong...(May 10th, 2018)
• 150 Hp 1160 Rpm Westinghouse (26.1% similar) ...(March 30th, 2017)
• 1635015-c Westinghouse Used Ac Motor (42% similar) For sale a used clean quiet running motor,good condition as can be seen in photos,comes with variable speed pulley, reverse rotation,looks like 1 motor bolt has been replaced photo brand Westinghouse type FHA rpm 1725 hp 4 voltage ac 120 c thanks looking variety of other listings...(September 14th, 2017)
• 311p129a Westinghouse Cat Hp Ac Motor (41.6% similar) 3/1 725RPM price is for 1 I have 2 available. New Westinghouse cat 311P129A 1/2 hp ac motor 460VAC 60 Hz...(November 20th, 2018)
• 316p463 Westinghouse Ac Motor Ser Type Fz Fast Shipping Warranty (42.2% similar) For next day air or faster shipping please. Standard shipping is USPS priority mail or ups ground...(May 21st, 2018)
• 316p521-c Westinghouse Electric Motor Hp Rpm Frame Single Phase Shaft (58.6% similar) Westinghouse electric motor 1/4 hp 1725 rpm B48 frame single phase runs quiet 2 shaft...(May 20th, 2018)
• 316p824 Westinhouse Westinghouse Ac Motor Hp Fan (44.6% similar) It was in its original box when I found it, removed for the photo shoot. The grainier P/N is 5K215. This motor was purchase for a project that eventually went south and so it left behind. You are buying on one motor, never installed, Westinghouse type FHA P/N 316P824 hp 115V 1-PHASE 1725RPM ...(July 31st, 2018)
• 317p235 Westinghouse Hp Frame Rpm Fh Type Ac Motor (38.6% similar) Works spins. Please see all pics and feel free to with any questions before buying or buying. Estate sale item. Barely used if at all...(July 1st, 2018)
• 3m652 Westinghouse Hp Perm Split Ph Frame Free (43.6% similar) Hp Westinghouse 3M652 perm split cap. 230V pH 1 frame ft 48 free shipping...(June 12th, 2018)