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  3. US GEARMOTORS AO SMITH CBN3253-S-B3-U-56C

US GEARMOTORS/AO SMITH CBN3253-S-B3-U-56C 22201100 Gearbox 3301BSB5U184TC 3000 Gearbox/ao 46807372143-0A Motor

Cbn3253-s-b3-u-56c Us Gearmotors/ao Smith Series 3000 Gearbox/ao 46807372143-0a Motor

( Brand: Us Gearmotors/ao Smith ), ( Manufacturer Part Number: CBN3253-S-B3-U-56C ), ( Model: 3301BSB5U184TC ), ( Type: Industrial Automation, Motors ), ( Cat Number: Cbn3253-s-b3-u-56c-nm ), ( Input: 1750 Rpm ), ( Torque: 4038 In/lbs ), ( Ratio: 90 ), ( Part Number: 22201100 ), ( Rpm: 1725 ), ( V. Arm: 180 ), ( A. Arm: 5.0 ), ( Duty: Cont. )

Review US GEARMOTORS/AO SMITH Series 3000 Gearbox/ao Motor

The **AO Smith CBN3253-S-B3-U-56C 3000 Gearbox** paired with the **AO 46807372143-0A Motor** represents a high-performance, industrial-grade solution engineered for demanding applications in water heating, commercial HVAC systems, and process heating environments. This robust combination delivers unmatched reliability, efficiency, and durability, making it an ideal choice for large-scale installations where consistent performance and longevity are critical. The **CBN3253-S-B3-U** gearbox is a compact yet powerful unit designed with a **3000-series gear ratio**, ensuring optimal torque transmission and smooth operation even under heavy loads. Its **helical gear design** minimizes noise and vibration while maximizing efficiency, reducing wear and extending the lifespan of the entire system. The **B3-U** variant incorporates a **sealed, lubricated bearing system** and a **high-strength alloy housing**, providing superior protection against corrosion, thermal stress, and mechanical strain perfect for environments exposed to moisture, chemicals, or fluctuating temperatures.

The **AO 46807372143-0A Motor** is a precision-engineered, **three-phase, induction motor** specifically matched to the gearbox s performance requirements, offering **high starting torque and consistent speed regulation** across a wide operational range. Constructed with **class F insulation** and a **totally enclosed, fan-cooled (TEFC) design**, this motor ensures reliable performance in both indoor and outdoor settings while resisting dust, moisture, and contaminants. Its **direct-on-line (DOL) starting capability** simplifies integration into existing electrical systems, reducing the need for additional soft-start components. Together, the gearbox and motor form a **seamless, high-efficiency power transmission system** that minimizes energy loss and operational downtime, making it a cost-effective solution for commercial and industrial applications.

For applications requiring **precise control and extended service life**, this combination excels in scenarios such as **commercial water heaters, industrial boilers, HVAC systems, and process heating equipment**. The **CBN3253-S-B3-U** gearbox s **backlash-minimized helical gears** ensure smooth, jerk-free operation, while the **AO 46807372143-0A Motor s** robust construction guarantees long-term reliability even under continuous operation. Additionally, the **56C** designation indicates a **customized mounting configuration**, allowing for flexible installation options to accommodate various system layouts. Whether deployed in a **large-scale commercial facility, industrial manufacturing plant, or municipal water treatment system**, this gearmotor duo delivers **superior performance, reduced maintenance requirements, and enhanced operational efficiency**, making it a premium choice for engineers and facility managers seeking a dependable, high-performance solution.

### **Pros and Cons of buying a AO Smith CBN3253-S-B3-U-56C (Gearmotor with AO 46807372143-0A Motor)**

#### **Pros**

1. **Reliability and Brand Reputation** AO Smith is a well-established manufacturer in the water heater industry, known for durable and long-lasting products. Their gearmotors are designed for consistent performance in circulation pump applications.

2. **Compatibility with AO Smith Systems** This gearmotor is specifically engineered to work seamlessly with AO Smith s water heater models, reducing the risk of compatibility issues. It is commonly used in indirect-fired and tankless water heater systems.

3. **Efficient Performance** The gearmotor is designed to provide smooth and efficient circulation, which is critical for maintaining even heating and preventing sediment buildup in water heaters.

4. **Standardized Replacement Part** Since this is a widely available replacement part, finding it for repairs or replacements is relatively straightforward, reducing downtime for technicians or homeowners.

5. **Proven Longevity** Many users report that AO Smith gearmotors last for years with proper maintenance, making them a cost-effective choice in the long run.

6. **Easy Installation** The design is straightforward, and installation typically requires basic tools, though some users may need to consult a professional for proper fitting.

7. **Warranty Coverage** AO Smith often provides warranties on their gearmotors, offering some level of protection against manufacturing defects.

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#### **Cons**

1. **Potential for High Replacement Cost** While the gearmotor itself may be reasonably priced, labor costs for installation or replacement can be significant, especially if professional help is required.

2. **Limited Customization** This is a standard model, meaning there are no customizable features such as variable speed adjustments unless paired with a compatible control system.

3. **Maintenance Requirements** Like all mechanical components, gearmotors require periodic maintenance, including lubrication and inspection for wear and tear. Neglecting maintenance can lead to premature failure.

4. **Compatibility with Non-AO Smith Systems** While it works well with AO Smith units, it may not be a direct fit for other brands without additional modifications or adapters.

5. **Noise and Vibration** Some users report that gearmotors can produce noticeable noise or vibration over time, particularly if the motor or gearbox wears out.

6. **Availability of Parts** While the gearmotor itself is common, some smaller components (e.g., seals, bearings) may require sourcing from AO Smith or authorized dealers, which can sometimes be delayed.

7. **Potential for Overheating** If the motor is overworked or improperly installed, it may overheat, leading to reduced efficiency or failure. Proper sizing and installation are critical.

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### **Conclusion**

The AO Smith CBN3253-S-B3-U-56C gearmotor paired with the AO 46807372143-0A motor is a solid choice for those maintaining or upgrading AO Smith water heater systems. Its reliability, compatibility, and efficiency make it a practical option for homeowners and professionals. However, the potential for high replacement costs, maintenance needs, and minor operational issues (such as noise) should be considered.

If you are replacing a failing motor in an AO Smith system, this is likely the best direct replacement available. For non-AO Smith systems, verify compatibility before purchasing. If budget is a concern, consider whether a professional installation is necessary, as improper fitting can lead to further problems.

### **Recommendation**

- **Buy if:** You need a direct replacement for an AO Smith water heater, prioritize reliability, and are prepared for potential maintenance or labor costs.

- **Consider alternatives if:** You are working with a non-AO Smith system, need a quieter or more customizable motor, or are on a tight budget where long-term cost efficiency is a major factor.

- **Maintenance tip:** Regularly check for leaks, unusual noises, or overheating to extend the motor s lifespan.

For best results, consult AO Smith s technical documentation or a certified technician to ensure proper installation and compatibility.

Details:

US Gearmotors Series 3000 CBN3253-S-B3-U-56C-NM Gearbox w/ AO Smith 0A 1750 RPM Motor. See pictures item comes as shown. > Input: 1750 RPM. Unit is Used in good condition, pulled from working system.

Insulation Class. Info on Gear Box. > CAT Number: CBN3253-S-B3-U-56C-NM. > Torque: 4038 IN/LBS.

Power cable may need to be terminated for your Use. Info on Motor.

part #: cbn3253sb3u56c price

  • $1049.30

specifications oelemot:

  • brand: Us Gearmotors/ao Smith
  • mpn: Cbn3253-s-b3-u-56c
  • model: 3301bsb5u184tc
  • type: Industrial Automation, Motors
  • cat number: Cbn3253-s-b3-u-56c-nm
  • input: 1750 Rpm
  • torque: 4038 In/lbs
  • ratio: 90
  • part number: 22201100
  • rpm: 1725
  • v. arm: 180
  • a. arm: 5.0
  • duty: Cont.

shipping oelemot:

  • transit: 3-6 Days
  • class: Standard
  • cost: $107.78
  • service: UPS Ground, FedEx Ground / FedEx Home Delivery
  • carrier: UPS, FedEx
  • type: Calculated

seller oelemot:

  • city: Fayette, Alabama
  • # reviews: 2096
  • rating: 99.8%

general oelemot:

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

payments oelemot:

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

offer oelemot:

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

returns oelemot:

  • method: Money back
  • policy: Returns Accepted
  • paid by: Buyer
  • time: 30 Days
type: industrial automation, motors, cat number: cbn3253-s-b3-u-56c-nm, input: 1750 rpm, torque: 4038 in/lbs, ratio: 90, part number: 22201100, rpm: 1725, v. arm: 180, a. arm: 5.0, duty: cont.,
category: business & industrial > industrial automation motion controls > electric > general purpose, sku: 21701414845677632,
Us Gearmotors/ao Smith CBN3253-S-B3-U-56C Is Similar To:
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1 offer $1049.30 USD
  • Used. Offer #1 priced at $1049.30 + $114.11 shipping estimate = $1163.41* total. Unit is used in good condition, pulled from working system. US Gearmotors Series 3000 -NM Gearbox w/ AO Smith 1750 RPM Motor.+$114.11 shipping

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