RBI 44-4152 Bearing Nos 6004RS 6004-2RS

( Brand: Rbi ), ( Manufacturer Part Number: 44-4152 ), ( Part Type: Bearing )

Review RBI Bearing Nos

The **RBI 44-4152 6004RS and 6004-2RS bearings** are precision-engineered deep groove ball bearings designed for high-performance applications requiring reliable, low-friction rotational movement. These bearings belong to the **6000 series**, a widely recognized standard in the industry, and are specifically tailored for use in light to medium-duty applications where compact size, smooth operation, and durability are essential. The **6004RS model** features a **6mm inner diameter, 19mm outer diameter, and a 6mm width**, making it ideal for small machinery, automotive components, electric motors, and industrial equipment where space constraints demand efficient bearing solutions. The **RS designation** indicates that this bearing is equipped with a **shielded design** on one side, providing protection against dust, debris, and moisture while maintaining easy installation and removal without the need for grease during assembly. This shielding enhances the bearing s longevity in environments where contamination is a concern, such as in automotive wheel hubs, small gearboxes, or household appliances.

The **6004-2RS variant**, on the other hand, includes **sealed shields on both sides**, offering even greater protection against ingress of foreign particles and retention of lubricant. This dual-shield configuration is particularly advantageous in applications where the bearing operates in harsh conditions, such as in outdoor machinery, agricultural equipment, or consumer electronics where reliability under varying temperatures and exposure is critical. Both bearings are manufactured to strict tolerances, ensuring minimal axial and radial play, which translates to reduced vibration, extended bearing life, and improved overall system efficiency. Their **steel construction**, typically made from high-quality chrome steel, provides excellent wear resistance and fatigue strength, making them suitable for continuous operation under moderate loads.

The **6004RS and 6004-2RS** bearings are also designed with **precisely ground raceways and hardened steel balls**, which optimize load distribution and minimize friction, thereby reducing energy loss and heat generation. These bearings are commonly used in applications such as **electric motors, pumps, compressors, small gear trains, and automotive components like alternators and power steering systems**. Their compact form factor allows for integration into tight spaces without compromising performance, while their robust construction ensures they can withstand repeated stress cycles without degradation. Additionally, the bearings are often supplied with a **light coat of lubricant** during manufacturing, which can be supplemented or replaced with a more durable grease or oil depending on the specific operational requirements. Whether in industrial automation, consumer goods, or automotive systems, these bearings deliver a balance of precision, durability, and ease of maintenance, making them a versatile choice for engineers and designers seeking reliable rotational solutions.

### **Pros and Cons of Buying RBIs 44-4152 and 6004RS (6004-2RS) Bearings**

1. **High Load Capacity** Both the **44-4152** (deep groove ball bearing) and **6004RS/6004-2RS** (open/closed angular contact ball bearing) are designed to handle radial and axial loads effectively. The **6004RS** (sealed) offers better protection against contaminants, while the **6004-2RS** (double-sealed) provides even greater durability in harsh environments.

2. **Precision Engineering** RBIs (Raj Bearing Industries) is a reputable manufacturer known for producing bearings with tight tolerances, ensuring smooth operation in machinery like pumps, conveyors, and automotive applications.

3. **Cost-Effective Alternative to Brand Names** Compared to premium brands like SKF or NSK, RBI bearings offer similar performance at a lower cost, making them a practical choice for budget-conscious buyers.

4. **Wide Availability** These bearings are commonly stocked in industrial supply chains, reducing lead times for replacements.

5. **Compatibility with Standard Mounting** Both bearing types fit standard shaft and housing dimensions, making them easy to integrate into existing systems without modifications.

6. **Durability in Moderate Conditions** The **6004RS** (sealed) is suitable for environments with light to moderate contamination, while the **6004-2RS** (double-sealed) extends service life in slightly dirtier conditions.

- Small electric motors

- Conveyor belts

- Agricultural machinery

- Light-duty automotive components (e.g., wheel hubs in some vehicles)

- Small pumps and compressors

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1. **Limited Lifespan in Harsh Conditions** Unlike premium bearings, RBI bearings may wear faster in extreme temperatures, high-speed applications, or highly contaminated environments without proper lubrication.

2. **Potential for Lower Precision Over Time** While initially precise, prolonged use without maintenance can lead to increased play and reduced efficiency compared to high-end brands.

3. **Lubrication Dependency** If not properly lubricated, these bearings may generate more heat and noise, leading to premature failure.

4. **Limited Warranty Compared to Premium Brands** RBI typically offers standard warranties (often 1 2 years), whereas brands like SKF or NSK may provide extended warranties or better customer support.

5. **Risk of Counterfeit or Low-Quality Alternatives** If purchasing from unverified sellers, there is a chance of receiving substandard or counterfeit bearings that fail quickly.

6. **Not Suitable for High-Speed or Heavy Loads** The **6004 series** is not designed for extreme speeds or heavy axial loads. For such applications, larger or specialized bearings (e.g., **6204, 6304, or tapered roller bearings**) may be required.

7. **Potential for Higher Maintenance Needs** Due to their construction, sealed bearings (like the **6004RS**) may require occasional cleaning and re-lubrication if used in dirty environments.

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The **RBI 44-4152** and **6004RS/6004-2RS** bearings are **cost-effective, reliable choices for light to medium-duty applications** where precision and longevity are not critical. They excel in **moderate-speed, low-to-moderate-load environments** and are a **practical alternative to expensive brand-name bearings** for general industrial, automotive, and machinery use.

However, if the application involves **high speeds, extreme loads, or harsh conditions**, investing in **higher-quality bearings (e.g., SKF, NSK, or Timken)** may be justified to ensure **longer lifespan, reduced maintenance, and better overall performance**.

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- You need a **budget-friendly solution** for standard applications.

- The environment is **moderately clean** (or sealed versions like **6004RS/6004-2RS** are used).

- You are replacing a failed bearing in an **existing system** where compatibility is already confirmed.

- You plan to **monitor and maintain** the bearings regularly (lubrication, cleaning).

- The application involves **high speeds, heavy axial loads, or extreme temperatures**.

- The environment is **highly contaminated** (e.g., dust, chemicals, or moisture without proper sealing).

- You require **extended warranties or premium reliability** (e.g., in critical industrial or automotive systems).

- You are unsure of the **authenticity of the product** (purchase from **authorized distributors** to avoid counterfeits).

For **most general-purpose uses**, the **RBI 6004RS (sealed)** is a **solid choice** due to its balance of cost and protection. If **long-term reliability is a priority**, consider **upgrading to a reputable brand** for applications where failure could cause downtime or safety risks. Always **verify the source** and ensure proper installation and lubrication for optimal performance.

Details:

Bearing is new and in excellent condition, original packaging. Items are shipped using USPS, UPS, and FedEx. If the original package is included it may show signs of wear. Pictures: Thumbnails.

RBI 44-4152, 6004RS, 6004-2RS Bearing NOS. All parts are in stock and ready to ship.

part #: 444152 prices

• $8.99-$17.50

specifications bearingmotorcycleiz:

• brand: Rbi
• mpn: 44-4152
• part type: Bearing

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• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings
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• started: February 22, 2026

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