WPS 904165 Bearing Nos 6206-2RS

( Brand: Wps ), ( Manufacturer Part Number: 904165 ), ( Part Type: Bearing )

Review WPS Bearing Nos

The **NSK 904165 (6206-2RS)** is a high-performance deep groove ball bearing designed for robust and reliable operation in a wide range of industrial applications. This bearing belongs to the **6200 series**, which is one of the most widely used bearing types globally, known for its versatility and efficiency in supporting radial loads while accommodating moderate axial loads in both directions. The **6206** designation indicates a bore size of **30 mm (1.181 inches)**, making it suitable for medium-duty machinery where space constraints and load requirements demand a balance between compactness and durability. The **2RS** suffix denotes a **double-row shielded design**, featuring two metal shields on either side of the bearing s inner and outer rings. These shields provide effective protection against contaminants such as dust, dirt, and moisture, extending the bearing s operational life in environments where lubrication maintenance is infrequent or impractical. The shields also help retain lubricant within the bearing, reducing the need for frequent relubrication while minimizing wear and tear caused by external debris.

Constructed with precision-engineered components, the **NSK 904165** incorporates high-quality **chromium steel** for both the inner and outer rings, ensuring exceptional hardness and resistance to deformation under heavy loads. The **deep groove ball design** allows for smooth rolling motion of the steel balls, which are precisely spaced within the bearing s cage (retainer), reducing friction and heat generation during operation. The **cage**, typically made from pressed steel or polymer materials, maintains optimal ball spacing to prevent ball-to-ball contact, thereby enhancing efficiency and longevity. This bearing is particularly well-suited for applications requiring **high-speed performance**, such as conveyor systems, agricultural machinery, automotive components (e.g., wheel hubs, transmission shafts), and general industrial equipment like pumps, compressors, and fans. Its compact footprint and robust construction make it an ideal choice for applications where space is limited but reliability is paramount.

The **NSK 904165** is engineered to meet stringent quality standards, including compliance with **ISO 15:2017** and **ABEC-5 tolerances**, which ensure consistent dimensional accuracy and smooth operation. This bearing is also compatible with a variety of lubrication options, including grease or oil, depending on the application s speed, temperature, and environmental conditions. The double-shielded configuration not only protects against contamination but also simplifies installation, as it eliminates the need for additional seals or shields in many cases. However, it is important to note that while the shields provide excellent protection, they are not designed for high-pressure washdown environments or applications where extreme contamination is present, as they may not offer the same level of sealing as rubber or lip seals. For such demanding conditions, alternative bearing configurations, such as those with elastomeric seals, may be recommended.

In summary, the **NSK 904165 (6206-2RS)** is a dependable, high-performance bearing that excels in medium-duty applications requiring durability, efficiency, and protection against environmental contaminants. Its deep groove design, double-shielded construction, and precise manufacturing make it a versatile solution for a broad spectrum of industrial, automotive, and mechanical systems. Whether used in conveyor systems, automotive components, or general machinery, this bearing delivers consistent performance, reduced maintenance requirements, and extended service life, making it a cost-effective choice for engineers and maintenance professionals seeking reliability in their equipment.

### **Analysis of SKF 6206-2RS Bearing (Bearing Number: 904165 6206-2RS)**

The **SKF 6206-2RS** is a deep groove ball bearing with a **6206** series designation, meaning it has an **inner diameter of 30 mm (1.181 in)**, an **outer diameter of 80 mm (3.150 in)**, and a **width of 16 mm (0.629 in)**. The **2RS** suffix indicates it has **two sealed shields** (RS Rubber Shield), providing protection against contaminants and moisture.

Below is a detailed breakdown of its **pros and cons**, followed by a **conclusion and recommendation**.

---

### **Pros of the SKF 6206-2RS Bearing**

1. **Sealed Construction (2RS)**

- The **double rubber shield** prevents dust, dirt, and moisture from entering the bearing, reducing wear and extending service life in **moderate to lightly contaminated environments**.

- Suitable for **general industrial, automotive, and light machinery applications** where occasional exposure to mild contaminants is expected.

2. **High Precision & Quality from SKF**

- SKF is a **well-established bearing manufacturer** known for **consistent quality, durability, and reliability**.

- The bearing is **precisely machined**, ensuring smooth operation and minimal vibration in standard applications.

3. **Standardized Dimensions (ISO 15:2017 Compliant)**

- The **6206 size** is widely available, making replacements easier if needed.

- Fits **standard shaft and housing bore sizes**, reducing compatibility issues in most applications.

4. **Good Load-Carrying Capacity for Its Size**

- Deep groove ball bearings are **versatile** and can handle **radial and light axial loads** effectively.

- Suitable for **fan pulleys, motor shafts, conveyor rollers, and small machinery applications**.

5. **Cost-Effective for General Use**

- While not the **cheapest** bearing on the market, it offers a **good balance between price and performance** for standard applications.

- Long-term reliability can **reduce maintenance costs** compared to cheaper, unsealed bearings that may fail sooner.

6. **Low Maintenance Requirements**

- The **sealed design** means **less frequent lubrication** is needed compared to open bearings.

- Ideal for **automated or hard-to-reach applications** where greasing is difficult.

7. **Wide Availability & Aftermarket Support**

- SKF bearings are **easily found** in stock at most **distributors, online retailers (e.g., McMaster-Carr, Grainger, Amazon), and local bearing shops**.

- Many **compatible alternatives** (e.g., NSK, NTN, FAG) exist if SKF is unavailable.

---

### **Cons of the SKF 6206-2RS Bearing**

1. **Not Suitable for High-Speed or Heavy-Duty Applications**

- While deep groove ball bearings are **versatile**, the **2RS sealed version is not optimized for high speeds** (typically **

- **Heavy radial or axial loads** may cause **premature wear** due to the **rubber shields** restricting heat dissipation.

- For **high-speed or high-load applications**, **open bearings (e.g., 6206-2Z) or specialized bearings (e.g., ceramic ball bearings)** would be better.

2. **Limited Temperature Resistance**

- The **rubber seals** degrade at **high temperatures (typically > 120 C / 248 F)**.

- In **extreme heat environments** (e.g., automotive engines, industrial furnaces), the seals may **harden, crack, or fail**, leading to contamination and bearing damage.

- For **high-temperature applications**, **sealed bearings with synthetic rubber or metal shields (e.g., 6206-2RS1 or 6206-2Z)** may be needed.

3. **Higher Friction Than Open Bearings**

- The **seals add resistance**, leading to **slightly higher torque** compared to open bearings.

- In **precision or energy-efficient applications**, this may be a **minor drawback**.

4. **Not Ideal for Extremely Dirty or Abrasive Environments**

- While the **2RS shields protect against dust and moisture**, they **cannot handle severe contamination** (e.g., metal shavings, abrasive particles).

- In **harsh industrial settings**, **sealed bearings with labyrinth seals or shielded bearings (e.g., 6206-2RS1)** may be required.

5. **Potential for Seal Wear Over Time**

- The **rubber shields can wear out** with **age or improper lubrication**, leading to **contamination and reduced performance**.

- Requires **periodic inspection** in long-term applications.

6. **Higher Cost Than Open Bearings**

- Compared to **open bearings (e.g., 6206-2Z)**, the **2RS version is more expensive** due to the **additional sealing components**.

- If the application **does not require sealing**, an open bearing may be a **more cost-effective choice**.

7. **Limited Axial Load Capacity**

- Deep groove ball bearings are **not ideal for heavy axial loads** unless preloaded.

- For **significant axial forces**, **thrust bearings or tapered roller bearings** would be a better fit.

---

### **Comparison with Alternatives**

**Feature** **SKF 6206-2RS** **SKF 6206-2Z (Open)** **SKF 6206-2RS1 (Metal Shield)** **Ceramic Ball Bearing (e.g., 6206-C3)**

--------------------------- ------------------ ----------------------- ---------------------------------- ------------------------------------------

**Sealing** Double rubber Open Single metal shield Open (but ceramic balls)

**Best For** Moderate dirt Clean environments High temp, some contamination High speed, low friction

**Speed Rating** Moderate High High Very High

**Temp Resistance** Up to 120 C Up to 150 C Up to 150 C Up to 200 C

**Friction** Higher Lower Moderate Very Low

**Cost** Moderate Low Moderate High

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### **Conclusion**

- **General industrial, automotive, and light machinery applications** where **moderate contamination protection** is needed.

- **Applications requiring low maintenance** (e.g., conveyor systems, small motors, fan pulleys).

- **Standard environments** where **high speeds or extreme temperatures are not a concern**.

- **High-speed applications** (consider **open bearings or ceramic ball bearings**).

- **Extreme temperatures** (consider **sealed metal shield bearings or ceramic bearings**).

- **Heavy-duty or high-load applications** (consider **tapered roller or thrust bearings**).

- **Severe contamination** (consider **labyrinth-sealed or shielded bearings**).

---

### **Final Recommendation**

You need a **reliable, sealed bearing** for a **standard application** (e.g., motor shaft, conveyor roller, small machinery).

Your environment has **moderate dust/moisture** but **no extreme conditions**.

You want **minimal maintenance** and **good availability**.

The **operating speed is below 10,000 RPM** and **loads are not excessive**.

**High speeds (>15,000 RPM)** are required **Use an open bearing (6206-2Z) or ceramic bearing.**

**Extreme temperatures (>120 C)** are present **Use a metal-shielded bearing (6206-2RS1) or ceramic bearing.**

**Heavy radial/axial loads** are involved **Use tapered roller or thrust bearings.**

**Severe contamination (metal shavings, abrasives)** is expected **Use a labyrinth-sealed bearing or shielded bearing.**

If cost is a concern, **NSK or NTN 6206-2RS** bearings offer **similar quality at a slightly lower price** without sacrificing reliability.

For **high-performance applications**, **SKF s ceramic ball bearing (e.g., 6206-C3)** or **sealed metal-shielded bearing (6206-2RS1)** may be worth the extra cost.

---

The **SKF 6206-2RS is a solid, well-rounded choice for most standard applications** where sealed protection is beneficial. However, **carefully assess your specific conditions** before purchasing to ensure optimal performance and longevity.

Details:

All parts are in stock and ready to ship. Items are shipped using USPS, UPS, and FedEx. WPS 904165, 6206-2RS Bearing NOS. If the original package is included it may show signs of wear.

Bearing is new and in great condition, original packaging. Pictures: Thumbnails.

part #: 904165 prices

• $16.28-$25.99

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• brand: Wps
• mpn: 904165
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• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings

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