China supplier High Precision Thrust Ball Bearing with Steel Shell 51203 17X37X13 Shielded Thrust Ball Bearing for Scissor Jack bearing bronze

Product Description

  Thrust ball bearing is a separable bearing,it  consist of 2 precision chrome stee or stainless steel washers (ring) and a ball complement spaced by bronze retainer(as well as stainless steel stainer). Two washers are separated from retainer in structure. In order to make up for the shortcomings of separated thrust bearing, such as small load and easy to get dirty,compared with thrust ball bearing,thrust ball bearing with shields is thrust ball bearing covered with iron steel outside. RUNSTAR designs and manufactures shielded thrust ball bearings,it is belong to a one-pieces thrust ball bearings which has an outer iron shell to fix the thrust ball  bearing together as dust shield against  dust.

 

 

 

PRODUCTS CATALOGUE

 

Partial Thrust Ball Bearing with Shields
 

Part Number Raceway type  bore diameter of (d) outer diamter (D) thickness(H) Load Rating Cr(KN) Load Rating Cor(KN) Weight/g
51100 groove raceway 10 25.5 9     25g
51101 groove raceway 12 27 10     27g
51102 groove raceway 15 30 10     29g
51103 groove raceway 17 31.5 9.5     31g
51104 groove raceway 20 37 11     47g
51105 groove raceway 25 45 11.5     72g
51203 groove raceway 17 37 13     62g
51204 groove raceway 20 42 14.5     98g
51205 groove raceway 25 49 16     143g
51206 groove raceway 30 53 16     169g
51207 groove raceway 35 65 18         273g

 

 

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Precision Rating: ABEC-1, ABEC-3, Aberc-5
Type: Ball
Cage: Steel Cage.Brass Cage
Samples:
US$ 4/Set
1 Set(Min.Order)

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Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

shielded bearing

Are shielded bearings corrosion-resistant?

Shielded bearings can provide some level of corrosion resistance, but their resistance to corrosion depends on various factors such as the bearing materials, the type of shield used, and the operating conditions. Here’s a detailed explanation of the corrosion resistance of shielded bearings:

1. Bearing materials: The choice of materials used in the construction of shielded bearings can significantly impact their corrosion resistance. Common materials for shielded bearings include stainless steel, chrome steel, and ceramics. Stainless steel bearings are particularly known for their corrosion resistance due to the presence of chromium, which forms a passive oxide layer on the surface, protecting the bearing from corrosive elements. Chrome steel bearings, on the other hand, are less corrosion-resistant and may require additional measures for corrosion protection.

2. Shield type: Shielded bearings are equipped with shields that provide a barrier between the bearing’s internal components and the external environment. Shields can be made of various materials, including metal or non-metallic materials. Metal shields, such as steel or stainless steel, can offer better corrosion resistance compared to non-metallic shields, such as rubber or plastic. Metal shields provide a physical barrier against moisture, contaminants, and corrosive agents, reducing the likelihood of corrosion.

3. Operating conditions: The operating conditions in which shielded bearings are used can influence their corrosion resistance. Factors such as temperature, humidity, exposure to chemicals or corrosive substances, and the presence of water or moisture can contribute to corrosion. In environments with high humidity or exposure to corrosive substances, additional measures, such as proper sealing or the use of corrosion-resistant coatings, may be necessary to enhance the corrosion resistance of shielded bearings.

4. Maintenance and lubrication: Regular maintenance and proper lubrication of shielded bearings can contribute to their corrosion resistance. Lubricants can act as a protective barrier between the bearing surfaces and the surrounding environment, helping to prevent direct contact with corrosive agents. It’s important to use lubricants that are compatible with the bearing materials and provide adequate corrosion protection. Regular inspection and re-lubrication, as recommended by the bearing manufacturer, can help detect and mitigate any corrosion-related issues.

While shielded bearings can offer a certain level of corrosion resistance, it’s important to note that they may not be suitable for highly corrosive environments or applications where corrosion resistance is of utmost importance. In such cases, alternative bearing options, such as sealed or corrosion-resistant bearings, may be more appropriate.

When selecting shielded bearings for applications where corrosion resistance is a concern, it’s recommended to consult with the bearing manufacturer for specific recommendations and to consider factors such as the bearing materials, shield type, and the anticipated operating conditions.

shielded bearing

What sizes are available for shielded bearings?

Shielded bearings are available in a wide range of sizes to accommodate various applications and equipment. Here’s a detailed explanation of the sizes available for shielded bearings:

Shielded bearings are typically categorized based on their bore diameter, outer diameter, and width. The most common sizing convention used for shielded bearings is the ISO (International Organization for Standardization) standard, which provides standardized dimensions and tolerances for bearings. The sizes of shielded bearings are usually specified using a combination of alphanumeric codes that represent their dimensions.

The bore diameter is the inner diameter of the bearing and is denoted by the letter “d”. It is typically measured in millimeters (mm) or inches (in). Common bore diameter sizes for shielded bearings range from a few millimeters up to several hundred millimeters, depending on the specific application and industry requirements.

The outer diameter of the bearing is denoted by the letter “D” and is also measured in millimeters or inches. The outer diameter of shielded bearings can vary significantly, ranging from small sizes to several meters for large industrial applications.

The width or thickness of the bearing is denoted by the letter “B” and is again measured in millimeters or inches. The width of shielded bearings can vary depending on the design and application requirements.

Additionally, shielded bearings may have different series or designations that indicate specific dimensional and performance characteristics. Common series for shielded bearings include the 6000 series, 6200 series, 6300 series, and so on. Each series has its own range of sizes and load-carrying capacities.

It’s important to note that the availability of specific sizes may vary among manufacturers and suppliers. However, most manufacturers offer a wide range of standard sizes to meet common industry needs. They may also provide customized or specialized sizes based on customer requirements.

When selecting shielded bearings, it’s crucial to identify the appropriate size that matches the application’s load, speed, and operating conditions. Consult the manufacturer’s catalogs, technical specifications, or contact their representatives to determine the available sizes and choose the optimal bearing size for your specific application.

shielded bearing

How does a shielded bearing differ from a sealed bearing?

A shielded bearing and a sealed bearing are two different types of rolling bearings that offer varying levels of protection against contaminants and retention of lubrication. Here’s a detailed explanation of the differences between a shielded bearing and a sealed bearing:

Shielded Bearing:

A shielded bearing incorporates shields made of metal (typically steel or stainless steel) to cover the rolling elements and raceways of the bearing. The shields act as a physical barrier against solid contaminants, such as dust, dirt, or debris, preventing them from entering the bearing. The primary functions of the shields are to protect the internal components from contamination and retain the lubricating grease or oil within the bearing.

Shielded bearings provide moderate protection against contaminants, but they are not completely sealed. They allow for some exchange of air and limited penetration of fine particles. Shielded bearings are suitable for applications where the risk of contamination is moderate and where regular maintenance and relubrication can be performed. They are commonly designated with the suffix “Z” or “ZZ” in the bearing model or part number.

Sealed Bearing:

A sealed bearing, on the other hand, incorporates sealing elements made of synthetic rubber or other materials to provide a more effective barrier against contaminants. The seals are designed to completely enclose the internal components of the bearing and prevent the ingress of solid and liquid contaminants, such as dust, dirt, water, or chemicals.

Sealed bearings offer a higher level of protection and are suitable for applications where the risk of contamination is high or where maintenance and relubrication are more challenging. The seals help to extend the bearing’s service life, reduce the need for relubrication, and provide enhanced protection in harsh or demanding environments.

Sealed bearings are typically designated with the suffix “RS” or “2RS” in the bearing model or part number. The “RS” suffix indicates a single seal on one side of the bearing, while “2RS” indicates seals on both sides.

It’s important to note that while sealed bearings provide superior protection against contaminants, they may generate slightly more friction and heat due to the increased sealing contact compared to shielded bearings. This can result in a slightly lower operating speed or higher torque compared to shielded bearings.

The choice between a shielded bearing and a sealed bearing depends on the specific requirements of the application, including the level of contamination risk, the need for maintenance and relubrication, and the operating conditions. Consulting with bearing manufacturers, distributors, or industry experts can help in selecting the most appropriate bearing type for a given application.

Overall, shielded bearings and sealed bearings are both effective solutions for protecting rolling bearings, and the selection depends on the desired level of protection and the specific application requirements.

China supplier High Precision Thrust Ball Bearing with Steel Shell 51203 17X37X13 Shielded Thrust Ball Bearing for Scissor Jack   bearing bronzeChina supplier High Precision Thrust Ball Bearing with Steel Shell 51203 17X37X13 Shielded Thrust Ball Bearing for Scissor Jack   bearing bronze
editor by CX 2024-02-29

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