China factory Shielded Deep Groove Ball Bearings 61812 6812 1000812 Zz 2z Thin Wall Bearing bearing block

Product Description

Shielded Deep Groove Ball Bearings 671 ZZ 2Z thin wall bearing
<<Wide Application>>  Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, ship rudder shafts, skateboards, inline skates, and scooters, among others.
<<Material>> The bearing is made of high-quality bearing steel, good durability, and resistance to heavy loads.
<<Features>> Pre-lubricated, normal accuracy, less friction, higher speed, smooth and low noise
<<Strictly Shielded>>  Shields on both sides of the bearing help to keep dust out.

>> Single-row and double row
>> Open and sealed types
>> Chrome steel, ceramic or hybrid materials
>> Polyamide, steel, and brass cage assemblies
– 6000 series: 604.605.606.607.608.609.6000.6001.6002.6003.6004.6005.6006.6007.6008……..
– 6200 series: 624.625.626.627.628.629.6200.6201.6202.6203.6204.6205.6206.6207.6208……..
– 6300 series: 634.635.636.637.638.639.6300.6301.6302.6303.6304.6305.6306.6307.6308……..
– 6400 series: 6403.6404.6405.6406.6407.6408.6409.6410.6411.6412.6413.6414.6415……..
– 6700 series: 673.674.675.676.677.678.679.6700.6701.6702.6703.6704.6705
– 6800 series: 685.686.687.688.689.6800.6801.6802.6803.6804.6805.6806.6807.6808……..
– 6900 series: 695.696.697.698.699.6900.6901.6902.6903.6904.6905.6906.6907.6908.6909……..
– 16000 series: 16001.16002.16003.16004.16005.16006.16007.16008.16009.16571.16011……..

Detailed Photos


Products Details

Miniature Bearings Thin Section Bearings Flanged Ball Bearings
Angular Contact Ball Bearings Deep Groove Ball Bearings Thrust Ball Bearings
Self Aligning Ball Bearings Stainless Steel Ball Bearings Ceramic Ball Bearings

Chrome steel miniature bearings for shaft sizes from 1.5mm to 9mm

609-2RZ-C3 9 mm 618/4-ZZ 4 mm 618/5-ZZ 5 mm
629-2RS-C3 9 mm 618/4-2RS 4 mm 618/5-2RS 5 mm
618/3 3 mm 618/4-2RZ 4 mm 618/5-2RZ 5 mm
618/3-ZZ 3 mm 619/4 4 mm 619/5 5 mm
618/3-2RS 3 mm 619/4-ZZ 4 mm 619/5-ZZ 5 mm
618/3-2RZ 3 mm 619/4-2RS 4 mm 619/5-2RS 5 mm
619/3 3 mm 619/4-2RZ 4 mm 619/5-2RZ 5 mm
619/3-ZZ 3 mm 604 4 mm 605 5 mm
619/3-2RS 3 mm 604-ZZ 4 mm 605-ZZ 5 mm
603 3 mm 604-2RS 4 mm 605-2RS 5 mm
603-ZZ 3 mm 604-2RZ 4 mm 605-2RZ 5 mm
623 3 mm 624 4 mm 625 5 mm
623-ZZ 3 mm 624-ZZ 4 mm 625-ZZ 5 mm
623-2RS 3 mm 624-2RS 4 mm 625-2RS 5 mm
623-2RZ 3 mm 624-2RZ 4 mm 625-2RZ 5 mm
633 3 mm 634 4 mm 635 5 mm
633-ZZ 3 mm 634-ZZ 4 mm 635-ZZ 5 mm
633-2RS 3 mm 634-2RS 4 mm 635-2RS 5 mm
633-2RZ 3 mm 634-2RZ 4 mm 635-2RZ 5 mm
618/4 4 mm 618/5 5 mm 618/6 6 mm

Some advantages of HOJE Thin Section Ball Bearings are:
• Light weight    • Space Saving   • High stiffness 
• Accurate positioning   • Reduced overall design costs
• Can be successfully used in numerous bearing applications
• Easily modified or customized   • Multi-load capabilities 
• Variety of cross-sections & sizes 
• ABEC 1,3,5, and 7 available   • Race materials: 440C, 17-4PH, M50
• Ball materials: 440C, ceramic   
• Separator options: Phenolic, nylon, toroid,  formed wire, spacer balls, full complement,  helical coil springs

Thin Section Bearing Applications: 
• Polishing equipment • Textile equipment 
• Paper-making and  converting equipment
• Printing machinery
• Specialized industrial  equipment
• Tube and pipe-cutting equipment


Flanged bearings have a solid steel flange on the outer ring. This allows the bearing to be more easily located in a housing. The flange can also help to prevent axial movement of the bearing in the event of a thrust load on the bearing.

Bearing Number Bore Outer Width Flange Outer Flange Thickness
F6800 10 mm 19 mm 5 mm 21 mm 1 mm
F6900 10 mm 22 mm 6 mm 25 mm 1.5 mm
F6801 12 mm 21 mm 5 mm 23 mm 1.1 mm
F6901 12 mm 24 mm 6 mm 26 mm 1.5 mm
F6802 15 mm 24 mm 5 mm 26 mm 1.1 mm
F6902 15 mm 28 mm 7 mm 30 mm 1.5 mm
F6803 17 mm 26 mm 5 mm 28 mm 1.1 mm
F6903 17 mm 30 mm 7 mm 32 mm 1.5 mm
F6804 20 mm 32 mm 7 mm 35 mm 1.5 mm
F6904 20 mm 37 mm 9 mm 40 mm 2 mm
F6805 25 mm 37 mm 7 mm 40 mm 1.5 mm
F6905 25 mm 42 mm 9 mm 45 mm 2 mm
F6806 30 mm 42 mm 7 mm 45 mm 1.5 mm
F6906 30 mm 47 mm 9 mm 50 mm 2 mm
F6807 35 mm 47 mm 7 mm 50 mm 1.5 mm
F6907 35 mm 55 mm 10 mm 58 mm 2.5 mm
F6808 40 mm 52 mm 7 mm 55 mm 1.5 mm
F6908 40 mm 62 mm 12 mm 65 mm 2.5 mm
F6809 45 mm 58 mm 7 mm 61 mm 1.5 mm
F6909 45 mm 68 mm 12 mm 71 mm 2.5 mm
F6810 50 mm 65 mm 7 mm 68 mm 1.5 mm
F6910 50 mm 72 mm 12 mm 75 mm 2.5 mm

Our Stainless Steel and Thermoplastic Units outperform under the toughest of conditions. 
• Easy to install
• Reduces production downtime
• Complies with food safety regulations
• Long bearing life
• Can be customized to meet specific customer requirements
• HOJE offers product stocking programs
Stainless Steel and Thermoplastic housing:
• Cleaning and chemical resistant
• 440C Stainless Steel Bearings
• High Tensile Strength Housings
• Withstands Regular Washdowns
• Solid Stainless Steel  Bolt Hole Bush

Properties advantages of ceramic bearings compared with steel ball bearings: 
1. Higher limiting speeds: Ceramics is lighter than steel and can effectively restrain the centrifugal force, therefore enhancing the limiting speeds.
2. Higher precision usage: Ceramic has a higher hardness and elastic modulus than steel, which means ceramic bearings are more rigid than steel bearings, so therefore can be used in higher precision conditions.
3. Longer life: Lighter ceramic leads to a lower centrifugal force, this will extend the life of the bearing. Furthermore, the friction coefficient of ceramic is lower than steel, which also extends the life of the bearing
4. Higher temperature usage: Ceramic is more mechanically stable at elevated temperatures, therefore they could be used under higher temperatures.
5. Temperature-variation usage: Ceramics has a lower thermal expansion coefficient, and the clearance and tolerance variation is lower than those of steel bearings, which leads to a greater variation in the temperature range.
6. Better seizure resistance: Ceramics has a smaller thermal expansion coefficient; indicating less thermal deformation, therefore enhancing seizure resistance.
7. Could run without oil or grease: Ceramic never rusts and is self-lubricated, therefore can be used in applications that require no oil or grease.
8. Resistant to acid, alkali, and salt: The chemical industry is the largest potential application industry of ceramic bearings to be exploited.
9. More suitable for magnetic applications: Our ceramic bearings are non-magnetic, which means it is difficult for magnetic particles to adhere to the race, therefore reducing particle abrasion.



Packaging & Shipping


 1)Commercial Bearings packaging: 1pc/plastic bag + color box + carton + pallet
 2)Industrial Bearings packaging 
 3)According to the requirement of customers
 1) T/T:30% deposit, 70% should be paid before shipment.
 2) L/C at sight. (high bank charge, not suggested, but acceptable )
 3) 100% Western Union in advance. (especially for air shipment or small amounts)
 1) Less than 45 KGS, we will send by express. ( Door to Door, Convenient )
 2) Between 45 – 200 KGS, we will send by air transport. ( Fastest and safest, but expensive )
 3) More than 200 KGS, we will send by sea. ( Cheapest, but long time )


Company Advantages

1. FREE SAMPLES: contact us by email or trade manager, and we will send the free samples according to your request.
2. World-Class Bearing: We provide our customers with all types of bearings of world-class quality.
3. OEM or Non-Stand Bearings: Any requirement for Non-standard bearings is Easily Fulfilled by us due to our vast knowledge and links in the industry.
4. Genuine products With Excellent Quality: Company has always proved the 100% quality products it provides with genuine intent.
5. After-Sales Service and Technical Assistance: Company provides after-sales service and technical assistance as per the customer’s requirements and needs.
6. Quick Delivery: The company provides just-in-time delivery with its streamlined supply chain.
7. Cost Saving: We provide long-life, shock-resistant, and high-reliability bearings with excellent quality and better performance. Resulting in increased cost savings.
8. Attending customer queries promptly: We believe that if customers are satisfied then it proves our worth well. Customers are always given quick support.

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Contact Angle: 15°
Aligning: Non-Aligning Bearing
Separated: Unseparated
US$ 0/Piece
1 Piece(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

What are the advantages of using shielded bearings?

Shielded bearings offer several advantages over other types of bearings. Here’s a detailed explanation of the advantages of using shielded bearings:

  • Contamination Protection: One of the main advantages of shielded bearings is their ability to provide protection against contamination. The shields act as a physical barrier, preventing dust, dirt, moisture, and other contaminants from entering the bearing. This helps maintain the cleanliness of the internal components, reducing the risk of premature wear, damage, or failure.
  • Lubrication Retention: Shielded bearings also help retain lubrication within the bearing. The shields help to contain the lubricant and prevent it from escaping or being contaminated by external factors. This ensures that the rolling elements and raceways are adequately lubricated, reducing friction and wear, and promoting smoother operation and extended bearing life.
  • Simplicity and Cost-Effectiveness: Shielded bearings are relatively simple in design, consisting of an outer shield and an inner ring with rolling elements. This simplicity makes them easy to install and maintain. Additionally, shielded bearings tend to be more cost-effective compared to other bearing types, making them suitable for a wide range of applications.
  • Space-Saving: Shielded bearings have a compact design and do not require additional sealing components. This makes them space-saving and allows for more efficient use of available space in various applications and systems.
  • Speed and Temperature Capability: Shielded bearings are capable of operating at high speeds and handling moderate temperature variations. They are designed to provide stable performance and low friction even under demanding operating conditions.
  • Versatility: Shielded bearings are available in a variety of sizes, configurations, and materials to suit different application requirements. They can be used in a wide range of industries and systems, including automotive, industrial machinery, appliances, and more.
  • Easy Replacement: In the event of bearing failure or maintenance requirements, shielded bearings are relatively easy to replace. The shields can be removed to access the internal components for inspection, lubrication, or replacement, simplifying the maintenance process.

It’s important to note that while shielded bearings offer advantages in terms of contamination protection and lubrication retention, they may not provide the same level of sealing effectiveness as sealed bearings or other specialized bearing types. The choice of bearing type should be based on the specific requirements and operating conditions of the application.

By leveraging the advantages of shielded bearings, you can enhance the performance, reliability, and service life of rotating equipment and systems.

China factory Shielded Deep Groove Ball Bearings 61812 6812 1000812 Zz 2z Thin Wall Bearing   bearing blockChina factory Shielded Deep Groove Ball Bearings 61812 6812 1000812 Zz 2z Thin Wall Bearing   bearing block
editor by CX 2024-04-10

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