China Best Sales CZPT Roller Bearing Hr30319DJ Hr30320DJ Hr30321DJ Hr30322DJ Use for Metallurgy, Plastic Machinery bearing engineering

Product Description

Product Description

NSK Roller Bearing  HR3571DJ HR30320DJ  HR30321DJ HR30322DJ use for metallurgy,plastic machinery
Tapered roller bearing is a separate type bearing, the inner and outer rings of the bearing have tapered raceway. This kind of bearing can be divided into single row tapered roller bearing, double row tapered roller bearing and 4 row tapered roller bearing. Single row tapered roller bearing can bear radial load and single direction axial load. When the bearing bears the radial load, it will produce an axial force component, so when it needs another bearing which can bear the opposite axial force to balance.

Product name Tapered roller bearings
Material Bearing Steel
Bearing Package Barreled, bagged, boxed, palletized or as customers’ requirement.
Service OEM service provided
Delivery time 3-10 days depends on quantity needed

Detailed Photos


Product Parameters

HR35711J HR30302J HR32203J HR32303J HR32003XJ HR30303DJ
HR35712J HR30303J HR32204J HR32304J HR32004XJ HR30304DJ
HR35713J HR30304J HR32205J HR32305J HR32005XJ HR30305DJ
HR35714J HR30305J HR32206J HR32306J HR32006XJ HR30306DJ
HR35715J HR30306J HR32207J HR32307J HR32007XJ HR30307DJ
HR35716J HR30307J HR32208J HR32308J HR32008XJ HR30308DJ
HR35717J HR30308J HR32209J HR32309J HR32009XJ HR30309DJ
HR35718J HR30309J HR32210J HR32310J HR32571XJ HR3571DJ
HR35719J HR3571J HR32211J HR32311J HR32011XJ HR3571DJ
HR35710J HR3571J HR32212J HR32312J HR32012XJ HR3571DJ
HR35711J HR3571J HR32213J HR32313J HR32013XJ HR3571DJ
HR35712J HR3571J HR32214J HR32314J HR32014XJ HR3571DJ
HR35713J HR3571J HR32215J HR32315J HR32015XJ HR3571DJ
HR35714J HR3571J HR32216J HR32316J HR32016XJ HR3 0571 DJ
HR35715J HR3 0571 J HR32217J HR32317J HR32017XJ HR3 0571 DJ
HR35716J HR3 0571 J HR32218J HR32318J HR32018XJ HR3 0571 DJ
HR35717J HR3 0571 J HR32219J HR32319J HR32019XJ HR3571DJ
HR35718J HR3571J HR32220J HR32320J HR32571XJ HR30320DJ
HR35719J HR30320J HR32221J HR32321J HR32571XJ HR30321DJ
HR35710J HR30321J HR32222J HR32322J HR32571XJ HR30322DJ
HR35711J HR30322J HR32224J HR32324J HR32571XJ HR30324DJ
HR35712J HR30324J HR32226J HR32326J HR32026XJ HR30326DJ
HR35714J HR30326J HR32228J HR32328J HR32571XJ HR30328DJ
HR35716J HR30328J HR32230J HR32330J HR32030XJ HR30330DJ
HR35718J HR30330J HR32232J   HR32032XJ HR30332DJ
HR35710J HR30332J HR32234J   HR32034XJ HR30334DJ
HR35712J HR30334J HR32236J   HR32036XJ HR30336DJ
HR35714J HR30336J HR32238J   HR32038XJ HR30338DJ
HR35716J HR30338J HR32240J   HR32040XJ HR30340DJ
HR35718J HR30340J     HR32044XJ  
HR35710J       HR32048XJ  

HR35711J HR30302J HR32203J HR32303J HR32003XJ HR30303DJ HR33205J HR33005J HR33108J HR35712J HR30303J HR32204J HR32304J HR32004XJ HR30304DJ HR33206J HR33006J HR33109J HR35713J HR30304J HR32205J HR32305J HR32005XJ HR30305DJ HR33207J HR33007J HR33110J HR35714J HR30305J HR32206J HR32306J HR32006XJ HR30306DJ HR33208J HR33008J HR33111J HR35715J HR30306J HR32207J HR32307J HR32007XJ HR30307DJ HR33209J HR33009J HR33112J HR35716J HR30307J HR32208J HR32308J HR32008XJ HR30308DJ HR33210J HR33571J HR33113J HR35717J HR30308J HR32209J HR32309J HR32009XJ HR30309DJ HR33211J HR33011J HR33114J HR35718J HR30309J HR32210J HR32310J HR32571XJ HR3571DJ HR33212J HR33012J HR33115J HR35719J HR3571J HR32211J HR32311J HR32011XJ HR3571DJ HR33213J HR33013J HR33116J HR35710J HR3571J HR32212J HR32312J HR32012XJ HR3571DJ HR33214J HR33014J HR33117J HR35711J HR3571J HR32213J HR32313J HR32013XJ HR3571DJ HR33215J HR33015J HR33118J HR35712J HR3571J HR32214J HR32314J HR32014XJ HR3571DJ HR33216J HR33016J HR33119J HR35713J HR3571J HR32215J HR32315J HR32015XJ HR3571DJ HR33217J HR33017J HR33120J HR35714J HR3571J HR32216J HR32316J HR32016XJ HR3 0571 DJ HR33218J HR33018J HR33121J HR35715J HR3 0571 J HR32217J HR32317J HR32017XJ HR3 0571 DJ HR33219J HR33019J HR33122J HR35716J HR3 0571 J HR32218J HR32318J HR32018XJ HR3 0571 DJ HR33220J HR33571J HR33124J HR35717J HR3 0571 J HR32219J HR32319J HR32019XJ HR3571DJ HR33221J HR33571J HR35718J HR3571J HR32220J HR32320J HR32571XJ HR30320DJ HR33571J HR35719J HR30320J HR32221J HR32321J HR32571XJ HR30321DJ HR33571J HR35710J HR30321J HR32222J HR32322J HR32571XJ HR30322DJ HR33026J HR35711J HR30322J HR32224J HR32324J HR32571XJ HR30324DJ HR33571J HR35712J HR30324J HR32226J HR32326J HR32026XJ HR30326DJ HR33030J HR35714J HR30326J HR32228J HR32328J HR32571XJ HR30328DJ HR35716J HR30328J HR32230J HR32330J HR32030XJ HR30330DJ HR35718J HR30330J HR32232J HR32032XJ HR30332DJ HR35710J HR30332J HR32234J HR32034XJ HR30334DJ HR35712J HR30334J HR32236J HR32036XJ HR30336DJ HR35714J HR30336J HR32238J HR32038XJ HR30338DJ HR35716J HR30338J HR32240J HR32040XJ HR30340DJ HR35718J HR30340J HR32044XJ HR35710J HR32048XJ HR32052XJ HR32056XJ HR32064XJ


Packaging & Shipping


Company Profile


Our Advantages

Our Advantages:
1. World-Class Bearing: We provide our customers with all types of indigenous bearing with world-class quality.
2. OEM or Non-Stand Bearings: Any requirement for Nonstandard bearings is Easily Fulfilled by us due to its vast knowledge and links in the industry.
3. Genuine products With Excellent Quality: The company has always proved the 100% quality products it provides with genuine intent.
4. After Sales Service and Technical Assistance: The company provides after-sales service and technical assistance as per the customer’s requirements and needs.
5. Quick Delivery: The company provides just-in-time delivery with its streamlined supply chain. 
1. Samples quantity: 1-10 PCS are available. 
2. Free samples: It depends on the Model No., material and quantity. Some of the bearings samples need client to pay samples charge and shipping cost. 
3. It’s better to start your order with Trade Assurance to get full protection for your samples order. 

The customized LOGO or drawing is acceptable for us. 

1. MOQ: 10 PCS standard bearings. 
2. MOQ: 1000 PCS customized your brand bearings. 

1. We can printing your brand (logo, artwork)on the shield or laser engraving your brand on the shield. 
2. We can custom your packaging according to your design
3. All copyright own by clients and we promised don’t disclose any info.



1.What is the minimum order quantity for this product?
    Can be negotiated, we will try our best to meet customer needs.Our company is mainly based on wholesale sales, most customers’orders are more than 1 ton.
2.What is your latest delivery time?
    Most orders will be shipped within 7-15 days of payment being received.
3.Does your company have quality assurance?
    Yes, for 1 years.
4.What is the competitiveness of your company’s products compared to other companies?
    High precision, high speed, low noise.
5.What are the advantages of your company’s services compared to other companies?
    Answer questions online 24 hours a day, reply in a timely manner, and provide various documents required by customers for customs clearance or sales. 100% after-sales service.
6.Which payment method does your company support?
    Do our best to meet customer needs, negotiable.
7.How to contact us quickly?
    Please send us an inquiry or message and leave your other contact information, such as phone number, account or account, we will contact you as soon as possible and provide the detailed information you need.

Please feel free to contact us, if you have any other question



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Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: 35mm-400mm
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing
US$ 10/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

plastic bearing

Can you describe the various types of seals and shields used with plastic bearings for contamination prevention?

Yes, I can describe the various types of seals and shields used with plastic bearings for contamination prevention. Here’s a detailed explanation:

  • 1. Contact Seals:

Contact seals, also known as lip seals or rubber seals, are common types of seals used with plastic bearings. These seals are made of elastomers such as nitrile rubber (NBR) or fluorocarbon rubber (FKM) and provide a physical barrier between the bearing and the external environment. Contact seals have a lip that makes direct contact with the inner or outer ring of the bearing, effectively preventing the entry of contaminants such as dust, dirt, or moisture. They offer good sealing performance and are suitable for applications with moderate operating speeds and temperatures.

  • 2. Non-Contact Seals:

Non-contact seals, also known as labyrinth seals or gap seals, are designed to minimize friction and allow for higher operating speeds. These seals consist of multiple labyrinth-like grooves or channels that create a tortuous path for contaminants, preventing their entry into the bearing. Non-contact seals are typically made of materials like plastic or metal. They offer reduced heat generation, lower torque, and increased efficiency compared to contact seals. However, they may not provide as high a level of contamination protection in extremely dusty or wet environments.

  • 3. Shields:

Shields, also referred to as metal shields or metal covers, are used with plastic bearings to provide a barrier against contaminants. Shields are generally made of metal, such as stainless steel or sheet steel, and are attached to the outer ring of the bearing. They have a gap or clearance between the shield and the inner ring, allowing for smooth rotation while preventing larger particles or debris from entering the bearing. Shields offer good protection against coarse contaminants and are suitable for applications with moderate speeds and temperatures.

  • 4. Combination Seals and Shields:

In certain applications, a combination of seals and shields may be used to provide enhanced contamination prevention. These combination seals and shields offer a dual-layered protection system. For example, a plastic bearing may have a contact seal on one side to provide effective sealing against contaminants, while a shield is used on the other side to provide additional protection and allow for visual inspection or lubrication access. This combination approach offers flexibility and adaptability to different operating conditions and contamination risks.

  • 5. Customized Sealing Solutions:

In addition to standard seals and shields, customized sealing solutions can be developed based on specific application requirements. Custom seals or shields can be designed to address unique challenges such as extreme temperatures, aggressive chemicals, or high-pressure environments. These specialized sealing solutions ensure optimal contamination prevention and performance in demanding applications.

In summary, plastic bearings can be equipped with various types of seals and shields for contamination prevention. Contact seals, non-contact seals, shields, and combination seals and shields are commonly used to provide a barrier against contaminants such as dust, dirt, or moisture. The selection of the appropriate sealing solution depends on factors such as operating conditions, contamination risks, speed requirements, and specific application needs. By effectively preventing contamination, these seals and shields contribute to the reliable and long-lasting performance of plastic bearings in diverse industrial and mechanical applications.

plastic bearing

Can plastic bearings be customized or machined for unique industrial needs?

Yes, plastic bearings can be customized or machined to meet unique industrial needs. Here’s a detailed explanation:

  • 1. Customized Design:

Plastic bearings can be customized in terms of their design, dimensions, and features to suit specific industrial requirements. Bearing manufacturers often offer customization options to tailor the bearings to the unique needs of different industries. This may involve modifying the bearing’s shape, adding specific features, adjusting tolerances, or incorporating special materials to enhance performance in specific applications.

  • 2. Material Selection:

Plastic bearings can be machined from various types of plastic materials, each with its own set of properties and characteristics. The choice of material can be customized based on the specific industrial needs. For example, some plastic materials offer enhanced chemical resistance, while others excel in high-temperature environments. By selecting the appropriate material, the bearings can be customized to withstand the unique operating conditions of the industry.

  • 3. Machining and Fabrication:

Plastic bearings can be machined or fabricated to achieve desired shapes, sizes, or configurations. Machining processes such as turning, milling, drilling, or grinding can be employed to modify the bearings according to specific requirements. This allows for precise customization of the bearing’s dimensions, bores, or mounting features to ensure a proper fit and compatibility with the industrial equipment or machinery.

  • 4. Special Additives or Reinforcements:

In some cases, plastic bearings can be customized by incorporating special additives or reinforcements. For example, solid lubricants such as PTFE (polytetrafluoroethylene) or graphite can be added to provide self-lubrication properties. Fiber or glass reinforcements can be included to enhance the bearing’s strength, stiffness, or load-carrying capacity. These customized modifications can be tailored to specific industrial needs, allowing the bearings to perform optimally in unique operating conditions.

  • 5. Application-Specific Testing and Validation:

When customizing plastic bearings for unique industrial needs, it is essential to perform application-specific testing and validation. This ensures that the customized bearings meet the performance requirements and can withstand the anticipated operating conditions. Testing may include evaluating factors such as load capacity, friction, wear resistance, temperature stability, or chemical compatibility to validate the suitability of the customized bearings for the intended application.

In summary, plastic bearings can be customized or machined to accommodate unique industrial needs. Customization options include design modifications, material selection, machining and fabrication, incorporation of special additives or reinforcements, and application-specific testing and validation. By customizing plastic bearings, industries can obtain bearings that are specifically tailored to their unique requirements, enabling optimal performance and reliability in their specific applications.

plastic bearing

Can you explain the advantages and characteristics of plastic bearings in various applications?

Plastic bearings offer several advantages and characteristics that make them suitable for various applications. Here’s a detailed explanation of the advantages and characteristics of plastic bearings:

  • Advantages of Plastic Bearings:

Plastic bearings provide several advantages over traditional metal bearings, depending on the specific application requirements. Here are some key advantages:

  • 1. Corrosion Resistance: Plastic bearings are highly resistant to corrosion, making them suitable for applications in environments where moisture, chemicals, or corrosive substances are present. Unlike metal bearings that may corrode over time, plastic bearings maintain their integrity and performance even in harsh conditions.
  • 2. Self-Lubrication: Many plastic bearings are designed with self-lubricating properties. They incorporate solid lubricants or additives within the plastic material, reducing the need for external lubrication. Self-lubricating plastic bearings offer lower friction, improved wear resistance, and reduced maintenance requirements.
  • 3. Lightweight: Plastic bearings are generally lighter in weight compared to metal bearings. This characteristic is advantageous in applications where weight reduction is desired, such as in automotive, aerospace, or portable equipment. The lighter weight of plastic bearings can contribute to energy savings, improved efficiency, and easier handling.
  • 4. Low Friction: Plastic bearings typically have low friction coefficients, which result in smoother operation and reduced energy consumption. The low friction properties of plastic bearings minimize wear and heat generation, leading to extended bearing life and improved overall system performance.
  • 5. Noise Reduction: Plastic bearings possess inherent damping properties that help reduce noise levels in machinery and equipment. The ability of plastic materials to absorb vibrations and dampen noise can enhance user comfort, reduce noise pollution, and improve the working environment.
  • 6. Electrical Insulation: Some plastic bearings offer electrical insulation properties, making them suitable for applications where electrical conductivity needs to be avoided. Plastic bearings can help prevent electrical current flow, reduce the risk of electrical arcing, and enhance safety in certain equipment or systems.
  • 7. Chemical Resistance: Plastic bearings exhibit excellent resistance to various chemicals, solvents, and aggressive substances. This characteristic makes them suitable for applications in chemical processing, pharmaceutical, and laboratory equipment where exposure to chemicals is common.
  • Characteristics of Plastic Bearings:

In addition to their advantages, plastic bearings have certain characteristics that make them well-suited for specific applications. Here are some notable characteristics:

  • 1. Material Selection: Plastic bearings are available in a wide range of materials, such as polytetrafluoroethylene (PTFE), polyoxymethylene (POM), polyamide (PA), or polyetheretherketone (PEEK). Each material offers unique properties, such as temperature resistance, chemical compatibility, wear resistance, or load-carrying capacity. The ability to select the most appropriate material for a specific application allows for customization and optimization of bearing performance.
  • 2. Design Flexibility: Plastic bearings can be manufactured using various molding or machining processes, providing design flexibility. The ability to create complex geometries, incorporate features like seals or flanges, or customize dimensions makes plastic bearings adaptable to diverse application requirements.
  • 3. Low Maintenance: Plastic bearings often require minimal maintenance due to their self-lubricating properties and resistance to corrosion and wear. This characteristic reduces the need for frequent re-lubrication or replacement, resulting in cost savings and increased equipment uptime.
  • 4. Temperature Range: While plastic bearings have temperature limitations compared to some metal bearings, certain plastic materials can withstand a wide temperature range. For example, PEEK bearings offer high-temperature resistance, making them suitable for applications that operate in elevated temperatures.
  • 5. Load Capacity: Plastic bearings generally have lower load-carrying capacities compared to metal bearings. However, advancements in plastic bearing design and material technology have allowed for the development of high-performance plastic bearings capable of handling moderate to heavy loads in specific applications.
  • 6. Cost-Effectiveness: Plastic bearings can offer cost advantages over metal bearings in certain scenarios. The lower material and production costs associated with plastic bearings, combined with their extended service life and reduced maintenance requirements, can result in overall cost savings throughout the lifespan of the equipment.

By leveraging the advantages and characteristics ofplastic bearings, engineers and designers can optimize the performance, reliability, and efficiency of machinery and equipment in a wide range of applications. The specific advantages and characteristics of plastic bearings should be carefully considered and evaluated based on the requirements of each application to ensure the optimal selection and utilization of these bearings.

China Best Sales CZPT Roller Bearing Hr30319DJ Hr30320DJ Hr30321DJ Hr30322DJ Use for Metallurgy, Plastic Machinery   bearing engineeringChina Best Sales CZPT Roller Bearing Hr30319DJ Hr30320DJ Hr30321DJ Hr30322DJ Use for Metallurgy, Plastic Machinery   bearing engineering
editor by CX 2024-05-15