China supplier CZPT CZPT CZPT Replacement Nk 19/16 Nk 19/20 Nk 20/16 Nk 20/20 Nks 20 Rna 4902 RS 2RS Rna 6902 Rnao 20X28X26 Needle Roller Bearings for Wind Turbine. supplier

Product Description


We can provide manufacturing capabilities and services of regular bearings for you, or customized non-standard bearings as you required.

  — Dimensions
  — Material
  — Tolerance standard

  — Logo (Laser Marking)
  — Package Design

With over 40 years experience of the bearing manufacturing, we know how to make good bearings with less cost consistently and efficiently.

We use advanced CNC turning, grinding, and superfinishing machines to ensure high, stable, and accurate machining.  All of your goods, from the most economical category, to the highest rated category, will always be manufactured precisely to the standards you require.


Heat treatment is 1 of the crucial processes to ensure high performance of bearing materials. Compared with other manufacturers, we can produce higher quality bearings at smaller cost, with a more flexible and controllable production schedule, and in a shorter time

We have 6 heat treatment production lines.

Bearings are heated uniformly, with small deformation and little/no oxidized decarburization, which can make them have high hardness, high fatigue resistance, good wear resistance, dimensional stability, and excellent mechanical strength.


All our products are characterized by low noise, low friction and long life.  This is due to our attention to the roundness, waviness and surface roughness of bearing raceway.

Our products fully meets the requirements of national and international standards according to the testing result of roughness, roundness, hardness, vibration noise, vibration velocity.

1, Inner package
   Corrosion and Dust Proof PE plastic film  / bag packing + Tube packing, or Wrapping  tape for larger bearings.
2, Corrugated Individual Box
   Our attractive sales-helpful “3-JOYS” package, or as the design of your package.
3, Outer package
  Corrugated carton + Wooden pallet 

  · Constant temperature (20°C) and humidity (RH 52%) warehouse
  · Hundreds of models on hand, short delivery time.



 We are happy to send you free samples of our bearings for field   testing. All transportation costs will be paid by us.

 Please note: Depending on the model and value of samples,   this policy may not apply!

 Please contact our sales staff for details.



To facilitate your payment, we offer a variety of options! 

1, About the lead time.
This depends on several factors, like Is the production schedule tight? Is there a corresponding model in stock, and is there enough of this model in stock? How many pcs of that model would be ordered?
Simply speaking, based on a 20′ GP container load:

If the model your Preferred is Sufficient stock Lead Time
Regular models YES Within 7 days
Regular models NO Within 30 days
Non-regular model NO About 50 days

For accurate estimate, please contact with our sale stuff. Thanks.

2, Minimum order quantity. 

Even just ONE piece of bearing is ok for us.

3, If you don’t know which model is the right choice…

We would like to give you some advise if you like, according to the real situation and demand of your local market. Our purpose is to help you to get proper and right models for your customers, so that you would make a better sales and income finally.

4, Factory Inspection

We surely would welcome you or your representatives to come to our plants or working offices to take a good look and chat with our hardworking CZPT employees. Ask our sales stuff and she/he will arrange that for you.     /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Cage: With Cage
Rows Number: Single
Load Direction: Radial Bearing
Style: Without Outer Ring, With Outer Ring, Without Inner Ring, With Inner Ring
Material: Carbon Chromium Steel
Type: Open
US$ 0/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

needle bearing

Impact of Needle Bearing Cage Materials on Performance

The choice of needle bearing cage material significantly influences the performance, durability, and overall functionality of the bearings. The cage, also known as the retainer, holds the needle rollers in place, maintaining proper spacing and alignment. Different cage materials offer varying characteristics that impact the bearing’s operation:

  • Steel Cages:

Steel cages are a common choice for needle bearings due to their durability, high strength, and resistance to wear. They are suitable for applications with high loads, moderate speeds, and normal operating temperatures. Steel cages provide excellent stability and consistent roller spacing.

  • Plastic Cages:

Plastic cages, often made from materials like polyamide (nylon), offer advantages such as low friction, reduced noise, and electrical insulation. They are commonly used in applications where low noise levels and lightweight design are essential. Plastic cages are ideal for moderate-speed applications with light to moderate loads.

  • Brass Cages:

Brass cages are valued for their high thermal stability and resistance to corrosion. They are often used in applications with elevated temperatures and aggressive environments. Brass cages maintain their structural integrity at high speeds and provide reliable performance in challenging conditions.

  • Metal-Polymer Composite Cages:

Composite cages combine the benefits of different materials, such as steel and plastic. These cages provide improved lubrication retention, reduced friction, and enhanced wear resistance. They are suitable for applications where extended maintenance intervals and low friction are desired.

  • Needle Cages:

In certain needle bearing configurations, the needles themselves act as the cage, eliminating the need for a separate cage component. This design reduces cage-related friction, contributing to improved efficiency and lower energy consumption.

When selecting the appropriate cage material for needle bearings, consider the specific requirements of the application:

  • Load and Speed:

Choose a cage material that can withstand the expected load and speed conditions without deformation or excessive wear.

  • Operating Environment:

If the bearing will operate in extreme temperatures, corrosive atmospheres, or other harsh conditions, select a cage material with the necessary resistance to maintain performance.

  • Friction and Lubrication:

Consider the friction characteristics of the cage material and how it interacts with the lubricant. Some materials reduce friction, while others may require additional lubrication.

  • Noise and Vibration:

For applications where noise reduction is important, choose a cage material that minimizes noise and vibration generation during operation.

  • Weight:

In weight-sensitive applications, select a lightweight cage material that doesn’t compromise overall system efficiency.

The cage material plays a critical role in maintaining proper needle roller alignment, reducing friction, and ensuring the longevity of needle bearings. By carefully considering the application’s demands, you can select the optimal cage material that aligns with performance goals and operating conditions.

needle bearing

Maintenance Practices to Extend the Life of Needle Bearings

Maintaining needle bearings is essential to ensure their longevity, optimal performance, and reliability in various applications. Proper maintenance practices can prevent premature wear, reduce downtime, and enhance overall efficiency. Here are specific maintenance practices that can extend the life of needle bearings:

  • Regular Inspection:

Perform visual inspections of the needle bearings on a routine basis. Check for signs of wear, pitting, contamination, or damage. Early detection allows for timely intervention and replacement if necessary.

  • Cleanliness:

Keep the surrounding environment clean and free from contaminants that can infiltrate the bearing assembly. Dust, dirt, and debris can lead to accelerated wear and reduced bearing life.

  • Lubrication:

Follow the manufacturer’s lubrication recommendations diligently. Adequate lubrication reduces friction, minimizes wear, and dissipates heat. Regularly replenish or replace the lubricant as needed.

  • Correct Lubricant:

Choose the appropriate lubricant for the specific application and operating conditions. Factors like temperature, speed, load, and exposure to contaminants influence the choice of lubricant.

  • Sealing and Protection:

Ensure that the bearing is properly sealed or shielded to prevent contamination. Seals and shields act as barriers against dust, moisture, and other particles that can compromise the bearing’s integrity.

  • Proper Handling:

Handle needle bearings with care during installation, ensuring they’re not dropped or mishandled. Avoid hitting the bearings, as impact forces can cause internal damage or misalignment.

  • Installation Techniques:

Follow recommended installation procedures, using the correct tools and techniques. Improper installation can lead to damage or misalignment, affecting the bearing’s performance.

  • Alignment:

Ensure proper alignment of shafts, housings, and bearing components. Misalignment can lead to increased friction, wear, and premature failure.

  • Temperature Management:

Monitor operating temperatures and ensure they remain within the specified range. Extreme temperatures can affect lubricant viscosity and cause thermal expansion, impacting bearing performance.

  • Load Considerations:

Operate within the recommended load capacity of the bearing. Overloading can accelerate wear and lead to early failure.

  • Regular Maintenance Schedule:

Develop a maintenance schedule that includes regular inspection, lubrication, and cleaning. Adhering to a routine ensures timely interventions and prevents unforeseen failures.

By implementing these maintenance practices, you can maximize the life of needle bearings and optimize their performance in a wide range of applications. Remember that proactive maintenance not only extends bearing life but also contributes to equipment reliability, efficiency, and overall operational success.

needle bearing

Advantages of Needle Bearings Compared to Other Types of Bearings

Needle bearings offer several key advantages over other types of bearings due to their unique design and capabilities. These advantages make needle bearings well-suited for specific applications where space constraints, high load capacity, and efficient motion are crucial. Here are the key advantages of using needle bearings in comparison to other types of bearings:

  • Compact Design:

Needle bearings have a slim and cylindrical shape with a high length-to-diameter ratio. This compact design allows for the accommodation of high radial loads in limited installation spaces, making them suitable for applications with space constraints.

  • High Load Capacity:

The longer cylindrical rollers of needle bearings distribute the load over a larger contact area. This characteristic enables needle bearings to handle high radial loads, making them suitable for applications requiring substantial load-carrying capabilities.

  • Reduced Friction:

The smaller diameter of needle rollers results in reduced contact angle with the bearing raceways. This leads to lower friction levels during operation, contributing to energy efficiency, reduced heat generation, and improved overall performance.

  • Precise Motion:

Needle bearings provide smoother and more precise rolling motion due to their reduced friction and contact area. This attribute is essential in applications demanding accurate and controlled movement.

  • High Rigidity:

Despite their slender profile, needle bearings exhibit high rigidity and stiffness. This characteristic is beneficial in applications where minimal deflection and precise positioning are required.

  • Lightweight:

The compact design of needle bearings results in lightweight components. This is advantageous in applications where minimizing weight is essential, such as in aerospace and automotive applications.

  • Versatility:

Needle bearings find use in various industries and applications, ranging from automotive and industrial machinery to aerospace and medical equipment. Their adaptability and performance make them a versatile choice for diverse requirements.

  • Reduced Heat Generation:

Due to their reduced friction and efficient load distribution, needle bearings generate less heat during operation. This contributes to extended bearing life and improved overall system efficiency.

  • Long Service Life:

The ability of needle bearings to handle high loads and operate with reduced friction leads to increased bearing longevity. This can result in reduced maintenance frequency and increased equipment uptime.

  • Cost-Effectiveness:

Needle bearings offer cost-effective solutions in applications where high load capacity and compact design are critical. Their ability to handle heavy loads within limited space can lead to optimized system designs.

Overall, the advantages of needle bearings make them a preferred choice in scenarios where their specific attributes align with the requirements of the application. These bearings excel in delivering efficient load handling, precise motion, and reliable performance.

China supplier CZPT CZPT CZPT Replacement Nk 19/16 Nk 19/20 Nk 20/16 Nk 20/20 Nks 20 Rna 4902 RS 2RS Rna 6902 Rnao 20X28X26 Needle Roller Bearings for Wind Turbine.   supplierChina supplier CZPT CZPT CZPT Replacement Nk 19/16 Nk 19/20 Nk 20/16 Nk 20/20 Nks 20 Rna 4902 RS 2RS Rna 6902 Rnao 20X28X26 Needle Roller Bearings for Wind Turbine.   supplier
editor by CX 2024-04-12

Recent Posts