Product Description

Products Description

Product name Cylindrical Roller Bearing
Applicable Industries Hotels,Garment Shops,Building Material Shops
Manufacturing Plant,Machinery Repair Shops,
Food &Beverage Factory,Farms,Restaurant,Home
Use,Retail,Food Shop,Printing Shops
Construction works,Energy &Mining,Food &
Beverage Shops,Advertising Company,Other
Place of Origin JiNan,China
Type Roller
Structure Cylindrical
Brand Name YINCHI
Model Number NJ NU NUP NF
material Chrome Steel GCr15
Load Capacity Radial load mainly
feature temperature resistance,strong stability,wear-
resistant
Clearance C2 CO C3 C4 C5
Keywords baleros
Stock Rich Stocks
Lubrication Grease or Oil
   

DETAILS 

TYPE OF BEARING

The different types of cylindrical roller bearings are designated based on their structural features and intended applications:
N..EM :Cylindrical roller bearing with a standard inner ring without any ribs, suitable for radial loads.
NU..EM :Bearing with a removable inner ring and 2 integral flanges on the outer ring, designed for high radial loads and accommodates axial displacement.
NJ..EM :Features a removable inner ring and 1 integral flange on the outer ring, primarily used for applications where axial displacement is required.
NF..EM :Similar to NJ type but designed for applications where the bearing is subjected to both radial and axial loads, but the axial displacement is not required.
NUP..EM :Cylindrical roller bearing with a removable inner ring and 1 integral flange on the outer ring, suitable for axial displacement and can also accommodate radial loads.
RN..EM :Special type with a non-removable inner ring and 1 integral flange on the outer ring, often used in specific design requirements.
RNU..EM :Bearing without an inner ring, designed for easy mounting and dismounting, suitable for applications where the inner ring cannot be used. These designations provide information about the bearing’s construction and its ability to withstand different types of loads and displacement.

Bearing Structure

 

Inner and outer race : The inner and outer race raceways form an organic rotating unit with the rolling element.
 

Rolling body : Transfers the load between the inner and outer rings.

Retainer : Optimizes the load and maintains the correct position and spacing of the rolling elements while preventing them from falling off during installation.
 

Integral seal: Extends bearing life, retains lubricant in the bearing, and effectively isolates contaminants.

 

Product Application

 Why Choose Us

 Material

We usually use bearing steel (GCr15), but many manufacturers only use softer carbon steel materials, so our bearings have higher hardness and longer service life.

 

Heat treatment
We have our own heat treatment plant and do not need to be outsourced.
We use a slower speed and more stable temperature to effectively control the steel and increase the toughness and life of the steel.

Other small-scale bearing companies usually need to outsource. Many outsourcing factories only strengthen the hardness of the bearing surface due to cost factors, but the hardness inside is not enough, which is the reason why many bad bearings are easy to crack.

 

Precision
Our bearings can be controlled at a height accuracy of 0~-0.004mm, fast speed and smoothness.

 

Multiple grinding process
We grind the bearing many times, but others may grind it only once, so the chamfer of our bearing is very smooth.

 

In conclusion
We use high-quality materials and multiple grinding processes, so our bearings have the characteristics of high speed, low noise, high precision and long life.

Product Testing

Company Profile
 

 

ZheJiang Yinshou Environmental Protection Equipment Co., Ltd. is a medium-sized environmental protection machinery and equipment company, located in HangZhou, the capital city of ZheJiang Province, with developed heavy industry, convenient transportation, near the remote wall International airport, and HangZhou such a port city only 2 hours’ drive, the company was founded in 2018, the International Trade Department was established in 2571, the introduction of technical personnel and equipment, expand the production line, To build a factory and warehouse, set up a logistics service team and an international after-sales service team, and truly realize a modern factory integrating research and development, production, testing, warehousing and sales. The factory covers an area of 3,000 square meters, with 53 sales team, 3 technical teams, 2 international after-sales teams, 5 production lines, total assets of nearly 100 million yuan, and annual production equipment up to 100,000.

Certifications

Our Team

 

FAQ

Q : Why choose us ?
A: a. With experiences over 10 years.
b. Strict inspection and high quality with reasonable price.
c. OEM service provided.
d. Delivery time is short.

Q: What kinds of bearing you supply?
A: main products are ball bearing, plastic bearing, ceramic bearing, needle bearings and
industrial tools, etc, as per customers’ drawings or samples.

Q: When inspecting bearings, what should we need to consider?
A: The precision of the bearings (dimension tolerance, loading rate), internal
clearance and hardness under heat treatment, structure of cage and material.

Q:Your product certifications?
A: ISO 9001:2008, RoHS,CE.

Q: Can I have a sample order?
A: Yes, it is available to check quality first. Mixed samples are also acceptable.

Q: What about the lead time?
A: 3-7 days for samples, 3-4 weeks for mass production.

Q:What is your payment method?
A: We accept T/T, PAYPAL or Western Union, credit card or via ALIBABA Assurance order.

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Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small (28-55mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing
Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

Customization:
Available

|

Customized Request

tapered roller bearing

What are the Challenges Associated with Thermal Expansion in Tapered Roller Bearings?

Thermal expansion presents several challenges in tapered roller bearings, particularly in industrial and high-speed applications. As the bearing components heat up during operation, they expand, which can impact the bearing’s performance, longevity, and overall operation. Here are the challenges associated with thermal expansion in tapered roller bearings:

  • Internal Clearance Reduction:

As the bearing components heat up, their dimensions increase due to thermal expansion. This reduction in internal clearance can lead to increased friction, higher operating temperatures, and even binding of the rolling elements.

  • Lubrication Concerns:

Thermal expansion can affect the distribution and viscosity of the lubricant within the bearing. If the lubricant thins out due to temperature rise, it may not provide adequate protection against friction and wear, potentially leading to premature failure.

  • Increased Friction and Wear:

With reduced internal clearance and potential changes in lubrication properties, the bearing is more susceptible to increased friction and wear. This can result in accelerated wear of the rolling elements, raceways, and cage.

  • Higher Operating Temperatures:

Thermal expansion contributes to elevated operating temperatures within the bearing assembly. Excessive heat generation can degrade the lubricant, weaken bearing materials, and reduce overall efficiency.

  • Alignment Issues:

Temperature-related expansion can lead to misalignment between bearing components, causing uneven loading and potential damage to the rollers and raceways. This misalignment can also lead to increased vibration and noise.

  • Variability in Fit and Clearance:

Components within the bearing may expand at different rates due to variations in material properties. This can result in changes in fit and clearance between components, affecting the overall stability and performance of the bearing.

  • Impact on Preload:

If a bearing is preloaded to eliminate internal clearance, thermal expansion can significantly affect preload values. This can lead to altered load distribution, increased stress on components, and potential bearing damage.

  • Performance Inconsistencies:

Thermal expansion can introduce inconsistencies in bearing performance, especially during transient operating conditions where temperature changes occur rapidly.

  • Limitations in High-Speed Applications:

In high-speed applications, the rapid temperature rise due to friction and heat generation can exacerbate the challenges of thermal expansion, necessitating careful design and lubrication strategies.

  • Design and Material Considerations:

Manufacturers must carefully consider the materials and design aspects of tapered roller bearings to account for thermal expansion effects. This may involve selecting materials with suitable thermal properties and optimizing internal clearances.

Managing thermal expansion challenges requires a comprehensive approach that involves proper bearing design, lubrication strategies, and monitoring of operating conditions. Addressing these challenges ensures that tapered roller bearings can perform optimally and reliably in various applications.

cylindrical roller bearing

How do cylindrical roller bearings perform in high-speed or high-temperature environments?

Cylindrical roller bearings are designed to perform reliably in high-speed or high-temperature environments, although their performance may be influenced by various factors. Let’s explore how cylindrical roller bearings perform under these conditions:

  • High-Speed Environments:

In high-speed environments, cylindrical roller bearings are subjected to increased centrifugal forces and higher operating temperatures. To accommodate these conditions, several design features are employed:

  • Cage Design:

Cylindrical roller bearings intended for high-speed applications often feature optimized cage designs. The cage, or retainer, holds the cylindrical rollers in position and prevents excessive friction and heat generation. Cages made of lightweight materials such as phenolic resin or engineered plastics help reduce inertia and minimize cage wear at high speeds.

  • Roller and Raceway Geometry:

The roller and raceway profiles are designed to minimize sliding friction and ensure proper roller guidance. Special attention is given to the surface finish and precision of these components to reduce friction and minimize heat generation. Additionally, high-speed cylindrical roller bearings may have specific modifications, such as optimized roller end profiles and surface coatings, to further enhance their performance in high-speed applications.

  • Lubrication:

Proper lubrication is crucial in high-speed environments to reduce friction, dissipate heat, and prevent premature wear. High-speed cylindrical roller bearings often require lubricants with specific properties, such as low viscosity and excellent thermal stability, to ensure effective lubrication under high-speed conditions. Lubrication methods, such as oil-air lubrication or oil mist lubrication, may be employed to provide sufficient lubricant supply to the bearing at high speeds.

  • High-Temperature Environments:

When operating in high-temperature environments, cylindrical roller bearings face challenges related to elevated temperatures and potential thermal expansion. To address these challenges, the following considerations are taken into account:

  • Bearing Materials:

High-temperature cylindrical roller bearings are often made from heat-resistant materials that can withstand elevated temperatures without compromising their mechanical properties. Common materials include high-temperature steels, heat-resistant alloys, or ceramics. These materials offer improved dimensional stability and resistance to thermal expansion, ensuring the bearing’s performance and longevity.

  • Lubrication:

Proper lubrication becomes even more critical in high-temperature environments. Lubricants with high-temperature stability, such as synthetic oils or greases specifically formulated for high temperatures, are used to maintain adequate lubrication properties and prevent premature lubricant degradation. Lubrication intervals may need to be adjusted to ensure sufficient lubricant replenishment under high-temperature conditions.

  • Clearance and Preload:

In high-temperature environments, the bearing’s internal clearance or preload may be adjusted to compensate for thermal expansion. Proper clearance or preload selection helps maintain the desired operating conditions and prevents excessive bearing play or preload loss due to thermal effects.

It’s important to note that the specific performance of cylindrical roller bearings in high-speed or high-temperature environments can vary depending on factors such as the bearing size, design, operating conditions, and the presence of additional cooling or heat dissipation measures. Consulting bearing manufacturers’ recommendations and considering the application requirements are crucial for selecting the appropriate cylindrical roller bearings for high-speed or high-temperature applications.

cylindrical roller bearing

How do cylindrical roller bearings contribute to reduced friction and heat generation?

Cylindrical roller bearings play a crucial role in reducing friction and minimizing heat generation in various applications. Let’s explore how these bearings contribute to these important factors:

  • Rolling Motion:

Cylindrical roller bearings facilitate rolling motion between the inner and outer rings, as well as the cylindrical rollers. This rolling motion significantly reduces friction compared to sliding or rubbing contact. Instead of sliding against each other, the rolling elements roll smoothly over the raceways, resulting in lower frictional forces. The reduced friction helps to minimize energy loss and heat generation within the bearing.

  • Precision Manufacturing:

Cylindrical roller bearings are precision-engineered components manufactured to tight tolerances. The surfaces of the rollers and raceways are carefully finished to ensure smooth and precise contact. The high precision in the bearing’s construction minimizes irregularities and imperfections that could cause increased friction and heat generation. By maintaining close tolerances, cylindrical roller bearings optimize performance and reduce frictional losses.

  • Lubrication:

Proper lubrication is essential for reducing friction and heat in cylindrical roller bearings. Lubricants create a thin film between the rolling elements and raceways, separating them and minimizing direct metal-to-metal contact. This lubricant film acts as a protective barrier, reducing friction and dissipating heat generated during operation. Adequate lubrication also helps to prevent wear, corrosion, and premature failure of the bearing.

  • Cage Design:

Cylindrical roller bearings often incorporate a cage or separator that spaces and guides the rollers. The cage retains the individual rollers in their proper positions, preventing them from contacting and rubbing against each other. This design feature not only maintains the integrity of the rolling elements but also reduces friction and heat generation by minimizing contact between adjacent rollers. The cage also helps to maintain proper lubricant distribution throughout the bearing.

  • Efficient Load Distribution:

Cylindrical roller bearings have a line contact between the rollers and raceways, which enables efficient load distribution. The cylindrical shape of the rollers allows them to bear loads along their length, spreading the load over a larger surface area compared to other bearing types. This even distribution of the load reduces localized stresses and friction at specific contact points, resulting in reduced heat generation.

  • Heat Dissipation:

Cylindrical roller bearings are typically designed with features that facilitate heat dissipation. They may incorporate special heat-treated components, such as rings and rollers, that have enhanced heat resistance properties. Additionally, the bearing design may include features such as grooves, holes, or special surface coatings to improve heat dissipation and prevent the buildup of excessive temperatures within the bearing assembly.

By minimizing friction and heat generation, cylindrical roller bearings contribute to improved efficiency, reduced energy consumption, and extended bearing life. These factors are crucial in various applications where the performance, reliability, and longevity of rotating machinery are critical considerations.

China Good quality Manufacturers Cylindrical Roller Bearing for Transmission   wheel bearingChina Good quality Manufacturers Cylindrical Roller Bearing for Transmission   wheel bearing
editor by CX 2024-02-17