Product Description

Structure: Cylindrical Type: Roller Brand Name: ABL
Bore Size: 15 – 400 mm Outside Diameter: 35 – 600 mm Model Number: NJ211E.TVP2
Precision Rating: P0,P6,P5,P4 Seals Type: Open Number of Row: Single Row
Place of Origin: ZheJiang , China (Mainland) Width: 11-126 mm Material: Chrome steel
Cage: Brass, Steel, Nylon Package: as buyer’s request Clearance: C0,C2,C3,C4,C5
Vibration: V1, V2, V3 Available Standard: ISO9001:2008 Sample: available
OEM: available ODM: available

NJ207E.M1.C3 NJ2211E.TVP2 NJ2309E.M1.C3 NJ310E.TVP2
NJ207E.TVP2 NJ2211E.TVP2 NJ230E.M1.C3 NJ311E.M1.C3
NJ207E.TVP2 NJ2212E.M1.C3 NJ230E.M1.C3 NJ311E.TVP2
NJ208E.TVP2 NJ2213E.M1.C3 NJ2311E.TVP2 NJ312E.M1.C3
NJ209E.TVP2 NJ2213E.TVP2 NJ2312E.M1.C3 NJ312E.M1.C3
NJ210E.M1 NJ2214E.M1.C3 NJ232E.M1 NJ312E.TVP2
NJ210E.TVP2 NJ2215E.M1.C3 NJ232E.M1.C3 NJ312E.TVP2
NJ210E.TVP2 NJ2218E.M1.C3 NJ2334EX.M1.C3 NJ313E.M1.C3
NJ210E.TVP2.C3 NJ2219E.M1.C3 NJ236E.M1 NJ313E.TVP2
NJ211E.TVP2 NJ2220E.M1.C3 NJ236E.M1 NJ314E.TVP2
NJ211E.TVP2 NJ2222E.M1.C3 NJ236E.M1.C3 NJ314E.TVP2
NJ212E.M1.C3 NJ2224E.M1.C3 NJ238E.M1 NJ314E.TVP2.C3
NJ212E.TVP2 NJ2224E.TVP2 NJ238E.M1.C3 NJ315E.M1.C3
NJ212E.TVP2 NJ2226E.M1.C3 NJ248E.M1 NJ315E.M1.C3
NJ213E.M1.C3 NJ2226E.TVP2 NJ303E.TVP2 NJ315E.TVP2
NJ214E.M1.C3 NJ2228E.M1.C3 NJ304E.TVP2 NJ316E.M1.C3
NJ214E.M1.C3 NJ2228E.M1.C3 NJ304E.TVP2 NJ316E.TVP2
NJ215E.M1.C3 NJ2228E.M1.C3 NJ305E.TVP2 NJ316E.TVP2
NJ215E.TVP2 NJ222E.M1.C3 NJ306E.TVP2 NJ317E.M1.C3
NJ216E.M1.C3 NJ222E.M1.C3 NJ306E.TVP2 NJ317E.M1.C3
NJ217E.M1.C3 NJ222E.M1.C3 NJ307E.M1.C3 NJ317E.TVP2
NJ217E.TVP2 NJ222E.M1.C3 NJ307E.TVP2 NJ318E.M1.C3
NJ218E.M1.C3 NJ2230E.M1.C3 NJ307E.TVP2 NJ319E.TVP2
NJ2205E.TVP2.C3 NJ2232E.M1.C3 NJ308E.M1.C3 NJ320E.M1.C3
NJ2206E.TVP2 NJ224E.M1.C3 NJ308E.TVP2 NJ320E.M1.C3
NJ2208E.M1.C3 NJ224E.M1.C3 NJ308E.TVP2 NJ320E.TVP2.C3
NJ2209E.M1.C3 NJ226E.M1.C3 NJ309E.M1.C3 NJ322E.M1.C3
NJ2209E.TVP2 NJ228E.M1.C3 NJ309E.TVP2 NJ324E.M1.C3
NJ220E.M1.C3 NJ228E.M1.C3 NJ310E.M1.C3 NJ326E.M1.C3
NJ2210E.M1.C3 NJ2307E.TVP2 NJ310E.TVP2 NJ336E.M1.C3
      NJ336E.M1.C3

Cylindrical Roller Bearings
Rolling body is a cylindrical roller rolling bearing to the heart. Cylindrical Roller Bearings The internal structure of the roller was 90 ° perpendicular cross arrangement (which is also a cross roller bearing origin of the name), equipped with a space between the roller cage or spacers can be prevented inclined roller or rollers mutual grinding between police, effectively preventing the increase of rotational torque.
Bearing Features
1. roller and the raceway is in line contact or repair offline contacts, radial load capacity, suitable to withstand heavy load and shock load.
2. The friction coefficient is small, suitable for high-speed, speed close to the deep groove ball bearings.
3. N type and NU type can move axially, CZPT to adapt due to thermal expansion or installation error of shaft and housing caused by the relative change in position can be used for supporting the free end.
4. shaft or housing bore machining are higher, install the rear bearing outer ring axis relative deflection should be strictly controlled to avoid contact stress concentration.
5. The inner or outer detachable, easy installation and removal.
Product Features
Cylindrical roller line contact with the raceway, large radial load capacity. Both to withstand heavy load and impact load, but also for high-speed rotation.
Cylindrical roller bearings raceways and rolling lanes geometry. After the improved design, with high load carrying capacity, the new design CZPT and roller end, not only improves the axial bearing capacity, while improving the roller end wall contact areas and lubrication conditions, improved performance of the bearing.
 
Use application
Bearing use
Medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gear boxes, rolling mill, vibrating screen, and lifting transportation machinery.
Accuracy class
Cylindrical Roller Bearings PO, P6, P5, P4, P2. Accuracy class sequentially from low to high ranking can be divided according to level of accuracy.
 
Commonly used to adjust the full complement cylindrical roller bearings radial clearance as follows:
1, cylindrical and oval bearing backlash, can be manually scrape or bearing equatorial plane after turning padded scratch repair method of adjusting.
2, cylindrical and oval bearing the headspace, can be hand-scrape method or circumstances permit bearing the equatorial plane padded adjustments.
3, for more oil wedge fixed bearing, in principle, allow repair scratch and adjust the bearing clearance, the gap should be replaced with new tile inappropriate.
4, for more oil wedge tilting bearing, does not allow repair scratch pad, the gap should be replaced due to inappropriate tile. The thickness of the adjustable tile, tile can be adjusted by the amount of the adjustment in the next block behind tile plus stainless steel pad, thickness or thinned adjustment block approach. Note for more oil wedge tilting bearing, among the same group of tile thickness error should be less than 0.01mm.
 
Note issue
Vibration aspects
In normal use, the vibration of the bearing damage is very sensitive, peeling, indentation, corrosion, cracks, wear, etc. will be reflected in the bearing vibration measurement. So, through the use of special bearing vibration measurement device (frequency analyzer, etc.) to measure the size of the vibration, the frequency distribution can be inferred by abnormal circumstances. The measured values due to the use of conditions or bearing sensor installation location, etc., and thus requires prior to each machine measurements were determined after analysis and comparison criteria.
Terms of temperature
High temperature frequently expressed cylindrical roller bearings are in an abnormal situation. High temperature is also harmful to the bearing lubricant. Sometimes bearing overheating can be attributed to the bearing lubricant. If the bearing temperature over 125 ºC even move to reduce long-term bearing life. Causes high temperature bearings include: lack of lubrication or excessive lubrication, bearing raceways containing impurities, the speed limit is too high, bearing long-term overload and so on.

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Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: 35 – 600 mm
Material: Bearing Steel
Service: OEM
Feature: Low Noise and Low Vibration
Samples:
US$ 0.1/Piece
1 Piece(Min.Order)

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Customization:
Available

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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

Are there different cage materials commonly used in cylindrical roller bearings?

Yes, there are different cage materials commonly used in cylindrical roller bearings. The cage, also known as a retainer or separator, is a critical component that holds the cylindrical rollers in position and maintains their proper spacing. The choice of cage material depends on various factors such as application requirements, operating conditions, and the desired balance between strength, durability, and cost. Let’s explore some of the commonly used cage materials in cylindrical roller bearings:

  • Steel:

Steel cages are widely used in cylindrical roller bearings due to their excellent strength, durability, and wear resistance. Steel cages can withstand high operating temperatures and are suitable for applications with heavy loads and high-speed operation. The steel cages are typically made from low carbon steel, and in some cases, high-strength brass-coated steel or other alloyed steels are used for enhanced performance in demanding environments.

  • Brass:

Brass cages offer good strength, high corrosion resistance, and excellent heat dissipation properties. They are commonly used in cylindrical roller bearings for applications that require resistance to harsh operating conditions, such as high temperatures or corrosive environments. Brass cages are particularly suitable for slow to moderate speed applications where their excellent thermal conductivity can help dissipate heat effectively.

  • Polyamide (Nylon):

Polyamide cages, often referred to as nylon cages, are lightweight, corrosion-resistant, and have good wear properties. They offer low friction and allow for smooth rolling motion of the cylindrical rollers. Polyamide cages are commonly used in applications where reducing weight and inertia are important considerations, such as automotive and aerospace industries. They are also suitable for applications with moderate speeds and operating temperatures.

  • Phenolic Resin:

Phenolic resin cages are known for their high strength, low friction, and excellent dimensional stability. These cages provide good resistance to wear, chemicals, and heat. Phenolic resin cages are commonly used in high-speed cylindrical roller bearings where low cage weight and inertia are crucial for reducing friction and maintaining stable operation at high rotational speeds.

  • Other Materials:

In addition to the above-mentioned materials, other cage materials such as aluminum alloys, stainless steel, and engineered plastics may be used in specific applications. Aluminum alloy cages offer lightweight properties and good corrosion resistance, making them suitable for certain industries. Stainless steel cages provide high corrosion resistance and are used when the bearing operates in aggressive environments. Engineered plastics, such as PEEK (polyether ether ketone) or PTFE (polytetrafluoroethylene), are used for their self-lubricating properties, chemical resistance, and low friction characteristics.

The choice of cage material depends on factors such as load, speed, temperature, lubrication, and environmental conditions. Bearing manufacturers carefully select the appropriate cage material to ensure optimal performance, longevity, and reliability of the cylindrical roller bearing in a specific application.

cylindrical roller bearing

Can you describe the load-carrying capacity and load ratings of cylindrical roller bearings?

Cylindrical roller bearings have specific load-carrying capacity and load rating characteristics that determine their performance under different operating conditions. Let’s delve into the details of load-carrying capacity and load ratings for cylindrical roller bearings:

  • Radial Load-Carrying Capacity:

Cylindrical roller bearings are primarily designed to handle radial loads, which are forces applied perpendicular to the shaft. They have a high radial load-carrying capacity due to the arrangement of cylindrical rollers and their large contact area with the raceways. The load is distributed evenly along the length of the rollers, allowing cylindrical roller bearings to support heavy machinery components and withstand substantial radial forces.

  • Axial Load-Carrying Capacity:

While cylindrical roller bearings are primarily intended for radial loads, they can also accommodate moderate axial loads, which are forces applied parallel to the shaft. The axial load-carrying capacity of cylindrical roller bearings is limited compared to their radial load capacity. Therefore, for applications with predominantly axial loads, other types of bearings, such as thrust bearings, should be considered.

  • Dynamic Load Rating:

The dynamic load rating is a key parameter that indicates the maximum load a bearing can withstand under specific operating conditions without suffering premature fatigue failure. It is defined as the constant radial load (or radial equivalent load) that a group of identical bearings can theoretically endure for a rating life of one million revolutions. The dynamic load rating is specified by the bearing manufacturer and is expressed in Newtons (N) or pounds-force (lbf).

  • Static Load Rating:

The static load rating of a cylindrical roller bearing represents the maximum radial load it can sustain without exhibiting excessive permanent deformation. Unlike the dynamic load rating, which considers the fatigue life of the bearing, the static load rating focuses on the bearing’s ability to withstand a static load for an extended period without experiencing plastic deformation or other permanent damage. Similar to the dynamic load rating, the static load rating is provided by the manufacturer and is expressed in Newtons (N) or pounds-force (lbf).

  • Load Rating Calculation:

The load ratings of cylindrical roller bearings are determined through standardized calculation methods defined by international standards organizations such as ISO (International Organization for Standardization) and ABMA (American Bearing Manufacturers Association). These calculations take into account factors such as bearing dimensions, geometry, material properties, and operating conditions to establish the dynamic and static load ratings for a specific bearing model.

  • Application Considerations:

When selecting cylindrical roller bearings for a particular application, it is crucial to consider the expected load requirements, load orientation, and operating conditions. The calculated load ratings should be compared to the actual loads that the bearing will experience in the application to ensure that the chosen bearing can safely and reliably support the anticipated loads throughout its service life.

In conclusion, cylindrical roller bearings have a high radial load-carrying capacity and can accommodate moderate axial loads. The dynamic and static load ratings provided by the manufacturer serve as important parameters for assessing the bearing’s load-carrying capability and determining its suitability for specific applications.

China Best Sales CZPT Supplier Heavy Duty Cylindrical Roller Bearing (NJ211E)   with Best SalesChina Best Sales CZPT Supplier Heavy Duty Cylindrical Roller Bearing (NJ211E)   with Best Sales
editor by CX 2024-02-15