Product Description

Cylindrical roller bearings are available in a wide range of designs, series, variants and sizes. The main design differences are the number of roller rows and the inner/outer ring flanges as well as cage designs and materials.

The bearings can meet the challenges of applications faced with heavy radial loads and high speeds. Accommodating axial displacement (except for bearings with flanges on both the inner and outer rings), they offer high stiffness, low friction and long service life. 

Cylindrical roller bearings are also available in sealed or split designs. In sealed bearings, the rollers are protected from contaminants, water and dust, while providing lubricant retention and contaminant exclusion. This provides lower friction and longer service life. Split bearings are intended primarily for bearing arrangements which are difficult to access, such as crank shafts, where they simplify maintenance and replacements. 

Features and benefits

  • High load carrying capacity
  • High stiffness
  • Accommodate axial displacement 
    Except for bearings with flanges on both the inner and outer rings.
  • Low friction
    The open flange design, 
  • Together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction and higher axial load carrying capability.
  • Long service life
    The logarithmic roller profile reduces edge stresses at the roller/raceway contact  and sensitivity to misalignment and shaft deflection.
  • Enhanced operational reliability
    The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
  • Separable and interchangeable
    The separable components of cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.

Applications

Cylindrical roller bearings have characteristics that make them suitable for use in many types of industrial applications and essential for some. They can be used in both locating and non-locating bearing positions in bearing arrangements in for example:

  • Stationary gearboxes
  • Automotive gearboxes
  • Electric motors
  • Vibration motors
  • Wind turbines
  • Off-highway equipment
  • Pumps and compressors
  • Material handling equipment
  • Textile machinery
  • Rail vehicles
  • Rolling mills

 

Types NU, N, NNU, and NN are suitable as free-end bearings. 
Types NJ and NF can sustain limited axial loads in 1 direction.
Types NH and NUP can be used as fixed-end bearings.
NH-type cylindrical roller bearings consist of the NJ-type cylindrical roller bearings and HJ-type L-shaped thrust collars.
The inner ring loose rib of an NUP-type cylindrical roller bearing should be mounted so that the marked side is on the outside.
 

Parameters of Bearing
Model d D B Cr Cor Limiting Speed (r/min) Mass
(mm) (mm) (mm) (kN) (kN) Grease Oil (kg)
NU202 15 35 11 7.98 5.5 15000 19000
NU203 17 40 12 9.12 7 14000 18000
NU303 17 47 14 12.8 10.8 13000 17000 0.147
NU1004 20 42 12 10.5 9.2 13000 17000 0.09
NU204E 20 47 14 25.8 24 12000 16000 0.117
NU2204E 20 47 18 30.8 30 12000 16000 0.149
NU3O4E 20 52 15 29 25.5 11000 15000 0.155
NU2304E 20 52 21 39.2 37.5 10000 14000 0.216
NU1005 25 47 12 11 10.2 11000 15000 0.1
NU205E 25 52 15 27.5 26.8 11000 14000 0.14
NU2205E 25 52 18 32.8 33.8 11000 14000 0.168
NU305E 25 62 17 38.5 35.8 9000 12000 0.251
NU2305E 25 62 24 53.2 54.5 9000 12000 0.355
NU1006 30 55 13 13 12.8 9500 12000 0.12
NU206E 30 62 16 36 35.5 8500 11000 0.214
NU2206E 30 62 20 45.5 48 8500 11000 0.268
NU306E 30 72 19 49.2 48.2 8000 10000 0.377
NU2306E 30 72 27 70 75.5 8000 10000 0.538
NU406 30 90 23 57.2 53 7000 9000 0.73
NU1007 35 62 14 19.5 18.8 8500 11000 0.16
NU207E 35 72 17 46.5 48 7500 9500 0.311
NU2207E 35 72 23 57.5 63 7500 9500 0.414
NU307E 35 80 21 62 63.2 7000 9000 0.501
NU2307E 35 80 31 87.5 98.2 7000 9000 0.738
NU407 35 100 25 70.8 68.2 6000 7500 0.94
NU1008 40 68 15 21.2 22 7500 9500 0.22
NU208E 40 80 18 51.5 53 7000 9000 0.394
NU2208E 40 80 23 67.5 75.2 7000 9000 0.507
NU308E 40 90 23 76.8 77.8 6300 8000 0.68
NU2308E 40 90 33 105 118 6300 8000 0.974
NU408 40 110 27 90.5 89.8 5600 7000 1.25
NU1009 45 75 16 23.2 23.8 6500 8500 0.26
NU209E 45 85 19 58.5 63.8 6300 8000 0.45
NU2209E 45 85 23 71 82 6300 8000 0.55
NU309E 45 100 25 93 98 5600 7000 0.93
NU2309E 45 100 36 130 152 5600 7000 1.34
NU400 45 120 29 102 100 5000 6300 1.8
NU1571 50 80 16 25 27.5 6300 8000
NU210E 50 90 20 61.2 69.2 6000 7500 0.505
NU2210E 50 90 23 74.2 88.8 6000 7500 0.59
NU310E 50 110 27 105 112 5300 6700 1.2
NU2310E 50 110 40 155 185 5300 6700 1.79
NU410 50 130 31 120 120 4800 6000 2.3
NU1011 55 90 18 35.8 40 5600 7000 0.45
NU211E 55 100 21 80.2 95.5 5300 6700 0.68
NU2211E 55 100 25 94.8 118 5300 6700 0.81
NU311E 55 120 29 128 138 4800 6000 1.53
NU2311E 55 120 43 190 228 4800 6000 2.28
NU411 55 140 33 128 132 4300 5300 2.8
NU1012 60 95 18 38.5 45 5300 6700 0.48
NU212E 60 110 22 89.8 102 5000 6300 0.86
NU2212E 60 110 28 122 152 5000 6300 1.12
NU312E 60 130 31 142 155 4500 5600 1.87
NU2312E 60 130 46 212 260 4500 5600 2.81
NU412 60 150 35 155 162 4000 5000 3.4

SAMPLES
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.

CUSTOMIZED
The customized LOGO or drawing is acceptable for us.

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

OEM POLICY
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.

 

 

 

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Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small (28-55mm)
Samples:
US$ 1/Set
1 Set(Min.Order)

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Order Sample

Customization:
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Customized Request

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

ball bearing

What are the Materials Typically Used in Manufacturing Ball Bearings and Their Advantages?

Ball bearings are manufactured using a variety of materials, each chosen for its specific properties and advantages in various applications. Here are some commonly used materials in ball bearing manufacturing and their respective benefits:

  • High-Carbon Chrome Steel (AISI 52100):

This is the most common material used for ball bearing manufacturing. It offers excellent hardness, wear resistance, and fatigue strength. High-carbon chrome steel bearings are suitable for a wide range of applications, from industrial machinery to automotive components.

  • Stainless Steel (AISI 440C, AISI 304, AISI 316):

Stainless steel bearings are corrosion-resistant and suitable for applications where moisture, chemicals, or exposure to harsh environments are concerns. AISI 440C offers high hardness and corrosion resistance, while AISI 304 and AISI 316 provide good corrosion resistance and are often used in food and medical industries.

  • Ceramic:

Ceramic bearings use silicon nitride (Si3N4) or zirconia (ZrO2) balls. Ceramic materials offer high stiffness, low density, and excellent resistance to corrosion and heat. Ceramic bearings are commonly used in high-speed and high-temperature applications, such as in aerospace and racing industries.

  • Plastic (Polyamide, PEEK):

Plastic bearings are lightweight and offer good corrosion resistance. Polyamide bearings are commonly used due to their low friction and wear properties. Polyether ether ketone (PEEK) bearings provide high-temperature resistance and are suitable for demanding environments.

  • Bronze:

Bronze bearings are often used in applications where self-lubrication is required. Bronze has good thermal conductivity and wear resistance. Bearings made from bronze are commonly used in machinery requiring frequent starts and stops.

  • Hybrid Bearings:

Hybrid bearings combine steel rings with ceramic balls. These bearings offer a balance between the advantages of both materials, such as improved stiffness and reduced weight. Hybrid bearings are used in applications where high speeds and low friction are essential.

  • Specialty Alloys:

For specific applications, specialty alloys may be used to meet unique requirements. For example, bearings used in extreme temperatures or corrosive environments may be made from materials like titanium or hastelloy.

  • Coated Bearings:

Bearings may also be coated with thin layers of materials like diamond-like carbon (DLC) or other coatings to enhance performance, reduce friction, and improve wear resistance.

The choice of material depends on factors such as application requirements, operating conditions, load, speed, and environmental factors. Selecting the right material is essential for ensuring optimal bearing performance, longevity, and reliability in diverse industries and applications.

ball bearing

Are there any Industry Standards or Certifications that Ball Bearings should Meet?

Yes, there are several industry standards and certifications that ball bearings should meet to ensure their quality, performance, and reliability. These standards help manufacturers, engineers, and customers assess the suitability of bearings for specific applications. Some of the key standards and certifications for ball bearings include:

  • ISO Standards:

The International Organization for Standardization (ISO) has developed a series of standards related to ball bearings. ISO 15 defines dimensions, boundary dimensions, and tolerances for radial bearings. ISO 281 specifies dynamic load ratings and calculation methods for bearings’ life calculations.

  • ABEC (Annular Bearing Engineering Committee) Ratings:

ABEC ratings are commonly used in North America to indicate the precision and performance of ball bearings. Ratings range from ABEC 1 (lowest precision) to ABEC 9 (highest precision). However, it’s important to note that ABEC ratings focus primarily on dimensional tolerances and do not encompass all aspects of bearing quality.

  • DIN Standards:

The German Institute for Standardization (Deutsches Institut für Normung, DIN) has published various standards related to ball bearings. DIN 625 covers dimensions for deep groove ball bearings, while DIN 616 provides guidelines for precision angular contact ball bearings.

  • JIS (Japanese Industrial Standards):

JIS standards are used in Japan and internationally to define the characteristics and dimensions of various products, including ball bearings. JIS B 1512 outlines the classification and dimensions of rolling bearings.

  • ASTM (American Society for Testing and Materials) Standards:

ASTM has standards that cover various aspects of bearing testing, performance, and materials. ASTM F2215, for instance, specifies the requirements for ball bearings used in surgical implants.

  • CE Marking:

CE marking indicates that a product complies with European Union health, safety, and environmental requirements. It may be required for bearings used in machinery intended to be sold within the EU market.

  • Industry-Specific Standards:

Various industries, such as aerospace, automotive, medical, and nuclear, have specific standards or certifications that bearings must meet to ensure safety, reliability, and compliance with industry-specific requirements.

  • Quality Management Systems:

Manufacturers that adhere to quality management systems, such as ISO 9001, demonstrate their commitment to consistent product quality and customer satisfaction. Certification to these systems indicates that the manufacturing process follows established protocols and best practices.

When selecting ball bearings, it’s important to consider the relevant standards and certifications that align with the application’s requirements. This ensures that the bearings meet recognized quality and performance criteria, ultimately contributing to reliable and efficient operation.

ball bearing

What is a Ball Bearing and How does it Function in Various Applications?

A ball bearing is a type of rolling-element bearing that uses balls to reduce friction between moving parts and support radial and axial loads. It consists of an outer ring, an inner ring, a set of balls, and a cage that separates and maintains a consistent spacing between the balls. Here’s how ball bearings function in various applications:

  • Reduction of Friction:

Ball bearings function by replacing sliding friction with rolling friction. The smooth, spherical balls minimize the contact area between the inner and outer rings, resulting in lower friction and reduced heat generation.

  • Radial and Axial Load Support:

Ball bearings are designed to support both radial loads (forces perpendicular to the shaft’s axis) and axial loads (forces parallel to the shaft’s axis). The distribution of balls within the bearing ensures load-carrying capacity in multiple directions.

  • Smooth Rotational Movement:

Ball bearings facilitate smooth and precise rotational movement. The rolling motion of the balls allows for controlled and continuous rotation with minimal resistance.

  • Applications in Machinery:

Ball bearings are used in a wide range of machinery and equipment, including motors, generators, gearboxes, conveyors, and fans. They enable the efficient transfer of motion while reducing wear and energy losses.

  • Automotive Industry:

Ball bearings are extensively used in automobiles for various applications, including wheel hubs, transmission systems, steering mechanisms, and engine components. They provide reliability and durability in challenging automotive environments.

  • Industrial Machinery:

In industrial settings, ball bearings support rotating shafts and ensure the smooth operation of equipment such as pumps, compressors, and machine tools.

  • High-Speed Applications:

Ball bearings are suitable for high-speed applications due to their low friction and ability to accommodate rapid rotation. They are used in applications like electric motors and aerospace components.

  • Precision Instruments:

For precision instruments, such as watches, cameras, and medical devices, ball bearings provide accurate rotational movement and contribute to the overall performance of the instrument.

  • Variety of Sizes and Types:

Ball bearings come in various sizes, configurations, and materials to suit different applications. Different types include deep groove ball bearings, angular contact ball bearings, thrust ball bearings, and more.

In summary, ball bearings are essential components in a wide range of applications where smooth rotation, load support, and reduced friction are critical. Their versatility, reliability, and efficiency make them indispensable in industries spanning from automotive to industrial machinery to precision instruments.

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editor by CX 2024-05-06

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