China Custom Auto Bearing,Gearbox Bearing,Cylindrical Roller Bearing,N312,2312,Nu312,32312,Nj312,42312,NF312,12312,Ncl312,102312,Nup312,192312,Rn312,502312,Rnu312,292312, deep groove ball bearing

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.


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

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.




Shipping Cost:

Estimated freight per unit.

To be negotiated|

Freight Cost Calculator

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


Order Sample



Customized Request


Types of Ball Bearings

There are many types of Ball Bearings available on the market, but which one is best for your application? Here, we will discuss the differences between Angular contact, Single-row, High-carbon steel, and Ceramic ball bearings. These types of bearings also feature races, or a groove in the center of each. These races are important in keeping the balls contained within the cylinder. They also provide a groove-baed pathway.


The ceramic ball used in ball bearings has many advantages. It is lightweight, operates at lower temperatures, has reduced skidding, and is resistant to electrolysis. The ball also exhibits longer fatigue life. All of these factors make the ceramic ball a good choice for many applications. But, how do you know if a ceramic ball bearing is right for your application? Read on to discover why ceramic ball bearings are a better choice than steel or stainless steel ones.
The ceramic balls are 40% more dense than steel. This means less centrifugal force is generated on the bearing, which suppresses heat generation. Because of this reduced friction, ceramic bearings are more efficient at transferring energy. Compared to steel bearings, ceramic balls have longer life spans. Nonetheless, these ceramic balls aren’t as strong as steel. Therefore, it is important to understand the limitations of the ceramic ball bearing before buying one.
The ceramic materials used for ball bearings are resistant to micro-welding. Metals undergo this process when imperfections in the surfaces interact. Eventually, this results in a brittle ball that reduces the life of a bearing. Unlike metals, ceramic materials have a stable behavior at high temperatures and exhibit less thermal expansion. This means that they can be used for applications where lubrication isn’t an option.
While steel balls can easily absorb contaminants and foreign particles, the ceramic ball is insensitive to this, and doesn’t require lubrication. This means they’re not susceptible to corrosion and other common problems. These are just a few reasons why ceramics are a better choice. This technology has a wide range of uses. It’s easy to see why it is so popular. If you’re looking for a new bearing for your application, be sure to contact an AST Applications Engineer. They can analyze your operating conditions and potential failure modes.

Angular contact

An Angular Contact Ball Bearing (also known as an angular-contact bearing) has an axial component that is generated when radial loads are applied. They are generally used in pairs, triplex sets, or quadruplex sets. These bearings are also available with Super Finished Raceways to reduce noise and improve lubricant distribution. Angular contact ball bearings have various design units, such as bore size, outer diameter, and outer ring width.
A single-row angular contact bearing has a radial contact angle that is equal to the angular distance between the two rings. Double-row angular bearings are designed for two-way thrust capability. These types of bearings can be purchased at Grainger and other online retailers. A typical angular contact bearing will last up to a million revolutions. They are often used in industrial angular contact bearings.
Single-row angular contact ball bearings feature a set contact angle. These bearings can support radial and axial loads, but they can’t withstand high speeds. Single-row angular contact ball bearings may also have one or two shoulders relieved. Thrust load is a pressure placed on the bearing when it is installed in an assembly, and it is used to create an angle between the races.
Angular contact ball bearings come in single and double-row configurations. They differ in the axial load they can carry and the type of lubrication they use. Angular contact ball bearings are ideal for high-speed applications and can accommodate both radial and axial loads. The type of contact and lubrication used in angular-contact ball bearings depends on the intended use for the bearing.

High-carbon steel

Carbon steel is a low-alloy and high-carbon steel used in bearings. This material provides superior strength and fatigue properties for ball and roller bearings. Its mechanical properties are ideal for applications where the temperature is less than 400 degrees Fahrenheit. High-carbon steel is also used to make bearing components for chrome steel bearings. These types of steels are softer than chrome steel but provide superior durability in applications where the material is exposed to severe conditions.
Hardened carbon steel balls with an AISI 1015 hardness index are used in a variety of automotive, commercial, and semi-precision applications. In addition to automotive applications, they are also used in slides, trolleys, and conveyors. AISI 1015 carbon steel balls are used in bearings. They can be purchased in a variety of weights and diameters. Carbon steel balls can also be purchased in nickel-plated or uncoated varieties for decorative purposes.
In order to determine whether a ball bearing is made of high-carbon steel, the material must be tested for its hardness. An ordinary pocket magnet will work well, but an ordinary rare earth magnet isn’t powerful enough to measure the hardness. If it attracts the magnet strongly, the metal is steel, while a weak magnet indicates a non-ferrous material. A hardness test requires a special microhardness test.
A lower-carbon steel is another option. Some miniature bearing manufacturers use a material with less carbon than AISI 440C. This material is also known as KS440 or X65Cr13. After being heat-treated, it develops smaller carbides, resulting in superior low-noise characteristics and the same corrosion-resistance as 440C. These materials are a less expensive alternative than chrome steel, but they are often less durable than chrome alloy steel.


Single-row angular contact ball bearings accommodate axial loads in one direction. These are normally adjusted against a second bearing. Unlike other ball bearings, they are non-separable and contain an upper and lower shoulder. Single-row ball bearings are made of Chromium Steel (GCr15) which is heat-treated to achieve high uniform hardness and excellent wear resistance. They are the most commonly used type of bearings in the world.
Because of the angular contact between the radial plane and the raceway, single-row ball bearings transmit radial forces from raceway to raceway. A higher a, the greater the axial load carrying capacity of the bearing. Single-row angular contact ball bearings are ideal for high axial loads. However, they have limited preload capabilities and must be installed in pairs. Hence, they are best used for applications where axial forces must be distributed.
Single-row ball bearings can be pre-lubricated and have steel shields. They are also available with rubber seals or snap rings on the outside edge. They are available with various retainers, including pressed steel cages, plastic shields, and rubber seals. A tapered bore is also available upon request. They are ideal for applications where space is limited. The 6200 series of bearings are especially well suited for electrical motors, dental hand tools, and optical encoders.
Single-row angular contact ball bearings are widely used for axial loads. The outer and inner rings have slightly larger radii than the balls. These bearings can accommodate high speeds and low torque. They can also be supplied with different grease levels. If grease is needed, you can choose a lubricant that has different characteristics depending on the application. They are easy to install and maintain. However, they are not recommended for adjacent mounting.


A plastic ball bearing is a highly versatile component that can be mounted in a variety of components, including wheels, pulleys and housings. The outer ring of a plastic bearing is usually the pulley profile. The inner ring can be made of a shaft or polymer. The integrated design of a plastic ball bearing helps to reduce assembly time and cost. Here are some of the benefits of this type of bearing:
First and foremost, plastic balls are lighter than metal balls. They also have less magnetic properties than steel balls, making them the best option for applications requiring low weight and noise. Glass balls are also lighter than stainless steel balls, making them the ideal metal-free choice. They are also very corrosion-resistant, which makes them a great choice for some applications. In addition to being lightweight, polymer ball bearings are also quiet. And because of their low weight, plastic ball bearings are ideal for applications that require fast speed.
Another advantage of plastic bearings is their ability to withstand high temperatures. This material is also abrasion and corrosion-resistant. It meets FDA and USDA acceptance requirements. Aside from its abrasion-resistant and corrosion-resistant properties, these plastics do not transfer heat. Aside from being extremely durable and flexible, most plastics are also self-lubricating. Common plastics include phenolics, acetals, nylon, and ultra high molecular weight polyethylene. Nonetheless, plastics have limitations, and these materials may be damaged by extreme temperatures or cold flow under heavy loads.
Other advantages of plastic ball bearings include their low density, high hardness and low friction coefficient, and ability to withstand heat and corrosion. Ceramics are also lightweight, non-conductive, and have superior resistance to friction. These products can withstand temperatures up to 1,800 degrees Fahrenheit. If you’re in the market for a plastic ball bearing, it’s important to choose the right type of material. And if you’re looking for a high-quality bearing, look no further.

China Custom Auto Bearing,Gearbox Bearing,Cylindrical Roller Bearing,N312,2312,Nu312,32312,Nj312,42312,NF312,12312,Ncl312,102312,Nup312,192312,Rn312,502312,Rnu312,292312,   deep groove ball bearingChina Custom Auto Bearing,Gearbox Bearing,Cylindrical Roller Bearing,N312,2312,Nu312,32312,Nj312,42312,NF312,12312,Ncl312,102312,Nup312,192312,Rn312,502312,Rnu312,292312,   deep groove ball bearing
editor by CX 2023-04-18