China Koyo Timken NTN NSK Original Taper Tapered Roller Bearing 30202 30203 30204 30205 30206 30207 30208 30209 30210 30211 30212 30213 30214 30215 30311 31311 bearing bronze

Product Description

Product name: koyo CZPT CZPT brand Bearing 3571 31311 bearing factory 3571 31311 55*120*31.5mm   
Material: Gcr15 Chrome steel
Brand: NSK/ CZPT CZPT NTN 
Cage: Steel cage
Feature: High precision, low noise, long life
Package: Plastic bags /Single box + outer carton box+ pallets
Application: Widely used in automobiles, rolling mills, mines, metallurgy, plastic machinery, and other industries
Notes:
 
1. The bearings inside shall be kept dustproof;
2. The working temperature shall be no higher than the rated operating temperature;
3. The bearings shall be used acid-free environment;
4. The bearings shall be kept in relative humidity under 60%; 
5. The bearings shall be handled gently, avoiding falling, knocking, or hitting it;
6. The bearings shall be installed evenly

Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly (containing the rollers and a cage).
The non-separable inner ring and roller assembly are called the cone, and the outer ring is called the cup. Internal clearance is established during mounting by the axial position of the cone relative to the cup.

Taper roller bearings belong to detachable bearings and are divided into single, double, and four-row taper roller bearings according to the number of rolling body columns. Widely used in automobiles, rolling mills, mines, metallurgy, plastic machinery, and other industries

Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T kg   d D T kg
35712 15 35 11 0.053 30302 15 42 13 0.098
35713 17 40 13.25 0.079 30303 17 47 15.25 0.129
35714 20 47 15.25 0.126 30304 20 52 16.25 0.165
35715 25 52 16.25 0.154 30305 25 62 18.25 0.263
35716 30 62 17.25 0.231 30306 30 72 20.75 0.387
35717 35 72 18.25 0.331 30307 35 80 22.75 0.515
35718 40 80 19.75 0.422 30308 40 90 25.25 0.747
35719 45 85 20.75 0.474 30309 45 100 27.25 0.984
35710 50 90 21.75 0.529 3571 50 110 29.25 1.28
35711 55 100 22.75 0.713 3571 55 120 31.5 1.63
35712 60 110 23.75 0.904 3571 60 130 33.5 1.99
35713 65 120 24.75 1.13 3571 65 140 36 2.44
35714 70 125 26.25 1.26 3571 70 150 38 2.98
35715 75 130 27.25 1.36 3571 75 160 40 3.57
                   
Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T KG   d D T KG
32203 17 40 17.25 0.102 32304 20 52 22.25 0.23
32204 20 47 19.25 0.16 32305 25 62 25.25 0.368
32205 25 52 19.25 0.187 32306 30 72 28.75 0.562
32206 30 62 21.25 0.287 32307 35 80 32.75 0.763
32207 35 72 24.25 0.445 32308 40 90 35.25 1.04
32208 40 80 24.75 0.532 32309 45 100 38.25 1.4
32209 45 85 24.75 0.573 32310 50 110 42.25 1.89
32210 50 90 24.75 0.626 32311 55 120 45.5 2.37
32211 55 100 26.75 0.853 32312 60 130 48.5 2.9
32212 60 110 29.75 1.17 32313 65 140 51 3.51
32213 65 120 32.75 1.55 32314 70 150 54 4.34
32214 70 125 33.25 1.64 32315 75 160 58 5.37
32215 75 130 33.25 1.74 32316 80 170 61.5 6.38
                   
Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T KG   d D T KG
32004X 20 42 15 0.095 33005 25 47 17 0.129
32005X 25 47 15 0.11 33006 30 55 20 0.201
32006X 30 55 17 0.17 33007 35 62 21 0.25
32007X 35 62 18 0.224 33008 40 68 22 0.306
32008X 40 68 19 0.267 33009 45 75 24 0.398
32009X 45 75 20 0.337 33571 50 80 24 0.433
32571X 50 80 20 0.366 33011 55 90 27 0.651
32011X 55 90 23 0.551 33012 60 95 27 0.691
32012X 60 95 23 0.584 33013 65 100 27 0.732
32013X 65 100 23 0.62 33014 70 110 31 1.07
32014X 70 110 25 0.839 33015 75 115 31 1.12
32015X 75 115 25 0.872 33016 80 125 36 1.63

FAQ:

Q: Are you trading company or manufacturer ?

A: We are factory of the bearing in china

Q: How long is your delivery time?

A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock,
it is according to quantity of the bearing china.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q: What is your terms of payment ?

A: Payment=10000USD, 30% T/T in advance ,
balance before shippment.
If you have another question, pls feel free to contact us.
 

US $0.5-10
/ Piece
|
1 Piece

(Min. Order)

###

Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small and Medium-Sized (60-115mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing

###

Customization:

###

Product name: koyo NTN NSK brand Bearing 30311 31311 bearing factory 30311 31311 55*120*31.5mm   
Material: Gcr15 Chrome steel
Brand: NSK/ KOYO TIMKEN NTN 
Cage: Steel cage
Feature: High precision, low noise, long life
Package: Plastic bags /Single box + outer carton box+ pallets
Application: Widely used in automobiles, rolling mills, mines, metallurgy, plastic machinery, and other industries
Notes:
 
1. The bearings inside shall be kept dustproof;
2. The working temperature shall be no higher than the rated operating temperature;
3. The bearings shall be used acid-free environment;
4. The bearings shall be kept in relative humidity under 60%; 
5. The bearings shall be handled gently, avoiding falling, knocking, or hitting it;
6. The bearings shall be installed evenly

###

Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T kg   d D T kg
30202 15 35 11 0.053 30302 15 42 13 0.098
30203 17 40 13.25 0.079 30303 17 47 15.25 0.129
30204 20 47 15.25 0.126 30304 20 52 16.25 0.165
30205 25 52 16.25 0.154 30305 25 62 18.25 0.263
30206 30 62 17.25 0.231 30306 30 72 20.75 0.387
30207 35 72 18.25 0.331 30307 35 80 22.75 0.515
30208 40 80 19.75 0.422 30308 40 90 25.25 0.747
30209 45 85 20.75 0.474 30309 45 100 27.25 0.984
30210 50 90 21.75 0.529 30310 50 110 29.25 1.28
30211 55 100 22.75 0.713 30311 55 120 31.5 1.63
30212 60 110 23.75 0.904 30312 60 130 33.5 1.99
30213 65 120 24.75 1.13 30313 65 140 36 2.44
30214 70 125 26.25 1.26 30314 70 150 38 2.98
30215 75 130 27.25 1.36 30315 75 160 40 3.57
                   
Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T KG   d D T KG
32203 17 40 17.25 0.102 32304 20 52 22.25 0.23
32204 20 47 19.25 0.16 32305 25 62 25.25 0.368
32205 25 52 19.25 0.187 32306 30 72 28.75 0.562
32206 30 62 21.25 0.287 32307 35 80 32.75 0.763
32207 35 72 24.25 0.445 32308 40 90 35.25 1.04
32208 40 80 24.75 0.532 32309 45 100 38.25 1.4
32209 45 85 24.75 0.573 32310 50 110 42.25 1.89
32210 50 90 24.75 0.626 32311 55 120 45.5 2.37
32211 55 100 26.75 0.853 32312 60 130 48.5 2.9
32212 60 110 29.75 1.17 32313 65 140 51 3.51
32213 65 120 32.75 1.55 32314 70 150 54 4.34
32214 70 125 33.25 1.64 32315 75 160 58 5.37
32215 75 130 33.25 1.74 32316 80 170 61.5 6.38
                   
Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T KG   d D T KG
32004X 20 42 15 0.095 33005 25 47 17 0.129
32005X 25 47 15 0.11 33006 30 55 20 0.201
32006X 30 55 17 0.17 33007 35 62 21 0.25
32007X 35 62 18 0.224 33008 40 68 22 0.306
32008X 40 68 19 0.267 33009 45 75 24 0.398
32009X 45 75 20 0.337 33010 50 80 24 0.433
32010X 50 80 20 0.366 33011 55 90 27 0.651
32011X 55 90 23 0.551 33012 60 95 27 0.691
32012X 60 95 23 0.584 33013 65 100 27 0.732
32013X 65 100 23 0.62 33014 70 110 31 1.07
32014X 70 110 25 0.839 33015 75 115 31 1.12
32015X 75 115 25 0.872 33016 80 125 36 1.63
US $0.5-10
/ Piece
|
1 Piece

(Min. Order)

###

Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small and Medium-Sized (60-115mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing

###

Customization:

###

Product name: koyo NTN NSK brand Bearing 30311 31311 bearing factory 30311 31311 55*120*31.5mm   
Material: Gcr15 Chrome steel
Brand: NSK/ KOYO TIMKEN NTN 
Cage: Steel cage
Feature: High precision, low noise, long life
Package: Plastic bags /Single box + outer carton box+ pallets
Application: Widely used in automobiles, rolling mills, mines, metallurgy, plastic machinery, and other industries
Notes:
 
1. The bearings inside shall be kept dustproof;
2. The working temperature shall be no higher than the rated operating temperature;
3. The bearings shall be used acid-free environment;
4. The bearings shall be kept in relative humidity under 60%; 
5. The bearings shall be handled gently, avoiding falling, knocking, or hitting it;
6. The bearings shall be installed evenly

###

Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T kg   d D T kg
30202 15 35 11 0.053 30302 15 42 13 0.098
30203 17 40 13.25 0.079 30303 17 47 15.25 0.129
30204 20 47 15.25 0.126 30304 20 52 16.25 0.165
30205 25 52 16.25 0.154 30305 25 62 18.25 0.263
30206 30 62 17.25 0.231 30306 30 72 20.75 0.387
30207 35 72 18.25 0.331 30307 35 80 22.75 0.515
30208 40 80 19.75 0.422 30308 40 90 25.25 0.747
30209 45 85 20.75 0.474 30309 45 100 27.25 0.984
30210 50 90 21.75 0.529 30310 50 110 29.25 1.28
30211 55 100 22.75 0.713 30311 55 120 31.5 1.63
30212 60 110 23.75 0.904 30312 60 130 33.5 1.99
30213 65 120 24.75 1.13 30313 65 140 36 2.44
30214 70 125 26.25 1.26 30314 70 150 38 2.98
30215 75 130 27.25 1.36 30315 75 160 40 3.57
                   
Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T KG   d D T KG
32203 17 40 17.25 0.102 32304 20 52 22.25 0.23
32204 20 47 19.25 0.16 32305 25 62 25.25 0.368
32205 25 52 19.25 0.187 32306 30 72 28.75 0.562
32206 30 62 21.25 0.287 32307 35 80 32.75 0.763
32207 35 72 24.25 0.445 32308 40 90 35.25 1.04
32208 40 80 24.75 0.532 32309 45 100 38.25 1.4
32209 45 85 24.75 0.573 32310 50 110 42.25 1.89
32210 50 90 24.75 0.626 32311 55 120 45.5 2.37
32211 55 100 26.75 0.853 32312 60 130 48.5 2.9
32212 60 110 29.75 1.17 32313 65 140 51 3.51
32213 65 120 32.75 1.55 32314 70 150 54 4.34
32214 70 125 33.25 1.64 32315 75 160 58 5.37
32215 75 130 33.25 1.74 32316 80 170 61.5 6.38
                   
Bearing No. Dimensions(mm) Weight Bearing No. Dimensions(mm) Weight
  d D T KG   d D T KG
32004X 20 42 15 0.095 33005 25 47 17 0.129
32005X 25 47 15 0.11 33006 30 55 20 0.201
32006X 30 55 17 0.17 33007 35 62 21 0.25
32007X 35 62 18 0.224 33008 40 68 22 0.306
32008X 40 68 19 0.267 33009 45 75 24 0.398
32009X 45 75 20 0.337 33010 50 80 24 0.433
32010X 50 80 20 0.366 33011 55 90 27 0.651
32011X 55 90 23 0.551 33012 60 95 27 0.691
32012X 60 95 23 0.584 33013 65 100 27 0.732
32013X 65 100 23 0.62 33014 70 110 31 1.07
32014X 70 110 25 0.839 33015 75 115 31 1.12
32015X 75 115 25 0.872 33016 80 125 36 1.63

Choosing the Right Ball Bearing for Your Application

When choosing a Ball Bearing, there are several things to consider. These factors include: the size, lubricant type, presence of corrosive agents, stray electrical currents, and more. It can be challenging to choose the right type, size, and type of ball bearing for your application. You should also carefully calculate the loads to determine the right size. Here are some tips for choosing the right Ball Bearing for your application.

Single-row

The single-row ball bearing is one of the most popular types of bearings. The inner and outer ring are designed with raceway grooves that are shaped slightly larger than the balls. This type of bearing has a low torque and can handle high-speed applications with minimal power loss. The radial dimensions of single-row ball bearings also vary, so it is possible to find one that fits your specific application. Besides the above-mentioned advantages, single-row ball bearings are also available with varying grease levels and are widely applicable to applications where the space is limited.
Single-row ball bearings are also called angular-contact ball bearings. Because of their single-row design, they are not separable and can accommodate a high-speed, heavy-duty application. Single-row angular-contact ball bearings can only handle axial load in one direction, and they must be installed in pairs for pure radial loads. Single-row ball bearings are a popular type of rolling bearings and can be used for a wide range of applications.
bearing

Self-aligning

The self-aligning ball bearing was invented by Sven Wingquist, a plant engineer for a textile company in Sweden. While he was responsible for making production as efficient as possible, he soon realized that the machinery he had in place wasn’t working as efficiently as it could. Although ball bearings are great for reducing friction, they were not flexible enough to compensate for misalignments in the machine.
Self-aligning ball bearings have two rows of balls and a common sphered raceway. The inner ring is curved and combines the two rows of balls into one cage. These bearings can tolerate shaft misalignment and compensate for static angular defects. They can be used in simple woodworking machinery, ventilators, and conveying equipment. They are often the preferred choice for applications where shaft alignment is an issue.

Ceramic

A Ceramic ball bearing is a type of high-performance bearing that is available in both full-ceramic and hybrid forms. The main differences between ceramic and steel ball bearings are their construction, lubrication, and mobility. High-quality ceramic ball bearings are durable, and they are ideal for corrosive and high-temperature applications. The material used to create these bearings helps prevent electrolytic corrosion. They are also ideal for reducing the friction and lubrication requirements.
Ceramic balls are harder and less brittle than steel balls, which gives them a higher degree of rigidity. Ceramics also have a higher hardness, with a hardness of Rc75-80 compared to Rc58-64 for steel balls. Their high compressive strength is approximately 5 to 7 times greater than steel. In addition, they have a very low coefficient of friction, which allows them to spin at higher speeds and with less friction. This increases their lifespan and durability, and decreases the energy needed to turn cranks.

Steel

Unlike traditional bearings, steel balls have a relatively uniform hardness. Carbon steel, for instance, is 2.1% carbon by weight. According to the American Iron and Steel Institute, copper content must be no more than 0.40% and manganese content should not be more than 1.65 g/cm3. After carbonizing, steel balls undergo a process called sizing, which improves their roundness geometry and hardness.
The main differences between steel ball bearings and ceramic ball bearings can be traced to their different materials. Ceramic balls are made from zirconium dioxide or silicon nitride. Silicon nitride is harder than steel and resists shocks. The result is increased speed and longer service life. Polyoxymethylene acetal (PMMA) bearing balls are known for their stiffness, strength, and tolerance, but are not as common as steel ball bearings.

Plastic

The most popular types of plastic ball bearings are made of polypropylene or PTFE. These bearings are used in applications requiring higher chemical resistance. Polypropylene is a structural polymer that offers excellent physical and chemical properties, including excellent resistance to organic solvents and degreasing agents. Its lightweight, low moisture absorption rate, and good heat resistance make it an excellent choice for high-temperature applications. However, plastic bearings are not without their drawbacks, especially when operating at very high temperatures or under heavy loads.
Compared to metal bearings, plastic ball-bearings do not require lubrication. They also are highly corrosion-resistant, making them an excellent choice for wash-down applications. They are also post-, autoclave-, and gamma sterilizable. Many conventional steel ball-bearings cannot handle the high temperatures of food processing or swimming pools. In addition to high temperature applications, plastic ball bearings are resistant to chemicals, including chlorine.
bearing

Glass

Plastic sliding bearings are molded bearings made of engineering plastic. With self-lubricating modification technology, these bearings can be produced by injection molding of plastic beads. They are widely used in various industries such as office equipment, fitness and automotive equipment. In addition to plastic bearings, glass balls are used in a variety of other applications, including medical equipment. Glass ball bearings have excellent corrosion resistance, excellent mechanical properties, and are electrically insulators.
Plastic ball bearings are made of all-plastic races and cages. These bearings are suitable for applications that are exposed to acids and alkalis. Because they are cheaper than glass balls, plastic ball bearings are popular in chemical-exposed environments. Stainless steel balls are also resistant to heat and corrosion. But the main disadvantage of plastic ball bearings is that they are not as strong as glass balls. So, if weight and noise is your main concern, consider using plastic balls instead.

Miniature

The global miniature ball bearing market is expected to reach US$ 2.39 Billion by 2027, at a CAGR of 7.2%. Growth in the region is attributed to technological advancement and government initiatives. Countries such as India and China are attracting FDIs and emphasizing the establishment of a global manufacturing hub. This is boosting the market for miniature ball bearings. The miniscule ball bearings are manufactured in small quantities and are very small.
Some manufacturers produce miniature ball bearings in different materials and designs. Chrome steel is the most popular material for miniature ball bearings because of its high load capacity, low noise properties, and lower cost. But the cost of stainless steel miniature bearings is low, since the amount of steel used is minimal. Stainless steel miniature bearings are the smallest in size. Therefore, you can choose stainless steel mini ball bearings for high-speed applications.

Angular-contact

Angular-contact ball bearings have three components: a cage, inner ring, and balls. Angular-contact ball bearings can support high axial and radial loads. Various design and manufacturing attributes make angular-contact ball bearings suitable for a variety of applications. Some features of this bearing type include a special lubricant, different cage materials, and different coatings.
The size of an angular-contact ball bearing is determined by the design units: outer ring width, axial load, and radial load. Depending on the type of application, an angular-contact ball bearing may be manufactured in double-row, triple-row, or quadruple-row configurations. Angular contact ball bearings can be classified according to their design units, which range from metric to imperial. A higher ABEC number means tighter tolerances. To determine the tolerance equivalent of a particular bearing, consult a standard Angular-contact ball bearing table.
Angular-contact ball bearings feature high and low-shoulder configurations. They have two-dimensional races that accommodate axial and radial loads. They are available in self-retaining units with solid inner and outer rings, and ball and cage assemblies. Cages made of cast and wrought brass are the most popular, but lightweight phenolic cages are also available. The latter is a better choice because it doesn’t absorb oil and has lower rolling friction.
bearing

Materials

When it comes to the construction of a ball bearing, high-quality raw materials are a crucial component. These materials not only affect the overall quality of a ball bearing, but also influence the cost. That’s why you should pay close attention to raw material quality. In addition to that, raw materials should be tested several times before the manufacturing process to ensure quality. Read on for some information about the different types of materials used to make ball bearings.
Steel is the most common material for ball bearings. Most ball bearings contain stainless steel balls, which are remarkably corrosion-resistant. They are also resistant to saltwater and alkalis. However, stainless steel balls are heavier than plastic ones, and they are also magnetic, which may be a drawback in some applications. If you’re looking for a metal-free option, glass balls are the way to go. They’re sturdy, lightweight, and resistant to a wide range of chemicals.

China Koyo Timken NTN NSK Original Taper Tapered Roller Bearing 30202 30203 30204 30205 30206 30207 30208 30209 30210 30211 30212 30213 30214 30215 30311 31311     bearing bronzeChina Koyo Timken NTN NSK Original Taper Tapered Roller Bearing 30202 30203 30204 30205 30206 30207 30208 30209 30210 30211 30212 30213 30214 30215 30311 31311     bearing bronze
editor by czh 2022-11-28

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