Product Description

Features

The bearing is a separable bearing, and the inner ring assembly can be installed separately from the tapered outer ring (outer ring);
The outer ring and inner components are 100% interchangeable;
The double-row and four-row bearing clearances have been given according to the user’s requirements when the product leaves the factory;
It is especially suitable for bearing large CZPT (radial and axial) loads.
The greater the contact angle, the greater the applicability of the bearing to withstand axial loads.
 

Product Description

Tapered roller bearings are divided into different structural types such as single-row, double-row and four-row tapered roller bearings according to the number of rows of rollers installed.

Four row tapered roller bearings are tapered roller bearings with four-row rollers installed. The bearing with this structure has a large bearing capacity, and can bear the combined radial and axial loads mainly based on radial loads at the same time. Its radial bearing capacity is about 2.5 to 3.5 times that of the single row tapered roller bearing.

Due to structural limitations, the limit speed of four row tapered roller bearings is relatively low compared to four row cylindrical roller bearings. This type of bearing can withstand axial loads in both directions, so it can be used as a bidirectional thrust bearing.

Advantages

Super precision / High speed / Low torque /Super sound-off / Long life / Low friction

Main applications

Automobile, rolling mill, mining, metallurgy, plastic machinery and other industries.

Product Parameters

 

          Tangent of the contact Angle The inner ring locates the step Outer ring positioning step Basic rated dynamic load Basic static load rating Limit speed (fat) Limit speed (oil) Bearing No.  
d D T B C r da Da Cr C0r nlim nlim
/mm /mm /mm /mm /mm /mm /mm /mm /kN /kN /r•min-1 /r•min-1
15 35 11.75 11 10 0.6 0.23 20 30 35712
15 42 14.25 13 11 1 0.19 21 36 22.8 21.5 9000 12000 30302
17 40 13.25 12 11 1 0.23 23 34 20.8 21.8 9000 12000 35713
17 40 17.25 16 14 1 0.21 23 34 32203
17 47 15.25 14 12 1 0.19 23 41 28.2 27.2 8500 11000 30303
17 47 20.25 19 16 1 0.19 23 41 35.2 36.2 8500 11000 32303
20 37 12 12 9 0.3 0.21 22.4 34.6 13.2 17.5 9500 13000 32904
20 42 15 15 12 0.6 0.25 25 37 25 28.2 8500 11000 32004
20 47 15.25 14 12 1 0.23 26 41 28.2 30.5 8000 10000 35714
20 47 19.25 18 15 1 0.22 26 41 32204
20 52 16.25 15 13 1.5 0.2 29 43 33 33.2 7500 9500 30304
20 52 22.25 21 18 1.5 0.2 29 43 42.8 46.2 7500 9500 32304
22 40 12 12 9 0.3 0.21 24.4 37.6 15 20 8500 11000 329/22
22 44 15 15 11.5 0.6 0.26 27 39 26 30.2 8000 10000 320/22
25 42 12 12 9 0.3 0.21 27.4 39.6 16 21 6300 10000 32905
25 47 15 15 11.5 0.6 0.29 30 42 28 34 7500 9500 32005
25 47 17 17 14 0.6 0.19 30 42 32.5 42.5 7500 9500 33005
25 52 16.25 15 13 1 0.25 31 46 32.2 37 7000 9000 35715
25 52 19.25 18 16 1 0.24 31   32205
25 52 22 22 18 1 0.23 31 46 47 55.8 7000 9000 33205
25 62 18.25 17 15 1.5 0.2 34 53 46.8 48 6300 8000 30305
25 62 18.25 17 13 1.5 0.55 34 53 40.5 46 6300 8000 31305
25 62 25.25 24 20 1.5 0.2 34 53 61.5 68.8 6300 8000 32305
28 45 12 12 9 0.3 0.21 30.4 42.6 16.8 22.8 7500 9500 329/28
28 52 16 16 12 1 0.29 34 46 31.5 40.5 6700 8500 320/28
28 58 24 24 19 1 0.23 34 52 58 68.2 6300 8000 332/28
30 47 12 12 9 0.3 0.21 32.4 44.6 17 23.2 7000 9000 32906
30 55 17 17 13 1 0.29 36 49 35.8 46.8 6300 8000 32006
30 55 20 20 16 1 0.19 36 49 43.8 58.8 6300 8000 33006
30 62 17.25 16 14 1 0.25 36 56 43.2 50.5 6000 7500 35716
30 62 21.25 20 17 1 0.25 36 56 51.8 63.8 6000 7500 32206
30 62 25 25 19.5 1 0.23 36 56 63.8 75.5 6000 7500 33206
30 72 20.75 19 16 1.5 0.21 39 63 59 63 5600 7000 30306
30 72 20.75 19 14 1.5 0.55 39 63 52.5 60.5 5600 7000 31306
30 72 28.75 27 23 1.5 0.21 39 63 81.5 96.5 5600 7000 32306
32 52 14 14 10 0.6 0.21 37 47 23.8 32.5 6300 8000 329/32
32 58 17 17 13 1 0.3 38 52 36.5 49.2 6000 7500 320/32
32 65 18.25 17 15 1 0.25 38 59 302/32
32 65 26 26 20.5 1 0.23 38 59 68.8 82.2 5600 7000 332/32
35 55 14 14 11.5 0.6 0.19 40 50 25.8 34.8 6000 7500 32907
35 62 18 18 14 1 0.3 41 56 43.2 59.2 5600 7000 32007
35 62 21 21 17 1 0.2 41 56 46.8 63.2 5600 7000 33007
35 72 24.25 23 19 1.5 0.25 44 63 70.5 89.5 5300 6700 32207
35 72 28 28 22 1.5 0.24 44 63 82.5 102 5300 6700 33207
35 72 18.25 17 15 1.5 0.25 44 63 54.2 63.5 5300 6700 35717
35 80 22.75 21 18 2 0.21 45 70 75.2 82.5 5000 6300 30307
35 80 22.75 21 15 2 0.55 45 70 65.8 76.8 5000 6300 31307
35 80 32.75 31 25 2 0.21 45 70 99 118 5000 6300 32307
40 62 15 15 12 0.6 0.19 45 57 31.5 46 5600 7000 32908
40 68 19 19 14.5 1 0.26 46 62 51.8 71 5300 6700 32008
40 68 22 22 18 1 0.19 46 62 60.2 79.5 5300 6700 33008
40 75 26 26 20.5 1.5 0.24 49 66 84.8 110 5000 6300 33108
40 80 19.75 18 16 1.5 0.25 49 71 63 74 5000 6300 35718
40 80 24.75 23 19 1.5 0.25 49 71 77.8 97.2 5000 6300 32208
40 80 32 32 25 1.5 0.24 49 71 105 135 5000 6300 33208
40 90 25.25 23 20 2 0.23 50 80 90.8 108 4500 5600 30308
40 90 25.25 23 17 2 0.55 50 80 81.5 96.5 4500 5600 31308
40 90 35.25 33 27 2 0.23 50 80 115 148 4500 5600 32308
45 68 15 15 12 0.6 0.21 50 63 32 48.5 5300 6700 32909
45 75 20 20 15.5 0.6 0.26 50 70 58.5 81.5 5000 6300 32009
45 75 24 24 19 1 0.2 51 69 72.5 100 5000 6300 33009
45 80 26 26 20.5 1.5 0.26 54 71 87 118 4500 5600 33109
45 85 20.75 19 16 1.5 0.27 54 76 67.8 83.5 4500 5600 35719
45 85 24.75 23 19 1.5 0.27 54 76 80.8 105 4500 5600 32209
45 85 32 32 25 1.5 0.26 54 76 110 145 4500 5600 33209
45 100 27.25 25 22 2 0.23 55 90 108 130 4000 5000 30309
45 100 27.25 25 18 2 0.55 55 90 95.5 115 4000 5000 31309
45 100 38.25 36 30 2 0.23 55 90 145 188 4000 5000 32309

This parameter table is not complete, please contact us for details

Company Profile

ZheJiang CZPT Machinery Co., Ltd, Xihu (West Lake) Dis. High-precision Bearings Co., Ltd belongs to CZPT group. It is located in Industrial Development Zone of Liao-cheng city, which is bearings manufacturing base in China. We have been specialized in the production of auto parts, bearings and retainers since year 1986.

Our factory covers an area of 120,000 sq.m, with a construction area of 66,000 sq.m. There are more than 600 employees, 50 management personnel, 80 technical engineers and 60 quality inspectors. We are famous manufacturer group for our strict quality control system and hard-working team.

There are more than 40 sets of high-precision mold processing equipment, 150 sets of various CNC lathes, 200 sets of white dynamic grinding machines, 120 sets of stamping equipment, 16 sets of special demagnetization machines, 10 sets of high-pressure spray cleaning machines, 6 sets ultrasonic cleaning machines and 6 automatic bearing grinding lines. They are also equipped with advanced hardness tester, length measuring instrument, sine instrument, spectrometer, infrared carbon and sulfur analyzer, CZPT hardness tester, roughness profiler, electronic tensile testing machine, metallographic microscope, projection coordinate instrument, roundness instrument, ABLT-2 life testing machine, three-coordinate testing machine and so on. We are ready to provide customers with high-quality precision bearing products.

Our company passed ISO9001, ISO/TS16949 and IATF16949 quality management system. Our products are CE / SGS certified. Through introducing world-leading technology and bring together domestic high-tech talents, it ensures our rapid growth and competitive advantages.

Sincerely wish you visit our factory!

FAQ

Q1: Do you provide samples? Is it free or extra?

Yes, we can provide a small amount of free samples. Do you mind paying the freight?

Q2: Can you accept OEM or non-standard Bearings ?

Any requirement for non-standard roller bearings is easily fulfilled by us due to our engineers’ rich experience.

Q3: What is your latest delivery time?

Most orders will be shipped within 7-15 days of payment  received.

Q4:Does your company have quality assurance?

Yes, for 2 years.

Q5:Which payment method does your company support?

T/T is best, but we can also accept L/C.

Q6:How to contact us quickly?

Please send us an inquiry or message and leave your other contact information, such as phone number,   or account, we will contact you as soon as possible and provide the detailed information.

 

 

Rolling Body: Roller Bearings
The Number of Rows: Four
Outer Dimension: Medium and Large(120-190mm)
Material: Bearing Steel
Spherical: Aligning Bearings
Load Direction: Radial Bearing
Samples:
US$ 2/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

bearing

Types of Ball Bearings

Modern ball bearing configurations have different materials and geometries to meet the demands of different working environments and applications. There are different types of ball bearings: single row deep groove, double-row deep groove, angular contact ball bearing, thrust, and self-aligning. Let us look at the differences between each type and learn why they are important for various purposes. Listed below are some of the most common types of ball bearings.

Miniature bearings

Although miniature ball bearings are a popular choice for small mechanical components, they are not without their challenges. They must be properly lubricated and stored in clean rooms. A strand of hair could ruin a miniature bearing. Fortunately, manufacturers offer lubrication services and a “Clean Room” for customers to store their miniature bearings safely. Read on to learn more about these small bearings and how they can help you.
The size of a miniature ball bearing can vary significantly, but most types of these devices are available in sizes ranging from.040 inch to one eighth of an inch. Whether you need a small ball bearing for a miniature car or a tiny instrument, a miniature bearing can save space while still offering high performance. Many of these bearings are shielded to prevent dirt from entering and leakage of lubricant. They can be flanged or unflanged, and some miniature ball bearings have extended inner rings that are designed for easy plate mounting.
Miniature ball bearings are commonly made from stainless steel or chrome steel. Both metals have their advantages. Stainless steel is the most popular material for ball bearings, which allows for a high load capacity while being quiet. Because stainless steel is relatively inexpensive, many small instrument bearings are made entirely of stainless steel. The difference in price is minimal, as the amount of steel is relatively small. Stainless steel miniature bearings are the smallest and lightest of all types of miniature ball bearings.

Self-aligning ball bearings

In the simplest terms, self-aligning ball bearings are ball bearings with flex shafts. If you’re looking for a ball bearing with a high degree of precision, you’ll want to choose one with a flex shaft, which means it can adjust to the proper orientation of the bearing’s flex shaft. Ball bearings with flex shafts are also recommended. But, what are these bearings?
Self-aligning ball bearings are made with two rows of balls and a common sphered raceway on the outer ring. As a result, they can accommodate small errors in shaft alignment and mounting. The CZPT brand is especially suitable for high-speed applications requiring greater running accuracy. The self-alignment mechanism is enabled by the fact that the balls are placed in two rows on either side of the sphered raceway in the outer ring. These two rows of balls also promote reduced friction and wear.
Another type of self-aligning ball bearings is a double-row design. They feature a common sphered raceway on the outer ring, a hollow spherical ring, and a cage that rotates relative to it. A self-aligning ball bearing is used in applications where shaft misalignment is a problem, such as conveying equipment. They are also used in simple woodworking machinery and ventilators.

Ceramic ball bearings

Ceramic ball bearings have several advantages over steel or metal bearings. These include increased acceleration capability, reduced friction, improved wear-resistance, and higher speeds. The United States holds the leading position in the global ceramic ball bearings market thanks to a rebounding motor vehicle production and healthy fixed investment environment. In the United States, there are three primary markets for ceramic ball bearings: healthcare, automotive, and aerospace. Here are the main benefits of ceramic ball bearings:
Hybrid ball bearings are also available. Hybrid bearings feature traditional metal rings and silicon nitride (ceramic) balls. Hybrid bearings offer important performance advantages over all-steel bearings, and they are more affordable. However, full ceramic ball bearings have all ceramic parts, and are best suited for machines that require high precision. These types of bearings also resist corrosion and wear.
Compared to steel ball bearings, ceramic balls are lighter than steel. They are also less dense, which means less friction and therefore less heat. Additionally, ceramic balls operate at higher speeds than steel balls, which increases their durability and longevity. But they are still not as strong as steel bearings. And because of their reduced density, they are much cheaper to manufacture. Therefore, they are an excellent choice for many applications. You can expect them to last much longer than steel bearings.

Steel carbon ball bearings

High precision G25 ball bearings are made of the highest grade chrome steel and hot forged from bar stock. Statistical process control and exacting atmospheres help ensure uniform hardness and microstructure. Moreover, these bearings are of the highest quality, with fine surface finish and a tight tolerance. This makes them the most widely used and reliable choice for industrial and automotive applications. However, there are some considerations that should be taken into account before acquiring a steel carbon ball bearing.
Generally, AFBMA grade 200 is the standard hardness specification for this material. AFBMA grade 100 can also be obtained with great difficulty. Despite the high hardness of steel carbon ball bearings, their outer surface is just a thin hardened shell, so a special micro hardness test is needed to evaluate them. In addition to the hardness, steel balls are easily machined and ground. Some manufacturers even offer stainless steel ball bearings and ball sets.
Another factor that makes steel carbon ball bearings so valuable is their precision. They can give precise measurements, which makes them ideal for low and medium-speed applications. Due to their high precision and durability, steel carbon ball bearings can be used in many applications, from conveyor machines to roller skates. However, you should be aware that the material used to produce these bearings is not suitable for applications in which they are exposed to water and gases. Further, they are also noisy and heavy, and must be installed properly in a manufacturing environment.

Stainless steel ball bearings

bearing
Stainless steel ball bearings are made from a high-quality type of stainless steel, 440C, which offers optimal corrosion and abrasion resistance. These bearings are also durable and rust-free, and are suitable for a variety of applications. Among others, stainless steel ball bearings are used in beverage and food processing plants, pharmaceuticals, pulp and paper mills, marine environments, and freezers.
Stainless steel bearings are available in various grades. For example, AISI 440C offers corrosion resistance, while the DD400 is specifically designed for marine applications. Both types of stainless steel are available in different forms, including open, shielded, and sealed. Stainless steel ball bearings can also be custom-made, as BL is known for producing customized bearings. There are also other materials that are available.
AISI type 316 stainless steel balls are ideal for marine applications and food processing. They have excellent resistance to most organic materials and are also used in medical devices and dispenser pumps. They are also strong enough to resist many petroleum products and are widely used in medical equipment and cosmetic applications. In addition, stainless steel balls can be plated to provide an additional layer of protection against chemicals. To understand how they differ, let’s take a look at some common types of stainless steel ball bearings.

Stainless steel

Stainless steel ball bearings can be used in various applications. Besides being corrosion resistant, they also last longer thanks to the Molded-Oil lubrication technology. Stainless steel ball bearings are clean units, which saves time and money in terms of maintenance, replacement, and downtime. But what are the advantages of stainless steel ball bearings? Let us discuss these benefits. Also, we’ll discuss their advantages and disadvantages.
Stainless steel ball bearings offer notable advantages, including corrosion resistance, increased strength, and improved stability under high temperatures. These qualities make them the ideal choice for special circumstances and demanding environments. However, you should be careful when choosing stainless steel bearings. There are several different types of stainless steel. Here’s a brief look at what makes them the best choice. And remember: Stainless steels are also recyclable. In fact, they can be recycled indefinitely.
They’re made from chrome alloy electric furnace steel, which is hardened for optimum service life and strength. They have the highest surface finish and dimensional accuracy. Advanced heat-treating processes increase their strength and anti-cracking abilities. And thanks to their unique materials, they’re corrosion-resistant. As a result, they’re more durable than other types of bearings. And since they’re made with a high-quality steel, you’ll save money in the long run.

Plastic ball bearings

bearing
Plastic ball bearings were developed to meet the specific needs of applications where standard steel bearings would fail. Steel and 440C stainless steel are both susceptible to rusting when exposed to water, making them poor choices for applications involving food processing, swimming pools, and medical equipment. In addition to this, the plastic material is able to dampen vibrations and make the bearing virtually silent. Here’s what makes plastic ball bearings so great for these applications.
Plastic ball bearings are lightweight, corrosion-resistant, and offer a long service life. In addition to their low price, they can be easily cleaned and are incredibly durable. Motion plastics specialist igus has recently expanded its range of xiros polymer grooved ball bearings. These bearings are also FDA-compliant, lubricant-free, electrically insulating, and resistant to both temperature and media.
Plastic bearings are often mounted into other components like wheels, pulleys, and housings. In this way, the inner ring is essentially a profile of the pulley’s profile, and the outer ring is a shaft or fixing clip. The result is seamless integration of the bearing and the surrounding parts, which reduces the overall assembly time and costs. You can also use multiple plastic ball bearings in one application for more options.

China Best Sales Four Row Tapered Roller Bearing   bearing airChina Best Sales Four Row Tapered Roller Bearing   bearing air
editor by CX 2023-04-20