What is the Difference Between DE and NDE Bearing?

The floating end of the motor is also called the free end, which is relative to the fixed end; in general, the free end is selected at the non-drive end, but the motor load requirements are higher, and the axial matching size requirements with the load equipment are not very high. In this case, the free end will be selected as the drive end.

When the motor bearing support system is a double fulcrum and double bearing structure, the drive end is also used as the free end when the radial load is large. Especially for low-voltage, high-power and high-voltage motors, the cylindrical roller bearing at the free end can meet the radial load requirements. Large load requirements.

The rollers and raceways of cylindrical roller bearings are in line contact or under-line contact. The radial load capacity is large. It is more suitable for bearing heavy loads and impact loads. The inner ring or outer ring can be separated for easy installation and disassembly. This series of bearings has a small friction coefficient and is suitable for operating conditions with high speed and limit speed close to deep groove ball bearings. The more commonly used N-type and NU-type cylindrical roller bearings in motors can move axially between the inner and outer rings of the bearing, which can adapt to changes in the relative position of the shaft and the housing caused by thermal expansion or installation errors, and can be used as a free end support. However, the bearing has higher requirements for the machining of the shaft or the bearing chamber hole, and the relative deviation of the inner and outer ring axes after the bearing is installed must be strictly controlled to avoid contact stress concentration.

Insulated bearing for motor

Compared with the fixed-end bearing, in order to meet the axial displacement requirements of the rotor part during the operation of the motor, the axial clearance requirements of the outer ring of the bearing and the inner and outer cover of the bearing are different according to the selection of the bearing.

(1) When the free end adopts a bearing with separable inner and outer rings, for the two-bearing structure motor, the fixed end is selected at the non-driving end; the outer ring of the fixed end and the free end bearing and the inner and outer cover of the bearing are axially free of gaps Cooperate.

(2)When a non-separable bearing is used at the free end, that is, the relatively common two ends of small and medium-sized motors are ball bearing structures. In view of the impact on the installation accuracy of the drag equipment, the drive end is used as the fixed end, and the inner ring of the free end bearing should be limited There is a gap between the outer ring and the stop of the inner and outer cover of the bearing; at the same time, in order to ensure the axial matching displacement requirement during the operation of the motor, the radial matching between the outer ring of the bearing and the bearing chamber is not easy to be too tight. When there is no obvious difference between the fixed end and the free end of the motor, the matching relationship is in accordance with the principles in the previous issue of “Selection and Matching Relationship Requirements for Motor Fixed End Bearings”.

structure of insulated bearing in motor

Insulated bearings are mainly used in motor products. Its use is determined according to the power state of the motor. Normal grid power supply has no high-frequency voltage and current components. Generally, insulated bearings are not used. Only high-voltage motors and large motors such as 400 and above are used.

But now the variable frequency power supply power supply, because the quality of the power supply contains a lot of high-frequency components, which causes the motor shaft current to increase, so this issue should be considered for specifications above 400KW, and even the smaller specifications should also consider installing insulation Bearings according to the usage conditions. such as the main motors used in electric vehicles and electric rail locomotives, are generally about 100KW, and electrical insulated bearings must be used (or other insulation structures are used to ensure that the shaft current does not flow).

With the development of society and the progress of industrial technology, more and more equipment and application scenarios have stricter  requirements on the service life, noise level, and stability of bearings. As the most widely used power output device in industry, the motor is the most widely used power output device. Stability and service life play a particularly critical role in the application of equipment.


In the actual production and processing process, due to the actual integration of customers or production resources, especially the repair process of the motor, the substitution of bearings will inevitably occur. The more common one is the interchange of deep groove ball bearings and cylindrical roller bearings. , Especially when the radial load requirements are high, the deep groove ball bearing is often chosen to be replaced with a cylindrical roller bearing. If this situation exists, the conformity of the axial and radial matching relationship between the fixed end and the free end bearing must be considered .


Reprinted source:https://www.electricallyinsulatedbearings.com/What-Is-The-Difference-between-DE-And-NDE-Bearing-id3120599.html

Schaeffler acquires BEGA International B.V.

On August 4, 2021, Schaeffler announced the acquisition of BEGA International B.V., a leading manufacturer of special tools for mounting and dismounting rolling bearings.

This acquisition is another important move for Schaeffler to continuously expand its bearing service product portfolio throughout its life cycle.

Connecting BEGA’s intelligent maintenance tools to the industrial IoT platform dedicated to the Schaeffler OPTIME condition monitoring system can open up new application potential.

Customers will also benefit from this acquisition. All customer service-related applications will adopt a unified interface, which improves the user experience throughout the bearing life cycle, including bearing installation to monitoring, maintenance and repair.

In addition, customers and partners can not only obtain one-stop bearing maintenance and monitoring solutions and services, but also obtain various repair and maintenance solutions more conveniently.

Rauli Hantikainen, Head of Industry 4.0 Strategy Business of Schaeffler Group, said: “Industry 4.0 is of great strategic significance to Schaeffler. Our goal is to become the partner of choice for preventive and proactive maintenance solutions. Through the acquisition of BEGA Company, we can provide customers with full life cycle services and solutions for bearings and other drive products.”

Henk Van Essen, the current CEO of BEGA International, said: “Through this partnership, Schaeffler and BEGA will become one of the industry’s leading maintenance solution providers. At the same time, our goal is to become one of the most innovative equipment suppliers.” Henk Van Essen will continue to serve as the company’s CEO after the acquisition.

Schaeffler continues to expand its product portfolio and is committed to becoming the customer’s preferred technology partner through innovation, agility and efficiency.

As part of the company’s strategic direction, Schaeffler is actively expanding its asset lifecycle management products and services. Schaeffler will continue to advance toward its goals under the guidance of the “2025 Strategic Plan”.

About BEGA International

BEGA was founded in 1978 and is headquartered in Wassen, the Netherlands. It is a professional company that manufactures and distributes bearing and drive component installation and removal tools.

BEGA’s users are mainly the production and maintenance departments of MRO and OEM companies. BEGA’s products are exported to more than 60 countries and provide customized solutions for many industries such as wind energy, railways, mining and steel.

BEAG’s induction heater can reduce energy consumption during the bearing installation and disassembly process, and shorten the installation time. Induction heating does not require fossil fuels such as oil and gas, which is environmentally friendly and safe.

RBC Bearings Reached an Agreement to Acquire Dodge Mounted Bearings

On July 27, ABB announced the signing of a definitive agreement to sell its mechanical power transmission business unit (Dodge) to RBC Bearing Company for US$2.9 billion in cash.

The transaction will create a highly engineered, performance-oriented bearing and motion control component manufacturing company. The transaction is expected to be completed before the end of 2021, subject to completion conditions including regulatory approval.

ABB CEO Bjoern Rosengren announced in November last year that ABB will explore Dodge and its options for turbocharging units and power conversion businesses.

Investors hope that his strategy will solve ABB Group’s structural problems and improve profitability. Dodge’s products include mounting bearings, enclosed transmissions and bushings for industrial applications. As part of the acquisition of Baldor Electric Co. in 2011, ABB acquired the business.

China bearing manufacturer


For more than 140 years, Dodge Bearing has always been the market and technology leader in the fields of Mounted bearings, gearboxes and mechanical power transmission components, providing a very wide range of mechanical power transmission product portfolios on the market, covering various industrial fields, such as mining, aggregates and Cement, storage and food and beverage industries.

Dodge has approximately 1,500 employees worldwide. As of June 30, Dodge had achieved sales revenue of approximately US$600 million in the past 12 months, of which more than 90% came from the Americas, and its operating profit margin before interest, tax and amortization was close to 23%. Dodge has six production bases, five of which are in the United States and one in China. Its headquarter is located in Greenville, South Carolina. The head of this business unit is Roger Costa.

Earlier news reported that both Schaeffler and Timken were considering bidding for ABB’s mechanical power transmission business, but they were eventually acquired by the Royal Bank of Canada Bearing Company (RBC Bearing Inc.).

ABB Group CEO Robin Ang said: “We are very happy to find an outstanding new ownership for Dodge-RBC Bearings, where we will continue to write exciting development chapters.


Mounted bearing application


This transaction will further strengthen ABB’s balance sheet. Based on the priority of capital allocation, we plan to invest the proceeds of the transaction in organic growth first, pay a continuously growing dividend per share, and conduct value-based creative acquisitions. Next, we will announce a possible listing plan for exiting the turbocharging business and electric transportation business at an appropriate time. ”

Dr. Michael J. Hartnett, Chairman, President and CEO of RBC Bearings, said: “Today, we are very pleased to announce that ABB and RBC Bearings have signed a Dodge acquisition agreement. This merger will enhance the strength, business layout and customer coverage of RBC Bearings. At the same time, it helps us enter Dodge’s attractive end market. Our two businesses are highly complementary. Dodge will bring new products, new end markets and larger organizations. The combined company will have a diversified customer base and The vast geographical layout is in a favorable position in the aerospace, defense and industrial markets. We look forward to the excellent team of Dodge to join RBC bearings.”

ABB expects to include approximately US$2.2 billion in non-operating pre-tax book income through the sale of Dodge, and estimates that cash tax expenditures related to the transaction are approximately US$400 million.


From: https://www.electricallyinsulatedbearings.com/RBC-Bearings-Reached-an-Agreement-to-Acquire-Dodge-Mounted-Bearings-id3747129.html

INA Standard F-49285 Bearing for Planetary Gear Box

Designation: F-49285

Dimension: 40×61.74×32mm

Weight: 0.4kg

Type: Cylindrical Roller Bearing, Without outer ring

Brand: INA, CoatMaster, EASIER, C&U

Application: Planetary gear transmission

Planetary gear transmission is a transmission that uses planetary gear mechanism to achieve speed change. It is usually installed behind the torque converter to form a hydraulic automatic transmission. The planetary gear mechanism gets its name because it is similar to the solar system. In its center is the sun wheel. Around the sun wheel are several planet wheels that revolve around it. Between the planet wheels, there is a shared planet carrier. On the outside of the planetary gear, there is a large ring gear.


The design trend of industrial gearboxes is to adopt a smaller form factor to improve their compactness, while continuously increasing the power level of the gearbox, Increasing power density in a very small space also places higher requirements on the bearings used.

Based on the requirements of high load-bearing capacity, small space, safety and reliability, low noise, and easy to follow, we provide targeted bearing solutions.

  1. RSL type single row and double row full complement cylindrical roller bearings without outer ring have high dynamic and static load carrying capacity and very compact radial dimensions
  2. RN type cylindrical roller bearing with cage guide, especially suitable for high speed
  3. KZK series needle roller cage assembly is suitable for high centrifugal force, high acceleration and very high speed

F series cylindrical roller bearing

1 F-212543
2 F-219593
3 F-208098
4 F-208099
5 F-127621
6 F-385328
7 F-229575.1
8 F-208266
9 F-208266.5
10 F-212355.2
11 F-49285
12 F-244026
13 F-554377
14 F-239535
15 F-236487.04
16 F-2439
17 F-2419
18 F-204782
19 F-204781
20 F-227450
21 F-93666.02
22 F-237005
23 F-209297
24 F-507037
25 F-229075.2
26 F-210408
27 F-123243
28 F-217615
29 F-254026
30 F-213617

CoatMaster is the China bearing manufacturer & exporter & supplier, it can supply  INA Standard F-49285 Bearing for Planetary Gear Box, Our large quantity bearing Stock can meet your need with good quality and fast delivery, Also you can find the other type and brand construction machinery bearings, agricultural machinery bearings, spherical roller bearings, cylindrical roller bearings, tapered roller bearings, deep groove ball bearings, thrust roller bearings, mounted ball bearings etc.

Japan Bearing Industry History

Although Japan’s bearing industry started late, its development speed is fast, and in recent years it has become the world’s leading bearing power and power. Japan is a strong country in the production of precision bearings, leading the world in terms of product development, design and manufacturing, technological level, product quality and production equipment.

The development history of Japan’s bearing industry

Pay attention to improving the level of technology and quality

Same as “Made in Japan” synonymous with poor quality and low price, the development of the Japanese bearing industry has also experienced unsatisfactory periods. For example, before 1980, the first choice of bearing manufacturers for the important positions of industrial manufacturing in European and American countries were Timken and FAG, and only Japanese bearings were used in the secondary position.

Later, in the process of developing trade revitalization, Japan gradually paid attention to the technical level and quality level of the development of the bearing industry, and paid great attention to product quality management. With the continuous improvement of product quality level, Japan implemented export inspection exemption policy after 1993. Although Japan has a global open market, it rarely applies foreign bearing brands due to its strong domestic bearing industry. Japanese bearings have good quality and are also based on the support of two technologies.

ONE:  Process equipment and technology;

TWO:  Ultra-cleanliness bearing steel.

In terms of process equipment and technology, Japanese bearing companies pay great attention to it. Automatic production lines, CNC machine tools, and automated machine tools are commonly used in the manufacturing process. Large-scale enterprises extensively independently manufacture important equipment and use this as the core technology. In terms of vibration, noise and abnormal sound, Japan has introduced silent and ultra-quiet bearings. Compared with Japanese bearings, the vibration extreme level of Chinese bearings generally differs by more than 10dB. For example, Japan’s low-noise deep groove ball bearing technology was applied in an automated production line in 1959. The accuracy of the product has been significantly improved, and the price of the product has been greatly reduced.

The country is very concerned

Japan is the country that pays the most attention to the development of the bearing industry in the world. For a long time, Japan has always regarded the bearing industry as a pillar industry such as the foundation for improving people’s lives, the core machinery industry, and the defense industry. After the 1950s, Japan enacted the Electromechanical and Machinery Promotion Law, which paid special attention to and supported the development of the bearing industry. Among them, the creation of a scientific production system, that is, restricting the types of production, organizing the production scale, and dividing the scope of production are very obvious measures. In this way, the development of the bearing industry can be effectively unified, which is conducive to the scale of production. , Centralization and improvement of professionalism.

Pay attention to the division of labor

Japan’s land area is roughly the same as that of my country’s Yunnan Province, but it has more than 30 bearing companies, including the top five bearing companies in the world, and has the world’s largest corporate equivalent density. Despite this, its status has been for decades. However, it is in an “ecological balance”, and it is not the same as that of the bearing companies in European and American countries where there is a very drastic reorganization and merger. In fact, competition among Japanese bearing companies has always existed. However, the focus of their competition is quality and technology, not vicious competition on prices, but joint implementation of monopoly policies on prices. Japanese bearing companies are not only large and powerful, many small and medium-sized bearing companies also have advanced technology and product quality in the global field. In short, one of the powerful tools that the Japanese bearing industry can gain a global competitive advantage is solidarity and mutual assistance and win-win development.

Implement internationalization strategy

In the 1950s and 1960s, Japan imitated and introduced advanced technologies from Europe and the United States through a cooperative technology model and low-cost labor cost advantages, and penetrated a lot of products in the world market. This caused excessive competition and overflowing of second-hand goods. Big trade friction. After nearly two decades of hard work, Japan has established a dominant position in many fields. Not only does its products have low prices, but they also have attentive services, complete functions, and high quality, which puts European and American countries facing very large competitive pressures. Currently, Japan’s five largest bearing companies have set up more than 200 overseas companies, and the sales of international markets account for at least two-thirds of the sales of domestic markets. Japanese bearing companies have continued to optimize and upgrade their overseas construction of branch factories, such as shifting from production based on previous demand to optimal production.

Japan Bearing Company List

NSK: Nippon Seiko Co., Ltd. Founded in the 1920s, it is currently the top three in the world, producing a full range of bearings.

NTN: Toyo Japan. It was established a little later than NSK. Top ten in the world, producing a full range of bearings, automotive bearings

KOYO: Japan Koyo. Top ten in the world, producing a full range of bearings, automotive bearings

NACHI: Fujitsu Co., Ltd. of Japan. Production of industrial robots and drill bits (one of the best in the world). Bearing products account for only a small part.

NMB: Production of miniature bearings. The scale of miniature bearings alone ranks among the top in the world

IKO: Linear motion series, needle roller bearings.

THK: Linear Motion Series

IJK: Precision bearings, miniature bearings, and widened bearings. Currently under NSK

ASAHI: Japan’s Asahi Seiko. Spherical bearing with seat.

FYH: Kobayashi Seiko of Japan. Spherical bearing with seat.

EZO: Miniature bearings, stainless steel bearings, special material bearings.

KYK (production of a full range of bearings),

JNS (Needle Bearing),

Misumi (bearings for toys, ball bearings, needle roller bearings, roller bearings), etc.

Insulated Angular Contact Ball Bearings

CoatMaster has been able to increase reliability and machine uptime by virtually eliminating the damaging effects of stray electric currents. CoatMaster bearing designs The standard range of CoatMaster bearings in the most frequently used sizes and variants are available from stock as

  • single row deep groove ball bearings
  • single row cylindrical roller bearings.
  • single row angular contactball bearings.

The performance data as well as the dimensional and running accuracy of CoatMaster bearings are identical to standard non insulated bearings.

CoatMaster bearings with coated outer ring Bearings with an electrically insulating coating on the external surfaces of the outer ring are the most common CoatMaster bearings. They are identified by the suffix VL0241. Outer ring coated CoatMaster bearings are recommended for medium size motors, that use 7215, 7313 size bearings and larger. For applications where smaller bearings are used, CoatMaster recommends hybrid deep groove ball bearings.


CoatMaster bearings with coated inner ring Bearings with an electrically insulating coating on the external surfaces of the inner ring provide enhanced protection against electric current damage. The enhanced protection results from the increased impedance due to the smaller coated surface area. Bearings with a coated inner ring are identified by the

suffix VL2071 and are recommended for larger size motors (typically from bearing sizes 7226, 7324 sizes and larger), or other applications where the bearings risk being subjected to high shaft voltages.


CoatMaster Electrically Insulated angular contact ball bearings can only bear axial load in one direction. When bearing radial load, additional axial force will be caused. And it can only limit the axial displacement of the shaft or housing in one direction. Angular contact ball bearings have a contact angle of 40 degrees, so they can withstand large axial loads. Angular contact ball bearings are of non-separable design, and the shoulders on both sides of the inner and outer rings are different in height. In order to improve the load capacity of the bearing, the shoulder on one side will be processed lower so that the bearing can be loaded with more steel balls.

Electrically Insulated angular contact ball bearings can withstand larger radial loads, mainly combined radial and axial loads and moment loads, limiting the axial displacement of the shaft on both sides. The tiltability between the inner and outer rings of the double row angular contact ball bearing is mainly used to limit the bidirectional axial displacement of the shaft and the housing. The allowable tilt angle depends on the internal clearance of the bearing, bearing size, internal design and acting on it. The force and moment on the bearing, and the maximum allowable inclination angle should ensure that no excessive additional stress is generated in the bearing. If there is an inclination angle between the inner and outer rings of the bearing, it will affect the life of the bearing, and at the same time cause the bearing’s running accuracy to decrease and the running noise to increase. Double row angular contact ball bearings generally use nylon cages or brass solid cages. Pay attention to the installation of double row angular contact ball bearings. Although the bearing can withstand two-way axial loads, if there is a gap for the ball on one side, care should be taken not to allow the main axial load to pass through the gap on the side of the groove. When the bearing is used, care should be taken to make the side raceway without the ball notch bear the main load.


Electrically Insulated Paired double ball bearings

If it is installed in pairs, the outer rings of a pair of bearings are opposite, that is, the wide end faces the wide end face and the narrow end faces the narrow end face. In this way, additional axial force can be avoided, and the shaft or housing can be restricted to the axial clearance range in both directions.

Because the raceways of the inner and outer rings can have relative displacement on the horizontal axis, they can bear radial load and axial load at the same time—combined load (single row angular contact ball bearings can only bear axial load in one direction, so they usually Install in pairs).

The material of the cage is brass, synthetic resin, etc., which are differentiated according to the type of bearing and the conditions of use.

Angular contact ball bearings are mostly manufactured by foreign bearing manufacturers, and more domestic ones are used in imported equipment such as angular contact ball bearings 3204RS, etc.

The narrow side is outside, the wide side is inside, the other wide side is inside, and the narrow side is outside, which means back-to-back contact.

The accuracy grades of angular contact ball bearings include dimensional tolerances and rotation accuracy. The accuracy from low to high is represented as P0 (normal), P6 (P6X), P5, P4, P2.


Technical features and benefits of Electrically Insulated bearings

  • The coating is applied using a plasmaspray technique. Sophisticated pre- and post- application processes yield an outstanding coating quality.
  • CoatMasterbearings are treated with a unique sealant to guard against humidity

and water from penetrating the coating and reducing its effectiveness.

  • Due to the quality of the application and finishing processes, CoatMasterbearings

provide reliable and consistent insulation, that is virtually insensitive to heat, moisture

and chemicals.

  • CoatMaster can supply values for relevant electric parameters for the bearings (capacitance,

impedance) to optimize the insulating solution for any application.

  • CoatMasterbearings are environmentally friendly.
  • CoatMasterbearings with an outer ring coating are suitable for all types of housings. No additional mounting precautions are necessary

Sealed Spherical Roller Bearing Manufacturer

Sealed spherical roller bearings, as an upgrade of spherical roller bearing technology, more and more manufacturers have begun to produce Sealed Spherical Roller Bearing and have been recognized by the market,

SKF– Exceptional protection and longer life – with sealed SKF Explorer spherical roller bearings

FAG– FAG Sealed Spherical Roller Bearings With reliable protection against contamination

NSK– Long life sealed spherical roller bearings for Conveyor pulley in Mining industry

NTN–Sealed Spherical Roller Bearings

ULTAGE Series Sealed Spherical Roller Bearings (WA Type) are new innovative standard products specifically developed to provide “longer service life”, “higher reliability” and “improved ease of use” required for all industrial machineries.ZKL-NEW FORCE Sealed Spherical Roller Bearings

ZKL–  has developed its first types of Sealed spherical roller bearings. In the current year the range of sealed spherical roller bearings will be extended and the customers will be able to choose the bearings from our new catalogue „ZKL Sealed spherical roller bearings“, which will come out in May this year.

EASIER, ZWZ, TIMKEN, COATMASTER, Sealed spherical roller bearings offer long-life performance, are highly reliable,and promote a clean working environment.

Sealed spherical roller bearing, includes an inner ring and an outer ring, a cage is arranged between the inner ring and the outer ring, and rollers are arranged on both sides of the cage between the inner ring and the outer ring, which is characterized by the inner ring There are end caps for sealing the inner end of the bearing on both sides of the outer ring. The sealed end cover can effectively protect the internal structure of the bearing from external aggressions, prolong the service life of the bearing, and enable the bearing to run for a long time under complex environmental conditions such as high temperature, high pressure, and heavy load.

Special Grease: Heat And pressure resistance are ensured using a special long-life grease

Special Seal:Sealing performance is enhanced by adopting an outward-extending, spring loaded lip seal made of nitrile rubber and is beaded on the outer circumference, which sectures the seal to prevent dislodging.

Symmetric Rollers:Roller and raceway surface areas are designed to prevent edge loading at the contact points under high-load operating conditions.

Special Chamfer: the chamfer configuration of the outer-ring outer bore offers smooth axial movement of the bearing at the free end.


Spherical roller bearings are universally applicable to various machines. The ordinary roller bearing generally includes an inner ring and an outer ring. A cage is arranged between the inner ring and the outer ring. Both sides of the cage are evenly distributed with axial pockets, and the pockets on both sides of the cage are arranged in a cross shape. There are rollers in each pocket, and the rollers are drum-shaped spherical rollers. The inner surface of the outer ring and the corresponding inner ring raceway of the roller are both spherical. A circumferential boss is processed in the middle of the inner surface of the cage, and the inner surface of the circumferential boss and the inner surface of the inner ring are in a contact-like sliding fit, and the inner ring guides the movement of the cage.

However, because spherical rollers are generally used in harsh working conditions, if this ordinary spherical roller bearing is directly installed in the above environment, the inside of the bearing is easily contaminated, which greatly reduces the life of the bearing and affects the equipment. Normal operation.

Sealed spherical roller bearings can be widely used in places with relatively harsh environments, such as steel metallurgy, mining, petrochemicals, papermaking, cement manufacturing and other engineering machinery fields. Sealed end covers are provided to effectively protect The internal structure of the bearing is protected from external aggressions, which prolongs the service life of the bearing and enables the bearing to run for a long time under complicated environmental conditions such as high temperature, high pressure and heavy load.


Designation  (Bore diameter 20mm-45mm) Principal dimensions Basic load ratings Speed ratings
EASIER FAG NSK dynamic static Reference speed Limiting speed
d[mm] D[mm] B [mm] C[kN] C0[kN] [r/min] [r/min]
BS2-2205-2RS/VT143 WS22205-E1-XL-2RSR 25 52 23 49.9 44 6 100
BS2-2206-2RS/VT143 WS22206-E1-XL-2RSR 30 62 25 66.1 60 5 100
BS2-2207-2RS/VT143 WS22207-E1-XL-2RSR 35 72 28 88.8 85 4 300
BS2-2208-2RS/VT143 WS22208-E1-XL-2RSR 40 80 28 98.5 90 3 900
BS2-2208-2RSK/VT143 WS22208-E1-XL-K-2RSR 40 80 28 98.5 90 3 900
BS2-2308-2RS/VT143 WS22308-E1-XL-2RSR 40 90 38 155 140 3 900
BS2-2209-2RS/VT143 WS22209-E1-XL-2RSR 45 85 28 104 98 3 500
BS2-2209-2RSK/VT143 WS22209-E1-XL-K-2RSR 45 85 28 104 98 3 500
BS2-2309-2RS/VT143 WS22309-E1-XL-2RSR 45 100 42 190 183 3 400
BS2-2210-2RS/VT143 WS22210-E1-XL-2RSR 50 90 28 107 108 3 200
BS2-2210-2RSK/VT143 WS22210-E1-XL-K-2RSR 50 90 28 107 108 3 200
BS2-2310-2RS/VT143 WS22310-E1-XL-2RSR 50 110 45 228 224 3 000
BS2-2211-2RS/VT143 WS22211-E1-XL-2RSR 55 100 31 129 127 2 900
BS2-2211-2RSK/VT143 WS22211-E1-XL-K-2RSR 55 100 31 129 127 2 900
BS2-2311-2RS/VT143 WS22311-E1-XL-2RSR 55 120 49 280 280 2 800
BS2-2212-2RS/VT143 WS22212-E1-XL-2RSR 60 110 34 159 166 2 700
BS2-2212-2RSK/VT143 WS22212-E1-XL-K-2RSR 60 110 34 159 166 2 700
BS2-2312-2RS/VT143 WS22312-E1-XL-2RSR 60 130 53 325 335 2 500
24013-2RS5W/VT143 65 100 35 137 173 2 600
BS2-2213-2RS/VT143 WS22213-E1-XL-2RSR 65 120 38 198 216 2 400
BS2-2213-2RSK/VT143 WS22213-E1-XL-K-2RSR 65 120 38 198 216 2 400
BS2-2313-2RS/VT143 WS22313-E1-XL-2RSR 65 140 56 357 360 2 400
BS2-2214-2RS/VT143 WS22214-E1-XL-2RSR 70 125 38 213 228 2 300
BS2-2214-2RSK/VT143 WS22214-E1-XL-K-2RSR 70 125 38 213 228 2 300
BS2-2314-2RS/VT143 WS22314-E1-XL-2RSR 70 150 60 413 430 2 100
24015-2RS5/VT143 75 115 40 181 232 2 300
BS2-2215-2RS/VT143 WS22215-E1-XL-2RSR 75 130 38 217 240 2 200
BS2-2215-2RSK/VT143 WS22215-E1-XL-K-2RSR 75 130 38 217 240 2 200
BS2-2315-2RS/VT143 WS22315-E1-XL-2RSR 75 160 64 462 475 2 100
BS2-2315-2RSK/VT143 WS22315-E1-XL-K-2RSR 75 160 64 462 475 2 100
BS2-2216-2RS/VT143 WS22216-E1-XL-2RSR 80 140 40 243 270 2 000
BS2-2216-2RSK/VT143 WS22216-E1-XL-K-2RSR 80 140 40 243 270 2 000
BS2-2316-2RS/VT143 WS22316-E1-XL-2RSR 80 170 67 516 530 2 000
BS2-2316-2RSK/VT143 WS22316-E1-XL-K-2RSR 80 170 67 516 530 2 000
BS2-2217-2RS/VT143 WS22217-E1-XL-2RSR 85 150 44 291 325 1 900
Designation (Bore diameter 85mm-95mm) Principal dimensions Basic load ratings Speed ratings
EASIER FAG NSK dynamic static Reference speed Limiting speed
d[mm] D[mm] B[mm] C[kN] C0[kN] [r/min] [r/min]
BS2-2217-2RSK/VT143 WS22217-E1-XL-K-2RSR 85 150 44 291 325 1 900
BS2-2218-2RS/VT143 WS22218-E1-XL-2RSR 90 160 48 331 375 1 800
BS2-2218-2RSK/VT143 WS22218-E1-XL-K-2RSR 90 160 48 331 375 1 800
BS2-2318-2RS5/VT143 WS22318-E1-XL-2RSR 90 190 73 637 695 1 700
BS2-2318-2RS5K/VT143 WS22318-E1-XL-K-2RSR 90 190 73 637 695 1 700
BS2-2219-2RS/VT143 WS22219-E1-XL-2RSR 95 170 51 393 450 1 700
24020-2RS5/VT143 100 150 50 296 415 1 700
24120-2RS5/VT143 100 165 65 470 640 1 700
BS2-2220-2RS5/VT143 WS22220-E1-XL-2RSR 100 180 55 433 490 1 600
BS2-2220-2RS5K/VT143 WS22220-E1-XL-K-2RSR 100 180 55 433 490 1 600
23220-2RS/VT143 100 180 60.3 499 600 1 600
23220-2RS5/VT143 100 180 60.3 499 600 1 600
BS2-2320-2CS5/VT143 WS22320-E1-XL-2RSR 100 215 82 847 950 600
BS2-2320-2CS5K/VT143 WS22320-E1-XL-K-2RSR 100 215 82 847 950 600
23022-2RS/VT143 110 170 45 326 440 1 500
24022-2RS5/VT143 110 170 60 438 620 1 600
23122-2CS5/VT143 110 180 56 451 585 800
23122-2CS5K/VT143 110 180 56 451 585 800
24122-2CS5/VT143 24122-BE-XL-2VSR 110 180 69 540 750 630
BS2-2222-2RS5/VT143 WS22222-E1-XL-2RSR 110 200 63 572 640 1 500
BS2-2222-2RS5K/VT143 WS22222-E1-XL-K-2RSR 110 200 63 572 640 1 500
23222-2CS5/VT143 110 200 69.8 627 765 640
23222-2CS5K/VT143 110 200 69.8 627 765 640
23024-2RS5/VT143 120 180 46 367 500 1 400
24024-2CS5/VT143 24024-BE-XL-2VSR 120 180 60 457 670 670
Designation (Bore diameter 120mm-130mm) Principal dimensions Basic load ratings Speed ratings
EASIER FAG NSK dynamic static Reference speed Limiting speed
d[mm] D[mm] B[mm] C[kN] C0[kN] [r/min] [r/min]
23124-2CS5/VT143 120 200 62 535 695 720
24124-2CS5/VT143 24124-BE-XL-2VSR 120 200 80 680 950 560
BS2-2224-2RS5/VT143 WS22224-E1-XL-2RSR 120 215 69 652 765 1 400
BS2-2224-2RS5K/VT143 WS22224-E1-XL-K-2RSR 120 215 69 652 765 1 400
23224-2CS5/VT143 120 215 76 734 930 600
23224-2CS5K/VT143 120 215 76 734 930 600
22324-2CS5/VT143 120 260 86 1 022 1 120 600
22324-2CS5K/VT143 120 260 86 1 022 1 120 600
23026-2CS5/VT143 130 200 52 452 610 800
23026-2CS5K/VT143 130 200 52 452 610 800
24026-2CS5/VT143 24026-BE-XL-2VSR 130 200 69 570 830 600
Designation (Bore diameter 130mm-140mm) Principal dimensions Basic load ratings Speed ratings
EASIER FAG NSK dynamic static Reference speed Limiting speed
d[mm] D[mm] B[mm] C[kN] C0[kN] [r/min] [r/min]
24126-2CS5/VT143 24126-BE-XL-2VSR 130 210 80 701 1 000 530
229750 J/C3R505 130 220 73 640 930 1 600 2 400
BS2-2226-2CS5/VT143 WS22226-E1-XL-2RSR 130 230 75 758 930 700
BS2-2226-2CS5K/VT143 WS22226-E1-XL-K-2RSR 130 230 75 758 930 700
23226-2CS5/VT143 130 230 80 828 1 060 530
23226-2CS5K/VT143 130 230 80 828 1 060 530
22326-2CS5/VT143 130 280 93 1 178 1 320 500
22326-2CS5K/VT143 130 280 93 1 178 1 320 500
23028-2CS5/VT143 140 210 53 485 680 700
23028-2CS5K/VT143 140 210 53 485 680 700
24028-2CS5/VT143 24028-BE-XL-2VSR 140 210 69 601 900 560
Designation (Bore diameter 140mm-150mm) Principal dimensions Basic load ratings Speed ratings
EASIER FAG NSK dynamic static Reference speed Limiting speed
d[mm] D[mm] B[mm] C[kN] C0[kN] [r/min] [r/min]
24128-2CS5/VT143 24128-BE-XL-2VSR 140 225 85 797 1 160 450
24128-2CS5K30/VT143 24128-BE-XL-K-2VSR 140 225 85 797 1 160 450
22228-2CS5/VT143 22228-E1A-XL-2RSR-M 140 250 68 744 900 670
22228-2CS5K/VT143 22228-E1A-XL-K-2RSR-M 140 250 68 744 900 670
23228-2CS5/VT143 140 250 88 963 1 250 480
23228-2CS5K/VT143 140 250 88 963 1 250 480
22328-2CS5/VT143 140 300 102 1 359 1 560 430
22328-2CS5K/VT143 140 300 102 1 359 1 560 430
23030-2CS5/VT143 150 225 56 532 750 670
23030-2CS5K/VT143 150 225 56 532 750 670
24030-2CS5/VT143 24030-BE-XL-2VSR 150 225 75 681 1 040 530
23130-2CS5/VT143 150 250 80 884 1 200 560
23130-2CS5K/VT143 150 250 80 884 1 200 560

Electrically Insulated cylindrical roller bearings

Electrically Insulated cylindrical roller bearings have outer ring coating, inner ring coating and ceramic material rolling elements. Because of the higher cost of using ceramic material rolling elements, in most cases, the inner ring or outer ring 50-200 μm is used. Thick ceramic coating. The first two coatings are plasma spraying method to coat ceramic material on the bearing surface. This coating still maintains its insulation performance in a humid environment. The ceramic material rolling element insulated bearing is the rolling element. Using ceramic materials, it has excellent current resistance capability.

These three methods can make the cylindrical roller bearing achieve the effect of insulation, so that the bearing will not be damaged by current during operation, and it can resist the electric flashover generated under 1000V voltage. The thicker coating can resist the high voltage above 1000V. Discharge.

Electrically insulated bearings can avoid damage caused by electrical corrosion, so compared with ordinary bearings, they can be used in motors to ensure more reliable operation. Compared with other insulation methods, such as shaft or housing insulation, it is more cost-effective and reliable. The outer dimensions and basic technical characteristics of insulated bearings are the same as those of non-insulated bearings, so they can be 100% interchanged.



Normally 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.

Cylindrical Roller Bearings And insulated Cylindrical roller bearings also have many different design as follows

–Single Row Cylindrical Roller Bearings

–Double Row Cylindrical Roller Bearings

–High Capacity Cylindrical Roller Bearings

–Single Row Full Complement Cylindrical Roller Bearings

–Double Row Full Complement Cylindrical Roller Bearings


Designation Principal dimensions Basic load ratings Fatique load limit Speed ratings Weight
Cylindrical roller bearings mm mm mm dynamic static Reference speed Limiting speed kg
d D B C[kN] C0[kN] [r/min] [r/min]
NU 1010 ECP/C3VL0241 50 80 16 46.8 56 6.7 9500 9500 0.27
NU 210 ECM/C3VL0241 50 90 20 73.5 69.5 8.8 8500 9000 0.48
NU 310 ECM/C3VL0241 50 110 27 127 112 15 6700 8000 1.36
NU 1011 ECP/C3VL0241 55 90 18 57.2 69.5 8.3 8500 8500 0.4
NU 1011 ECML/C3VL0241 55 90 18 57.2 69.5 8.3 8500 13000 0.4
NU 211 ECM/C3VL0241 55 100 21 96.5 95 12.2 7500 8000 0.78
NU 311 ECM/C3VL0241 55 120 29 156 143 18.6 6000 7000 1.75
NU 1012 ML/C3VL0241 60 95 18 37.4 44 5.3 8000 13000 0.48
NU 1012 ECP/C3VL0241 60 95 18 58.3 73.5 8.8 8000 8000 0.48
NU 212 ECM/C3VL0241 60 110 22 108 102 13.4 6700 7500 0.1
NU 312 ECM/C3VL0241 60 130 31 173 160 21.2 5600 6700 2.2
NU 1013 ECP/C3VL0241 65 100 18 62.7 81.5 9.8 7500 7500 0.45
NU 213 ECM/C3VL0241 65 120 23 122 118 15.6 6300 6700 1.3
NU 313 ECM/C3VL0241 65 140 33 212 196 25.5 5300 6000 2.63
NU 1014 ECM/C3VL0241 70 110 20 76.5 93 12 7000 7000 0.7
NU 1014 ECP/C3VL0241 70 110 20 76.5 93 12 7000 7000 0.7
NU 214 ECM/C3VL0241 70 125 24 137 137 18 6000 6300 1.4
NU 314 ECM/C3VL0241 70 150 35 236 228 29 4800 5600 3.2
NU 1015 M/C3VL0241 75 115 20 58.3 71 8.5 6700 6700 0.75
NU 215 ECM/C3VL0241 75 130 25 150 156 20.4 5600 6000 1.5
NU 315 ECM/C3VL0241 75 160 37 280 265 33.5 4500 5300 4
NU 315 ECP/VL0241 75 160 37 280 265 33.5 4500 5300 4
NU 1016 ECM/C3VL0241 80 125 22 99 127 16.3 6000 6000 1.05
NU 216 ECM/C3VL0241 80 140 26 160 166 21.2 5300 5600 1.9
NU 316 ECM/C3VL0241 80 170 39 300 290 36 4300 5000 4.6
NU 1017 M/C3VL0241 85 130 22 68.2 86.5 10.8 6000 6000 1.1
NU 217 ECM/C3VL0241 85 150 28 190 200 25 4800 5300 2.3
NU 317 ECM/C3VL0241 85 180 41 340 335 41.5 4000 4800 5.4
NU 1018 M/C3VL0241 90 140 24 80.9 104 12.7 5600 5600 1.4
NU 218 ECM/C3VL0241 90 160 30 208 220 27 4500 5000 2.8
NU 318 ECM/C3VL0241 90 190 43 365 360 43 3800 4500 6.3
NU 1019 ML/C3VL0241 95 145 24 84.2 110 13.2 5300 5300 1.4
NU 219 ECM/C3VL0241 95 170 32 255 265 32.5 4300 4800 2.9
NU 319 ECM/C3VL0241 95 200 45 390 390 46.5 3600 4300 7.3
NU 1020 M/C3VL0241 100 150 24 85.8 114 13.7 5000 5000 1.5
NU 220 ECM/C3VL0241 100 180 34 285 305 36.5 4000 4500 4.05
NU 320 ECM/C3VL0241 100 215 47 450 440 51 3200 3800 8.7
NU 1022 M/C3VL0241 110 170 28 128 166 19.3 4500 4500 2.3
NU 222 ECM/C3VL0241 110 200 38 335 365 42.5 3600 4000 5.7
NU 322 ECM/C3VL0241 110 240 50 530 540 61 3000 3400 12
NU 1024 M/C3VL2071 120 180 28 134 183 20.8 4000 4000 2.7
NU 224 ECM/C3VL0241 120 215 40 390 430 49 3400 3600 6.7
NU 324 ECM/C3VL0241 120 260 55 610 620 69.5 2800 3200 14.9
NU 1026 M/C3VL2071 130 200 33 165 224 25 3800 3800 3.9
NU 226 ECM/C3VL2071 130 230 40 415 455 51 3200 3400 7.7
NU 326 ECM/C3VL2071 130 280 58 720 750 81.5 2400 3000 18.5
NU 1028 M/C3VL2071 140 210 33 172 245 27 3600 3600 4.1
NU 228 ECM/C3VL2071 140 250 42 450 510 57 2800 3200 9
NU 328 ECM/C3VL2071 140 300 62 780 830 88 2400 2800 25.5
NU 1030 M/C3VL2071 150 225 35 194 275 30 3200 3200 5
NU 230 ECM/C3VL2071 150 270 45 510 600 64 2600 2800 12
NU 330 ECM/C3VL2071 150 320 65 900 965 100 2200 2600 31.5


Single row cylindrical roller bearings have NU, NJ, NUP, N, RNU type, as well as the complete single row cylindrical roller bearings, cylindrical roller bearing without outer ring etc. 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. 

And different types of cylindrical roller bearings also have their different design according to their feather, and also many kinds of cages, just like Brass cage, Pressed Steel cage, nylon cage etc.

So insulated cylindrical roller bearings also have above mentioned characteristic with normal cylindrical roller bearings.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 with up to three times longer service life than the previous CoatMaster (China Bearing manufacturer, Top Quality standard), which is superior to all other conventional cylindrical roller bearings. The performance improvements of CoatMaster (China cylindrical roller bearings) over the past 15 years have permitted downsizing, whilst still maintaining the required performance.

How to install insulated bearing correctly?

Insulated bearing

The correct installation of the bearing is related to the service life of the bearing, especially for insulated bearings, super-precision bearings, angular contact ball bearings, spindle bearings, high-speed bearings, etc. Improper installation may cause the bearing to be scrapped, so correct installation and scientific installation Is a very important process

1.Use special tools for bearing installation and disassembly

Advanced installation tools can avoid insulated bearing damage caused by improper tools and operations during installation. For example, when installing the bearing, the staff used the copper rod knock-in method, which is easy to cause uneven axial force of the bearing, causing deformation of the cage, damage to the rolling elements, and larger clearance, and the copper rod is in the process of knocking. The copper powder flies into the bearing cage, which is easy to cause bearing failure. Therefore, professional bearing removal tools must be used.

2. Do the bearing inspection work before installation

Before installing an insulated bearing, check the package for completeness. If it is damaged, carefully check whether the insulation layer of the bearing is damaged. If this type of bearing is damaged, its insulation capacity is greatly reduced, and it is easy to be corroded by current and lose its insulation. The effect of the bearing is intact, you can proceed to the next step

3. Check the matching size of the insulated bearing and the rotor shaft

When assembling the motor, it is necessary to carefully check the matching size of the bearing and the rotor shaft when the bearing is installed, and the matching size of the bearing outer ring and the end cover hole.

4. Control the amount of oil in the bearing and the bearing housing

Too much oil in the bearing and the box will cause the rolling elements of the bearing to slip, causing the rolling friction to change from rolling friction to sliding friction, which will damage the rolling elements of the bearing. Due to the excessive amount of oil in the bearing, the free space in the bearing box is small, and the operating temperature of the bearing will be reduced. Rising, the lubricating grease density is reduced, the rolling element lubricating oil film becomes thin, the lubrication condition is poor, it is easy to cause abnormal bearing noise, surface slippage, and shorten the life of the bearing

5. Pay attention to ensure that the insulation function

For bearings with an insulation design on the outer ring, care must be taken to ensure that the insulation is intact. If the bearing insulation is damaged during installation, the thin oil film of the bearing will be broken down by the shaft voltage. After the oil film breaks down, not only will the lubrication conditions of the rolling elements be poor, but also the electric sparks generated will form electrical corrosion on the rolling elements of the bearing, causing the rolling elements The surface is not polished, which accelerates the wear of the bearing.


insulated bearing manufacturer

Choosing the right bearing for applications such as electric motors, which can be affected by stray electrical currents, is of the utmost importance. Electrical continuity can cause damage to raceways and rolling elements. This risk is greater in applications using frequency converters. Insulated ball bearings offer a cost-effective method of protection against electrical current. Insulated bearings from HQW Precision are ceramic coated with a very thin layer of up to 200μm to ensure insulation up to 2,000V. A 100 μm layer ensures insulation up to 1,000 V. The shaft and housing tolerances need not be adjusted compared to non-coated bearings because the ceramic layer thickness is considered in the design. Bearing Specifications:

■ Ceramic coating on inner or outer ring

■ Layer thickness optimised by special coating process

■ Performance characteristics (load/ speed) are unchanged Advantages:

■ High electrical resistance

■ Cost efficiency due to increased bearing life and reduced maintenance costs

■ No special housing or shaft tolerances necessary


E-mail: brandbearings@gmail.com


Whatsapp: 0086-13280450757


How many bearings are there on a hydraulic excavator?

A tracked hydraulic excavator requires about fifty bearings for its basic operation (travel and rotation).

Irrespective of its size and its use (earthwork, mining, demolition), it is made up of a crawler track chassis topped with a superstructure including the engine, hydraulic components (pump, motors, cylinders), the driving cab and the attachment (arm, boom, dipper, bucket).

hydraulic excavator bearings include: Crawler Excavator walking bearing, excavator slewing bearing, excavator needle roller bearing, excavator gearbox bearing, excavator walking motor bearing, excavator walking drive bearing, excavator spherical plain bearing, excavator slewing support bearing and English non-standard bearing used on excavator.


The two track sets are each driven by a planetary reducer using 2 angular contact ball bearings or tapered bearings – for supporting the reducer – and 14 needle roller bearings – for planet gears.

32 bearings are thus necessary so that the machine can move.


The superstructure pivots 360° thanks to a slewing ring of about 1.50 m diameter fixed on the straight truck chassis and a hydraulic motor or a planetary reducer. This includes 12 needle roller bearings for the planet gears and 2 spherical roller bearings for the shaft support.

14 bearings contribute to the swing of the superstructure.

Note that the plain bearings equip the various joints located on the boom, the dipper and the bucket.

Crawler Excavators Also have many kinds of design according to the special situations

— Standard Crawler Excavators

— Intelligent Machine Control

— Hybrid Crawler Excavators

— Short Tail Swing Crawler Excavators

— Demolition Crawler Excavators

— Super long Front Crawler Excavators

Quiet, safe and reliable. The environmentally friendly crawler excavators are also simple to operate and probably the most efficient around. It’s no wonder they’re among the top selling hydraulic excavators in the world.

Here, you can find a number of offers for your crawler excavators bearings. For information about the full range of excavator bearings offers, and to find a specific solution for your needs, please contact us.