Top3 of China Bearing Manufacturer-HRB

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Harbin Bearing Group Co., Ltd. is one of the 156 key construction projects in the country’s “One-Five-Year Plan” period. It is one of the three major bearing production bases in China Bearing manufacturer. Harbin people have created domestic bearing production with strong scientific research and innovation capabilities and arduous spirit of struggle. The first of many companies; the first company producing precision bearings; the first company producing precision machine tool spindle bearings; the first company producing low-noise motor bearings; the first company producing linear bearings; the first company producing aerospace bearings ; The first company to produce machine tool turntable combined bearings; the first to produce steel balls; the first to produce railway speed-up passenger car bearings.

From 2007 to the present, after restructuring and reorganization, separation of main and auxiliary, the lean Harbin Group now has 3,388 main production equipment, an annual production capacity of 80 million sets, and sales revenue of 1.2 billion. A bearing product system of more than 7,000 specifications and varieties of ten types, with leading products for railway passenger cars speed-up bearings, precision machine tool spindle bearings, and mining metallurgical bearings, has been formed. The railway speed-increasing passenger car bearings developed and produced by Harbin Shaft are confirmed as fixed-point manufacturers by the Ministry of Railways. Railway bearing products are well received by manufacturers due to their excellent quality and good reputation, and they have become the backbone products of Harbin axles. The spindle bearings of YRT series precision CNC machine tools developed by Harbin Shaft have filled the domestic gap and realized localization. It has made breakthroughs in various bearing technology fields such as ultra-high and low temperature, anti-corrosion and rust, and high-speed wear resistance. More than 600 products in five categories have won national, provincial, and municipal scientific progress awards and high-quality product awards. And equipment manufacturing have made significant contributions.

The company has passed the quality management system certifications of ISO9001-2000, GJB9001A-2001, TS16949-2009, AS9100 and ISO14000 standards, and established and perfected a scientific and standardized quality assurance system. HRB China bearing manufacturer have won such honors as “Chinese Famous Brand”, “Most Competitive Brand in the Market” and “Export Inspection Exempt Enterprise”.

 

 

 

 

Mainly products of HRB Group

1. Spherical Roller Bearing

2. Self-aligning ball bearing

3. Deep Groove ball bearing

4. Double-row angular contact ball bearing

5. Linear Motion ball bearing

6. Wheel Bearing

7. Two-way thrust ball bearing

8. Railway special bearing

9. Thrust spherical roller bearing

10. Thrust ball bearing

11. Printing machine bearings

12. Cylindrical Roller Bearing

13. Tapered roller bearing

14. Combined Bearing

15. Turbocharger Bearings

 

At present, the first phase investment of 1 billion yuan, covering an area of ​​350,000 square meters, is under construction in Limin Development Zone. The product manufacturing process is designed as follows: new process equipment, strong production capacity, detailed management process, strict process control, The process covers a wide range of products, high-grade products, technical transformation and the implementation of new projects. The construction of a modern bearing industrial park will be completed in the next three to five years. Focus on research and development of high-tech products such as railway bearings, third-generation automotive wheel bearings, high-end precision bearings, extra-large wind power bearings; adjustment and improvement of silent appliances for household appliances, industrial motor bearings, automotive tapered roller bearings and other products; the company’s immediate goal is bearings The products have reached domestic first-class and international advanced level. The long-term goal is to achieve the world-class bearing products. The production capacity of railways, third-generation automobile wheels, precision and wind power bearings will be built, and strive to achieve sales revenue of 1.5 billion yuan by 2015. The construction of the new plant strictly reflects high standards, reasonable process layout, fine and lean manufacturing processes, laboratory research and development closer to the actual production, simple and reasonable flow of goods, office areas, production areas, and living areas fully reflect the concept of people-oriented, achieving “becoming an international first-class “High-end bearing supplier” corporate vision, creating a better future for Harbin.

China Bearing manufacturer-Wafangdian Bearing Group Co., Ltd-ZWZ

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Wafangdian Bearing Group Co., Ltd. (hereinafter referred to as ZWZ) was founded in 1938. the earliest China Bearing manufacturer, It is the birthplace of China’s bearing industry and ranks eighth in the world bearing industry.  ZWZ has moved north to establish the Harbin Bearing Factory, assisted in the construction of Luoyang Bearing Factory, and built the Northwest Bearing Factory, and has provided hundreds of bearing companies across the country with talents, technology and management support and assistance. ZWZ Made important contributions for China Bearing Industry.

ZWZ is a state-owned assets holding limited liability China Bearing manufacturer with total assets of 7.2 billion, net assets of 3.6 billion, 11,000 employees and operating income of 7 billion yuan. The leading products of ZWZ are major technical equipment supporting bearings, rail transportation bearings, automotive vehicle bearings, wind power new energy bearings, precision machine tools and precision ball screws, and precision large forgings. The company has 8 major product manufacturing bases at home and abroad, a total of 23 manufacturing plants, a national enterprise technology center, a national bearing product testing and testing center, and the only “National Large-scale Bearing Engineering Technology Research Center” in China’s bearing industry. All of the more than 18,000 bearing products of the axle have independent intellectual property rights, accounting for 26% of all the conventional bearing varieties in the world, and meeting the market demand at the rate of developing nearly 1,000 new products each year, and new products account for about 45% of sales revenue. Products are exported to more than 100 countries and regions in the world.

The company has passed ISO9000, ISO14001, QS9000, ISO18000 and other international management system certifications. ZWZ has won honorary titles such as Liaoning Industrial Award, China Industrial Award, National Technology Innovation Demonstration Enterprise, National Intellectual Property Advantage Enterprise, National Enterprise Management Demonstration Enterprise, Liaoning Provincial Integrity Demonstration Enterprise, Bank and Tax AAA Enterprise. For years in a row, the company has been rated as a “contract-honoring and trustworthy enterprise” and a “customer satisfaction enterprise.”

 

At present, ZWZ will be driven by deepening corporate reforms, taking breakthroughs in high-end products and international markets as the main attack direction, and maximizing corporate benefits as the core, fully implementing commanding heights and internationalization strategies, accelerating the transformation of corporate development methods and advancing product structure adjustments. To improve and innovate enterprise management, fully revitalize enterprise resources, further enhance the core competitiveness of the enterprise, and strive to build the ZWZ into a large-scale bearing group with international competitiveness.

 

ZWZ Precision Technology and Manufacturing Industrial Park (South District)

ZWZ and Manufacturing Industrial Park (Southern District), covers an area of 1.05 million square meters, with a total investment of 6 billion yuan, of which 3 billion yuan is invested in industrial fixed assets. Projects for precision functional components and functional parts for heavy trucks are being built here, with a total sales increase of 10 billion yuan after full production.

 

The automobile bearing production base built in the Southern District has a fixed asset investment of 330 million yuan and a total area of 43,000 square meters. It is currently the world’s largest fully automated heavy-duty truck supporting bearing factory. Equipped with 56 production lines, forming a fully automatic production, research and development, production and manufacturing of automotive bearings in strict accordance with the quality management system standards, online detection, online assembly, and integration of information and industrialization. The products fully meet the supporting needs of the modern automotive industry, and guide the development of automotive bearings into units. At present, the production of automotive bearings by pads has been steadily supplied to many world-renowned companies. The annual output value reaches 370 million yuan.

A 18,000-square-meter spherical roller bearing production factory and a 27,000-square-meter heavy-duty truck bearing factory were built in the Southern District, with a total investment of 320 million yuan. At present, the construction of the plant has been completed. In the first half of the year, it entered the trial operation phase and was put into production in October 2014. A special bearing factory is under construction.

The automation rate of all production lines of the ZWZ (South District) Industrial Park will reach 70%, the labor productivity will reach 1.5 million yuan per capita per year, the project investment recovery period will be 7 years, and the energy consumption per 10,000 yuan output value will be reduced by 40%. The R & D and manufacturing of bearings in the seven strategic emerging industries will be accelerated, and the localization rate of major equipment bearings will reach 75%, which will significantly reduce customer procurement costs. Will use the world’s most advanced research and development design technology, process manufacturing technology and testing and testing technology, with the goal of high-tech industry, high-end products, to build a “leading precision technology, green manufacturing coverage, information technology integration, environmental protection and energy saving standards” modern factory.

 

Brief Introduction to ZWZ Precision Technology and Manufacturing Industrial Park (North District)

ZWZ Precision Technology and Manufacturing Industrial Park is located in the northwest of Wafangdian City,  3 kilometers from the old factory of Wazhou Group, with a total investment of 1.8 billion yuan. 90,000 square meters, the greening coefficient is 31.5%.

The new zone project revolves around the manufacture of major national equipment and precision equipment, replacing imports, and aims at the world’s advanced level, focusing on the development of high-tech, high-speed, high-precision, high-reliability bearing series. At present, the wind power series bearing project, precision machine tool bearing project, major equipment precision bearing project, precision transmission bearing project have all been put into production. Its equipment is all internationally advanced. The annual production capacity of wind power bearings can reach 6,000 units. High-precision bearings for CNC machine tools are now supporting domestic machine tools, and they are currently in a leading position at home and abroad. A series of supporting bearings for high-speed wire rods and wide and thick plate rolling mills has been fully matched for 20 rolling mill production lines including Anshan Iron and Steel. The development of these major products has created the conditions for the development of the national equipment manufacturing industry and the localization of key parts and components, and has also laid the foundation for the development of the axle. In 2013, sales revenue was 1.02 billion yuan.

In 2012, the National Large-scale Bearing Engineering Technology Research Center was put into production in the North District. After a year of hard work, a total investment of 120 million yuan, covering an area of 11,000 square meters and a building area of 18,500 square meters, has built a comprehensive building of a first-class engineering technology research center in China. Seven major bearing test platforms for wind power (energy), rail transportation, and special precision have been completed; large-scale test equipment such as turntable bearing simulation test machines for medical devices, wind power bearing special test machines, and railway bearing performance test machines have been put into operation. ; Newly purchased 160 sets of various types of bearing inspection test research equipment are of international advanced level. The center will be built into a core base of three major functions of technological innovation, technological transformation and personnel training in the field of large-scale bearings in the country. Relying on the “National Large-scale Bearing Engineering Technology Research Center” of Waxing Group in 2009, the Ministry of Science and Technology was included in the first batch of national project technology research center construction project plans. This is the only national large-scale bearing engineering technology research center in the bearing industry. On July 4, 2013, the inspection and acceptance group of the Ministry of Science and Technology came to Waxing to conduct on-site inspection of the construction of the National Large-scale Bearing Engineering Technology Research Center established by ZWZ (China Bearing manufacturer). The acceptance team believes that the bearing is connected to the national large-scale bearing engineering technology research center and is at the forefront of the country and the province. It hopes that the bearing will rely on the platform of technological innovation to build a national scientific and technological innovation base.

Why insulated bearing used in motor?

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Before answer why insulated bearing used in motor, we need to know what is Electrically insulated bearing? electric insulated bearing adopt the Special spraying process. The outer surface of the bearing is sprayed with high-quality coating, which has strong binding force with the substrate and good insulation performance. It can avoid the electric erosion of the induction current to the bearing, prevent the damage of the current to the grease, the rolling element and the raceway, and electrically insulated bearing improve the service life of the bearing. The process has been improved continuously. In the insulating bearing, there is a layer of 100 μ m thick coating on the outer or inner ring surface, which can withstand the voltage of up to 1000 V DC A special spraying process can form a coating with uniform thickness and strong adhesion, which can be further treated to avoid the influence of moisture and humidity.

Characteristics of electrically insulated bearings

  1. Resistant to electrical corrosion

By integrating insulation performance into the bearing, electrically insulated bearings can improve reliability and increase machine uptime by actually eliminating the problem of electrical corrosion

  1. High resistance

Alumina coating has a minimum resistance of 200MΩ and can withstand voltages up to 3000 V DC

  1. Stable electrical performance

Plasma spraying is usually hygroscopic and therefore easily susceptible to condensation and infiltration. To prevent this effect, Electrically insulated bearings are treated with a unique sealant.

 

It is mainly a frequency-converter motor powered by a frequency converter, especially a frequency-variable motor with a higher voltage and a frequency converter with a higher switching frequency. This needs to be 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 such as 400 and above are used. It is not even necessary, but now the frequency conversion power supply, because the power quality contains a lot of high-frequency components, causing the motor shaft current to increase.

Therefore, this problem should be considered in the specifications above 400, and even smaller specifications also consider the installation of insulated bearings according to the use situation. For example, the main motors used in electric cars, electric rail cars, etc. are generally about 100KW, and they must be Electrically insulated Bearings (or use other insulation structures to ensure shaft current does not flow).

Electrically insulated bearing are widely used in many kinds of industry, Motors, generators and related equipment are in danger when current passes through the bearings. This not only damages the contact surfaces of the rolling elements and raceways in the bearing (electrical corrosion), but also quickly degrades the grease. Another additional risk comes from high-frequency currents in motors and generators, which can form a loop through the parasitic capacitance inherent in the device. Increased risk of damage if frequency converter is used.

CoatMaster as the China bearing manufacturer & exporter & supplier, it can supply complete electrically insulated bearing, Our large quantity insulated deep groove ball bearing Stock can meet your need with good quality and fast delivery, Also you can find FAG Current insulated Bearing, the other type and brand insulated deep groove ball bearing, insocoat tapered roller bearing, Current-Insulated Bearings. CoatMaster would like to serve all of the industry customers bearing soluations, please contact with CoatMaster Technical Team.

SKF Electrically insulated bearing for power generating motor machinery

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SKF electrically insulated bearings has a long and extensive experience in the motor industry and most industries using motor bearings. In this highly competitive industry, SKF’s extensive knowledge has been used to develop various types of motor bearing solutions to meet the growing needs of motor bearing users in improving quality, shortening delivery times, reducing noise levels, and improving technical support. . At the same time SKF can also provide some special motor bearings to meet specific applications. Just like SKF electrically insulated bearings.

SKF electrically insulated bearing are widely used in many kinds of industry, Motors, generators and related equipment are in danger when current passes through the bearings. This not only damages the contact surfaces of the rolling elements and raceways in the bearing (electrical corrosion), but also quickly degrades the grease. Another additional risk comes from high-frequency currents in motors and generators, which can form a loop through the parasitic capacitance inherent in the device. Increased risk of damage if frequency converter is used.

SKF Electrically insulated bearings:

— Designed to prevent current from flowing through the bearing

— The outer surface of their inner or outer ring is coated with an insulated alumina layer, and a sophisticated plasma spray process is applied to obtain an excellent quality finish.

— A very cost-effective solution compared to other insulation methods

Characteristics of SKF insulated bearings

  1. Resistant to electrical corrosion

By integrating insulation performance into the bearing, SKF electrically insulated bearings can improve reliability and increase machine uptime by actually eliminating the problem of electrical corrosion

  1. High resistance

Alumina coating has a minimum resistance of 200MΩ and can withstand voltages up to 3000 V DC

3.Stable electrical performance

Plasma spraying is usually hygroscopic and therefore easily susceptible to condensation and infiltration. To prevent this effect, Electrically insulated bearings are treated with a unique sealant.

 

Series of electrically insulated bearing

The standard scope of supply of insulated bearings includes the most common sizes and variants of bearings:

  • Single-row deep groove ball bearings

  • Single-row cylindrical roller bearings

In addition to the standard classification, SKF can also provide special INSOCOAT bearings and bearing units with complex ring geometries such as:

— Flanged tapered roller bearings

— Traction motor bearing unit

CoatMaster as the China Bearing Manufacturer, it focus on Research & develop the Electrically Insulated Bearing since 2009, Through 10 years learning from SKF, FAG, NSK Such top quality Bearing manufacturer, CoatMaster Mastered the core technology of insulation technology and the quality of Electrically insulated bearing reached the world class quality level and save the cost for the insulated bearings end-user. its quality are proved by our regular customers on the market.

It not only can produce the top quality Insulated deep groove ball bearings, insulated cylindrical roller bearing, insulated tapered roller bearings, but also the inuslated spherical roller bearing, insulated spherical roller thrust bearings, insulated angular contact ball bearings, insulated linear motion bearing, insulated self-aliging ball bearings, Hybrid ceramic bearing etc. CoatMaster would like to supply the complete bearing industry solution for Electrical Motor of Railways,Industrial electric motors & generators,Wind energy,Construction,Industrial pumps.

How do you install the spherical roller bearing ?

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The structure of spherical roller bearing makes it have the function of self-aligning. So it usually called self-aligning roller bearings on the market. It can not only bear the radial load, but also bear the axial load of two-way action, with strong impact resistance. Spherical roller bearing mainly used in paper making machinery, gear box bearing seat of rolling mill, roller of rolling mill, crusher, vibrating screen, printing machinery, woodworking machinery, reducer for various industries, etc. Most of the end-users of spherical roller bearings don’t know how do you install the spherical roller bearing. They are afraid that the installation will not affect the use. What should be paid attention to in the installation? CoatMaster bearing industry engineer will explain to you about the installation of the spherical roller bearings. As for the installation of spherical roller bearing,  maybe you think that the  professional engineer to install. You don’t need to know too much about it. In fact, only when you understand the installation process can you use it better. Now I’m going to show you how to install the spherical roller bearing.

Mounting and dismounting of spherical roller bearings

Before install the spherical roller bearings, we need to know something about the bearings, To provide proper bearing performance and prevent premature failure, skill and cleanliness when mounting spherical roller bearings are necessary. Bearing care prior to mounting,Proper care begins in the stock room. Store bearings in their original unopened packages, in a dry place. The bearing number is plainly shown on the box or wrapping. Before packaging, the manufacturer protected the bearing with a rust preventive slush compound. An unopened package means continued protection. The bearings need to be left in their original packages until immediately before mounting so they will not be exposed to any contaminants, especially dirt. Handle the bearing with clean, dry hands and with clean rags. Lay the bearing on clean paper and keep it covered. Never expose the bearing on a dirty bench or floor. Never use a bearing as a gauge to check either the housing bore or the shaft fit.

Don’t wash a new bearing. it is already clean. Normally, the preservative with which new bearings are coated before leaving the factory does not need to be removed; it is only necessary to wipe off the outside cylindrical surface and bore. If, however, the bearing is to be grease lubricated and used at very high or very low temperatures, or if the grease is not compatible with the preservative, it is necessary to wash and carefully dry the bearing. This is to avoid any detrimental effect on the lubricating properties of the grease. Old grease can be washed from a used bearing with a solvent but the fluid and container must be clean. After this cleaning, wash the bearing out thoroughly with light oil and then relubricate.

How to install the spherical roller bearing? First of all, we have to know more about the internal structure of spherical roller bearings,

Spherical roller bearings consist of inner ring with two raceway and outer ring with a spherical raceway, as well as the pressed cage or brass cage, spherical rollers. The curvature center of the raceway surface of the outer ring is caused by the bearing center, so it has the same centering function as the self-aligning ball bearing. When the shaft and shell are flexed, the load can be adjusted automatically and the axial load in two directions can be adjusted. Large radial load capacity, suitable for heavy load, impact load. The inner diameter of the inner ring is a bearing with a tapered hole, which can be installed directly. Or install it on the cylindrical shaft with a tightening sleeve and a dismounting cylinder. The cage is made of steel plate stamping cage, polyamide forming cage and copper alloy car cage. Spherical roller bearing can carry larger and heavier capacity than self-aligning ball bearings, not not so much higher speed than self-aligning ball bearings.

For spherical roller bearings, when the bearing with shaft is installed into the shaft hole of the box, the use of the middle mounting ring can prevent the outer ring from tilting and rotating. It should be remembered that some sizes of self-aligning ball bearings have the ball protruding from the side of the bearing, so the middle mounting ring should be recessed to prevent damage to the ball. A large number of bearings are generally installed by mechanical or hydraulic pressing method.

The bearings should be left in their original packages until immediately before mounting so they do not become dirty. The dimensional and form accuracy of all components, which will be in contact with the bearing, should be checked.

Step 1 Remove any burrs or rust on the shaft with an emery cloth or a fine file

Step 2 Wipe the shaft with a clean cloth.

Step 3 Measure the shaft diameter

Step 4 Remove the locknut and locking washer from the adapter sleeve assembly.

Step 5 Wipe preservative from the adapter O. D. and bore. Remove oil from the shaft to prevent transfer of oil to the bore of the adapter sleeve.

Step 6 Position the adapter sleeve on the shaft, threads outboard as indicated, to the approximate location with respect to required bearing centerline. For easier positioning of the sleeve, a screwdriver can be placed in the slit to open the sleeve.

Step 7 Applying a light oil to the sleeve outside diameter surface results in easier bearing mounting and removal. Wipe the preservative from the bore of the bearing. It may not be necessary to remove the preservative from the internal components of the bearing unless the bearing will be lubricated by a circulating oil or oil mist system.

Step 8 Place the bearing on the adapter sleeve, leading with the large bore of the inner ring to match the taper of the adapter. Apply the hydraulic nut (DO NOT apply the locking washer at this time). Ensure that the bearing bore size is equal to the hydraulic nut. Otherwise, the pressure in the table must be adjusted. Drive the bearing up to the starting position by applying the hydraulic pressure listed in Starting Position for the specific bearing size being mounted. Monitor the pressure by the gauge on the selected pump. As an alternative, SKF mounting gauge TMJG 100D can be screwed directly into the hydraulic nut.

Step 9 Drive the bearing up the adapter sleeve the required distance Ss shown under column heading. The axial drive-up is best monitored by a dial indicator.

Step 10 Remove the hydraulic nut and install the locking washer on the adapter sleeve. The inner prong of the locking washer should face the bearing and be located in the slot of the adapter sleeve. Reapply the locknut until tight. (DO NOT drive the bearing further up the taper, as this will reduce the radial internal clearance further).

Step 11 Find the locking washer tang that is nearest a locknut slot. If the slot is slightly past the tang don’t loosen the nut, but instead tighten it to meet the closest locking washer tang. Do not bend the locking tab to the bottom of the locknut slot.

Step 12 Check that the shaft and outer ring can be rotated easily by hand. Note: For bearings with a bore diameter greater than 200mm, hydraulic assist is recommended in addition to using the hydraulic nut.

After installation, the spherical roller bearing shall be tested to see if there is any abnormality. If there is any noise, vibration and other problems, it shall be stopped and checked in time. For more questions about installation of spherical roller bearing. Please contact with our engineer for details.

CoatMaster as the China bearing manufacturer & exporter & supplier, it can supply complete electrically insulated bearing, Our large quantity spherical roller bearing Stock can meet your need with good quality and fast delivery, Also you can find sealed spherical roller Bearing, spherical roller thrust Bearing, tapered roller Bearing, cylindrical roller bearing are also have manufacture production for electrically insulated Bearing, the other type and brand insulated deep groove ball bearing, insocoat tapered roller bearing,  Small order is available also by us, DHL,UPS,Fedex is the best choice for shipment for small quantity, the weight more than 80kg and less than 500 kg, we suggest ship them by air to port, we alway supply for the best solution for your applications, just contact with CoatMaster for start our service.

What are Electrically Insulated Bearing?

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Electrically Insulated bearing refers to the general term of the bearing with insulating property, which can block the current passing through the bearing itself. Its insulating property is usually guaranteed by coating a layer of insulating material on the outer or inner ring of the bearing with a special process, or its rolling element is made of ceramics. Let us talk more about the electrically insulated bearing as follows:

Electrically Insulated bearing is a brand new bearing product integrating mechanical, electrical, material and other multidisciplinary technologies. Compared with the traditional bearing, it increases the function of insulating the bearing itself, which is specially designed to prevent electrolytic corrosion. It has long service life and high reliability than normal rolling bearings. It has begun to be used in railway locomotive traction main motor, hydraulic power generation, thermal power generation, wind power equipment motor, coal mine machinery motor and other occasions that are vulnerable to electric shock or stray current.

After spraying, the coating shows a certain amount of open and interconnected pores, a common property of thermal spray coatings. The amount and appearance of porosity depend strongly on the coating process parameters. It is easy to understand that porosity closing, “sealing”, is crucial in thermal spray processing. This reduces the risk of corrosion, improves the mechanical properties and keeps the insulating properties constant, which is very important in humid climates.

 

  1. Ceramic coating

1) coating thickness: 0.2mm ~ 0.4mm

2) insulation resistance: greater than or equal to 10m Ω

3) breakdown voltage: more than 1000V

 

2. Special PPS coating

1) coating thickness: 0.2mm ~ 0.4mm

2) insulation resistance: greater than or equal to 100m Ω

3) breakdown voltage: more than 1000V

The electric insulated bearing is the general term of the bearing which can prevent the current from passing through and has the insulating property，Its insulation performance is usually to process a layer of alumina coating on the outer ring or inner ring of the bearing by using the international advanced technology to withstand the voltage DC，It is generally divided into inner ring coated insulated bearing and outer ring coated electrically insulated bearing. Its basic coating can withstand voltage up to 1000 V DC. Its code adopts international bearing code.

CoatMaster As the Top Brand of China Bearing manufacturer, focus on reserch & develop Electrically Insulated Bearing, it can provide various types of insulated bearings

  1. Electrically insulated deep groove ball bearing
  2. Electrically insulated angular contact ball bearing
  3. Electrically insulated cylindrical roller bearing
  4. Electrically insulated tapered roller bearing
  5. Electrically insulated spherical roller bearing
  6. Electrically insulated spherical roller thrust bearing
  7. Electrically insulated linear motion bearing
  8. Inner or outer ring insulated bearing with oxide coating
  9. Hybrid bearing with electric insulating ceramic rolling element

CoatMaster as the China bearing manufacturer & exporter & supplier, it can supply complete electrically insulated bearing, Our large quantity insulated deep groove ball bearing Stock can meet your need with good quality and fast delivery, Also you can find FAG Current insulated Bearing, NSK Insulated Bearing, SKF INSOCOAT Bearing, NTN, NKE are also have manufacture production for electrically insulated Bearing, the other type and brand insulated deep groove ball bearing, insocoat tapered roller bearing,  Small order is available also by us, DHL,UPS,Fedex is the best choice for shipment for small quantity, the weight more than 80kg and less than 500 kg, we suggest ship them by air to port, we alway supply for the best solution for your applications, just contact with CoatMaster for start our service.

What is Electrically Insulated Bearing?

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The electrically insulated bearing is the general term of the bearing which can prevent the current from passing through and has the insulating property，Its insulation performance is usually to process a layer of alumina coating on the outer ring or inner ring of the bearing by using the international advanced technology to withstand the voltage DC，It is generally divided into inner ring coated insulated bearing and outer ring coated electrically insulated bearing. Its basic coating can withstand voltage up to 1000 V DC. Its code adopts international bearing code. this kind of bearing designed by SKF.

Special spraying process is adopted for the electric insulated bearing. The outer surface of the bearing is sprayed with high-quality coating, which has strong binding force with the substrate and good insulation performance. It can avoid the electric erosion of the induction current to the bearing, prevent the damage of the current to the grease, the rolling element and the raceway, and electrically insulated bearing improve the service life of the bearing. The process has been improved continuously. In the insulating bearing, there is a layer of 100 μ m thick coating on the outer or inner ring surface, which can withstand the voltage of up to 1000 V DC A special spraying process can form a coating with uniform thickness and strong adhesion, which can be further treated to avoid the influence of moisture and humidity. Electrically insulated bearings are widely used in electric motors and generators, especially in frequency conversion motors, which are widely used in electric power industry, railway industry, mechanical metallurgy industry, mining machinery industry, petrochemical industry, high-voltage motors and other industries.

 

CoatMaster can provide various types of insulated bearings

  1. Electrically insulated deep groove ball bearing
  2. Electrically insulated angular contact ball bearing
  3. Electrically insulated cylindrical roller bearing
  4. Electrically insulated tapered roller bearing
  5. Electrically insulated spherical roller bearing
  6. Electrically insulated spherical roller thrust bearing
  7. Electrically insulated linear motion bearing
  8. Inner or outer ring insulated bearing with oxide coating
  9. Hybrid bearing with electric insulating ceramic rolling element

The electric insulated bearing can avoid the damage caused by the electric corrosion, so compared with the ordinary bearing, it can guarantee the operation more reliable. Compared with other insulation methods, such as shaft or shell insulation, it is more cost-effective and reliable. The external dimensions and basic technical characteristics of insulated bearings are the same as those of uninsulated bearings, so they can be 100% interchanged. It is suitable for motors and generators, especially for variable frequency motors.

CoatMaster as the China bearing manufacturer & exporter & supplier, it can supply complete electrically insulated bearing, Our large quantity insulated deep groove ball bearing Stock can meet your need with good quality and fast delivery, Also you can find FAG Current insulated Bearing, the other type and brand insulated deep groove ball bearing, insocoat tapered roller bearing, Current-Insulated Bearings.

XRB Optimized Spherical Roller Bearing Manufacturer

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CoatMaster spherical roller bearing, The High quality design of XRB for top quality demand market, CoatMaster will be start its industrial service for the high end market in the world. it quality can meet 70% of FAG. we will introduce CoatMaster quality in coming news of XRB.

Spherical roller bearing also named self aligning roller bearing, it is a kind of radial bearing, It can bear radial load and two direction radial and axial load, The spherical roller bearing has larger radial bearing capacity and the function of self-aligning, Lower requirements for machining accuracy of casing. So this factor can Avoid installation error or shaft deflection affecting the use of bearings and Moreover, it has high resistance to vibration and impact.

The structure type of double row develops rapidly, From the initial use of asymmetrical spherical roller to the later use of symmetrical spherical roller, The symmetrical spherical roller bearing changes the situation that the force on the middle flange of the inner ring is large, Make the roller stress concentrate on the maximum diameter of the roller, The thickness of the middle retaining ring is reduced, the length of the roller is increased correspondingly, and the bearing capacity is improved, we call this enhanced type spherical roller bearing, the suffix will be C or CA.

Like the self-aligning ball bearing, the Spherical roller bearing also has the self-aligning property, However, due to the large contact surface between the roller and the raceway, its friction capacity is much higher than that of the self-aligning ball bearing. Because the self-aligning roller bearing also has great friction resistance in rotation, the limit speed of this kind of bearing is lower than that of the ball bearing, However, it is different from the line contact between the roller and the raceway in the tapered roller bearing, and the limit speed is higher than that of the tapered roller bearing.

Common structure types of self aligning roller bearing1.Basic type of spherical roller bearing 20000C, Asymmetric spherical roller bearing Type 20000
2.Tapered bore spherical roller bearings 20000CK (1:12) and 20000 CK30 (1:30). This kind of bearing is installed on the tapered shaft by the taper of inner diameter, Using the axial displacement of the bearing to meet the requirements of the interference with the shaft. It avoids the complex operation of heating installation due to large interference and the problems of easy installation and hard dismount. Of course, the increase of interference will correspondingly reduce the radial clearance of the bearing.

The structure of the tapered bore spherical roller bearing acting together with the adapter sleeve is 20000C + H000 type. The model of H000 Adapter sleeve has been generalized and standardized, and can be used with bearings with various tapered bore. This kind of structure bearing can be installed on the optical shaft without shaft shoulder, which meets the requirement of adjusting the fit interference, and avoids the difficult problem that the taper angle of the tapered shaft is difficult to control, which makes the bearing installation and dismount more convenient.

XRB is the China bearing manufacturer & exporter & supplier, it can supply spherical roller bearing, our large quantity Electrically insulated Cylindrical Roller Bearing Stock can meet your need with good quality and fast delivery, Also you can find sealed spherical roller Bearing, the stainless steel spherical roller bearing, single row spherical roller bearing. spherical roller thrust roller bearing. Electrically Insulated bearing, the other type and brand Electrically insulated Cylindrical Roller bearing, insocoat tapered roller bearing, Current-Insulated Bearings.

Application of Insulated Bearings in Electric motors

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1. Causes and harm of motor shaft voltage and bearing current formation

In the operation of the motor, any imbalance in the phase currents in or around the rotor’s magnetic circuit can  produce a rotating system flux linkage.

When the shaft rotates, these flux chains can generate a potential difference across the shaft. This potential difference is called the shaft voltage. The shaft voltage can excite a circulating current through a loop formed by the two ends of the bearing in the shaft and the casing (closed circuit), which is called the shaft current.

In addition, the rotor core has more remanence, For a wound rotor motor, shaft voltage and shaft current are generated if two or more windings are short-circuited to the rotor core or the shaft. the bearing current is related to the structure of the motor, the power of the motor, the magnitude of the drive voltage, the rise time of the pulse, the length of the cable, etc. The larger the power of the motor, the higher the driving voltage, the steeper the rising edge of the driving voltage, and the shorter the cable, the larger the bearing current.

2. How to block shaft current – use electrically insulated bearings

In order to avoid damage to the bearing caused by the shaft current, effective measures should be taken to isolate the shaft current. For large motors with independent bearing housings at both ends, spacers made of insulating material can be placed between the bearing housing and the metal base. For a motor in which an ordinary bearing and a casing are integrated, an Electrically insulated bearing is generally used at one end thereof (often arranged at the non-spindle end).

For high requirements, insulated bearings are installed at both ends. The insulating bearing used is generally a method of attaching (generally coating) an insulating layer to the outer ring. In some cases, the inner and outer rings are also provided with an insulating layer.

Electrically insulated bearings avoid damage caused by electrical corrosion, so they are more reliable in operation than in conventional bearings. And compared to other insulation methods, such as shaft or housing insulation, etc. More cost effective and reliable. Insulated bearings have the same dimensions and basic technical features as non-insulated bearings Suitable for motors, generators, especially variable frequency motors.

CoatMaster (China Bearing manufacturer), As the exprienced Electrically Insulated Bearing manufacturer of China, Not only produce insulated deep groove ball bearing, insulated cylindrical roller bearing, insulated tapered roller bearing, insulated angular contact ball bearing and the other type of insulated bearing, but also supply complete and expert solution for electric motor and the other applications where need insulated bearing. if you have problem make you distracted about the insulated bearing, just contact with our bearing technical team.

insulated-cylindrical-roller-bearing

What is Electrically Insulated Bearings?

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Electrically Insulated Bearing adopted special spraying process, the outer surface of the bearing is coated with high quality film,which has strong binding force with the substrate and good insulation performance.It can avoid the electric erosion of the bearing caused by the induced current, prevent the damage caused by the current to the grease, rolling body and raceway, and improve the service life of the bearing.

The process has been improved continuously. In the insulated bearing, there is a layer of 100μ m thick coating on the outer or inner ring surface, which can withstand the voltage of up to 1000 V DC. Special spraying process can form a coating with uniform thickness and strong adhesion,After further treatment, To protect it from moisture and humidity after further treatment.

Electrically Insulated Bearing can avoid the damage caused by electric corrosion, Therefore, compared with the common bearing, it can be used in the motor to ensure more reliable operation. Compared with other insulation methods, such as shaft or shell insulation, it is more cost-effective and reliable. The external dimensions and basic technical characteristics of insulated bearings are the same as those of uninsulated bearings, so they can be 100% interchanged. It is suitable for motors and generators, especially for variable frequency motors.

 

Electrically insulated bearing classification

Electric insulated deep groove ball bearing

Electric insulated angular contact ball bearing

Electrical insulated cylindrical roller bearing

Insulated bearing of inner or outer ring with oxide coating

Hybrid bearing with electrically insulated ceramic rolling element

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