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.
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
RN type cylindrical roller bearing with cage guide, especially suitable for high speed
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.
https://www.china-bearing-manufacturer.com/wp-content/uploads/2021/07/F-49285-bearing.jpg500500chinabearingadminhttps://www.china-bearing-manufacturer.com/wp-content/uploads/2019/11/CoatMaster-1.pngchinabearingadmin2021-07-17 12:23:402021-07-17 12:27:25INA Standard F-49285 Bearing for Planetary Gear Box
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.
https://www.china-bearing-manufacturer.com/wp-content/uploads/2021/07/toroidal-roller-bearings-factory.png500500chinabearingadminhttps://www.china-bearing-manufacturer.com/wp-content/uploads/2019/11/CoatMaster-1.pngchinabearingadmin2021-07-16 22:26:542021-07-16 22:31:24Japan Bearing Industry History
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.
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.
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.
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.
–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.
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.
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
Skype:brandbearings
Whatsapp: 0086-13280450757
www.china-bearing-manufacturer.com
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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.
Travel
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.
Swing
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.
https://www.china-bearing-manufacturer.com/wp-content/uploads/2021/03/excavator-bearings.jpg392500chinabearingadminhttps://www.china-bearing-manufacturer.com/wp-content/uploads/2019/11/CoatMaster-1.pngchinabearingadmin2021-03-04 14:58:072021-03-04 14:58:07How many bearings are there on a hydraulic excavator?
SKF INSOCOAT bearings with electrically insulating coating are the special design special used in Electric motor. This design have the same dimension with the normally bearings, same weight and same cage, but INSOCOAT bearing have the electrially insulating coating on the outer ring or inner ring. At the present, Some bearing manufacturer can supply this kind of electrially insulating bearings, SKF, FAG, NSK, NTN, NKE, CoatMaster, ZKL, GRW Bearing.
Electric motors, generators and associated equipment are at risk when an electric current passes through their bearings. This can damage the contact surfaces of rolling elements and raceways in the bearings (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents caused by the inherent stray capacitance. The risk of damage increases where the application uses a frequency converter.
INSOCOAT bearings are designed to prevent electric current from passing through the bearing. The external surfaces of either their inner or outer ring are coated with an insulating aluminium oxide layer, by applying a sophisticated plasma-spray process for an outstanding quality finish. The solutions are very cost-effective compared with other insulation methods.
They must be robust enough to operate in electrical equipment with modern AC technology. The passage of electric current through rolling bearings can lead to damage in a relatively short period of time. Small craters caused by electric current passage which have been tolerated occasionally in the past are no longer acceptable. SKF, as a consequence, has developed the INSOCOAT bearing range. These bearings have special coated outer rings with an electrically-insulated layer for a breakdown voltage up to 1,000 V.
To ensure smooth, trouble-free operation, it is necessary to prevent the bearing from electric current passage. The contact areas between housing, outer ring, rolling elements, inner ring and shaft can act as electric contacts. The resulting arcs – characterised by very high temperatures similar to that produced by melting and welding processes – will damage rolling elements as well as raceways of bearing rings. Typical damage is characterised by craters and false brinelling.
The insulating coating on the outer ring of the INSOCOAT bearing is made from aluminium oxide and applied using plasma spraying technology. SKF has carried out extensive research and development in this area and is pursuing further improvement of the process. The latest phase of the development is the ability to handle a 1,000V dielectric breakdown voltage.
Design characteristics of the bearing include:
ISO standard dimensions and tolerances
Interchangeability with non-insulated bearing types
Suitability for all common housing types
Dielectric breakdown voltage optional up to 500V or 1,000V.
Common suffixes used for INSOCOAT bearings are:
VL024 and VA309 breakdown voltage to 500V and VL0241 and VA3091 breakdown voltage up to 1,000V. VA309 and VA3091 are applied to bearings for traction motor applications.
In principle, electrically-insulated bearings can be of any type. Most common bearing types include cylindrical roller bearings and deep groove ball bearings with outside diameters larger than 75 mm for traction motor designs, stationary electric motors (medium and large types), generators and special applications including submersible pumps. Also electrically-insulated taper roller bearings could be used as wheel bearings for tram and suspension tube bearings for electric railway vehicles.
https://www.china-bearing-manufacturer.com/wp-content/uploads/2021/01/SKF-INSOCOAT-bearings-with-electrically-insulating-coating1.jpg525700chinabearingadminhttps://www.china-bearing-manufacturer.com/wp-content/uploads/2019/11/CoatMaster-1.pngchinabearingadmin2021-01-16 20:39:532021-01-16 20:39:53SKF INSOCOAT bearings with electrically insulating coating
Off-road construction machinery may work at low speed, but to raise productivity and reduce downtime, reliable operation under intense pressure is key.
Operators need to comply with strict environmental standards, control costs and improve machine performance. All types of machinery, from wheel loaders to road rollers, must continue to work effectively under harsh operating conditions.
Our expertise can help you achieve this. Components such as bearings, seals and lubricants play a key role in improving rotating equipment performance. Meanwhile, our smart lubrication systems help automate the maintenance process, and reduce costs, while condition monitoring spots early signs of component damage to prevent downtime.
Special bearing used in Construction Machinery as follows:
Planetary Gear Bearings Excavator machinery bearing
hydraulic bearing
Bearing of hydraulic pump
Special needle roller bearing for hydraulic pump
Full complete cylindrical roller bearing without outer ring
Standard bearings – commonly used bearing types in construction and heavy machinery:
Spherical roller bearings
Cylindrical roller bearings
Tapered roller bearings
Spherical Plain Bearing
Construction machinery is the important part of assembly industry. Generally speaking, construction engineering, road construction and maintenance, flow type lifting handling operation and various construction projects need necessary for comprehensive mechanized construction engineering machinery and equipment, known as engineering machinery. It is mainly used in construction, transportation, national defense construction, energy industry, mine construction and production raw materials, such as construction and industrial production, agriculture, forestry and water conservancy construction, industrial and civil construction, urban construction, environmental protection and other fields.
Despite facing harsh operating conditions, crawler excavators must operate profitably in construction projects. They are required to move more materials with greater speed and reliability, suffer less downtime and use fuel more efficiently. Choosing components and services that raise efficiency, maintain uptime and reduce environmental impact is crucial.
An example of how this is achieved is the use of automatic lubrication systems. These perform a critical operation with essentially no human intervention. As well as streamlining and improving the process of lubrication, it leaves staff free to concentrate on other tasks. In some instances, it’s possible to avoid re-lubrication completely, with sealed bearings that are lubricated for life, like for example, our Explorer plain bearings.
CoatMaster Bearing supply Complete Bearings for Construction Machinery Industry, Its pleasure to know any demand from you who need this kinds of bearings, we would like to supply One-Stop Shopping for you, this list we only showed the excavator bearing list, the more details demand, please contact with us.
https://www.china-bearing-manufacturer.com/wp-content/uploads/2021/01/Bearing-for-constructionmachinery-equipment.jpg466700chinabearingadminhttps://www.china-bearing-manufacturer.com/wp-content/uploads/2019/11/CoatMaster-1.pngchinabearingadmin2021-01-11 11:41:372021-01-11 11:42:00China Bearing for construction machinery
Insulated cylindrical roller bearing mean the same design with normal standard cylindrical roller bearing with coated insulated materials on the inner ring or outer ring. The cylindrical roller and raceway of the cylindrical roller bearing are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the retaining edge of the ring is small, which is suitable for high-speed rotation. The inner and outer rings of cylindrical roller bearings can be separated. According to whether the rings have ribs or not, they can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN series.
Cylindrical roller insulated bearings are designed to prevent current from passing through the bearing. On the outer surface of the inner ring of the bearing or the outer surface of the outer ring, a layer of aluminum oxide coating with insulating properties is sprayed through a complex plasma spraying process, which can avoid the electric corrosion effect of the induced current on the bearing and prevent the current from affecting the grease and grease. Damage caused by rolling elements and raceways can increase the service life of the bearing. The external dimensions and basic technical characteristics of cylindrical roller insulated bearings are the same as ordinary cylindrical roller bearings, so they can be interchanged each other.
Compared with ordinary insulated bearings, cylindrical roller insulated bearings have good electrical corrosion resistance. By integrating insulation properties into the bearings, insulated bearings can improve reliability by eliminating electrical corrosion problems and extend the uptime of equipment. Cylindrical roller insulated bearings adopt a unique sealing process to encapsulate the bearings, which can be protected from humidity and moisture during use. The aluminum oxide coating on the surface has a minimum resistance of 200MΩ and can withstand a voltage of up to 3000V DC.
Features and benefits of Insulated cylindrical roller bearing
— Protection against electrical erosion
With insulating properties integrated into the bearing, INSOCOAT bearings can improve reliability and increase machine uptime by virtually eliminating the problem of electrical erosion.
— High electrical resistance
The aluminium oxide coating provides a minimum electrical resistance of 200 MΩ and can withstand voltages up to 3 000 V DC.
— Consistent electrical performance
Plasma-spray coatings are normally hygroscopic and, therefore, vulnerable to penetration caused by condensation. To protect against this effect, INSOCOAT bearings are treated with a unique sealant.
Cylindrical roller insulated bearings are widely used because of their characteristics:
— Power industry: Cylindrical roller insulated bearings for generators; wind generators, hydroelectric generators, and thermal generators.
— Railway industry: cylindrical roller insulated bearings for traction motors of diesel locomotives, used in locomotives, etc.
— Machinery and metallurgy industry: Insulated bearings for high-power inverter motors: used in cranes, textile machines, printing machines, iron-making equipment, steel-making equipment, rolling equipment, cutting equipment, coking equipment, smelting equipment, etc.
— Mining machinery industry: insulated bearings for high-power and high-voltage motors, used in mining machines, coal separators, coal washers, crushers, ball mills, grinders, sand mills
— Petrochemical industry: insulated bearings for high-power and high-voltage motors: used in compressors, etc.
Company Information
Factory add: Yandian Industrial zone, Liaocheng city, Shandong province of China
