Tag Archives: double row bearings

China best Double Row Ball Slewing Bearings near me shop

Double Row Ball Slewing Bearings

The double row ball slewing bearing has 3 seat rings. The steel balls and isolators can be directly arranged into the upper and lower raceways. Under stress conditions, the upper and lower rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The bearing angle of the upper and lower arc raceway is 75 degrees. It can bear a great deal of axial force and overturning moment. The raceway must be specially designed when the radial force is more significant than 0.1 times the axial force. The axial and radial dimensions of the double row ball slewing bearing are relatively large, and the structure is fastened. It is especially suitable for handling tower cranes, truck cranes, and other loading machines that require medium or above diameters and military products.

Characteristic of structure, performance

Double row ball slewing bearing has 3 seat ring, the steel ball and the spacing block can be directly arranged into the upper and lower races, and 2 rows of upper and lower steel balls with different diameters are fitted according to the stress condition.
This kind of open assembly is very convenient, for the upper and lower bear raceway arc angles is 90°, which can bear large axial forces and tilting moment. When the radial force is more significant than 0.1, the axial force must be specially designed for the raceway.
Double row ball slewing bearing’s axial and radial size are relatively large and solid in structure. It is especially suitable for the medium diameter tower cranes, truck-mounted cranes, etc., loading and unloading machinery.

The basic structures of double row ball slewing bearing are as below:

(1) External gear

(2) Internal gear

Product parameters

(1) Model and size parameters of external gear double-row ball slewing bearing

Model Dimensions Installation Size Tooth Parameters Load Weight
De de di Di He Hi Ht Fe Fi N V L W m Z x·m Dp
[mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [-] [mm] [-] [mm] [-] [mm] [mm] [kN] [kg]
2B22-E-0307 432 309 305 224 83 83 92 360 254 16 17 25 12 6 70 420 40.8 51
2B22-E-0383 504 385 381 300 83 83 92 436 330 16 17 25 12 8 61 488 81.6 64
2B25-E-0475 595 477 473 382 88 88 98 540 410 24 17 25 14 5 117 585 34 85
2B25-E-0575 712 577 573 470 88 88 98 640 508 24 17 25 9 8 87 696 81.6 123
2B20-E-0752 864 754 750 678 83 83 92 800 706 36 17 25 9 6 142 852 62 114
2B25-E-0821 979 823 819 718 92 92 102 893 753 36 21 31 15 10 94 11 940 141.2 200
2B20-E-0968 1080 970 966 893 83 83 92 1015 922 30 17 25 10 8 133 1064 82.6 148
2B25-E-1077 1200 1079 1075 976 88 88 98 1135 1012 36 19 8 148 1184 83.6 210
2B25-E-0980 1144 982 978 870 96 96 110 1050 910 36 21 31 12 10 111 8 1110 170 262
2B28-E-1117 1289 1120 1114 985 98 98 108 1198 1035 40 21 31 18 10 125 10.5 1250 160.4 332
2B28-E-1215 1380 1218 1212 1095 98 98 108 1290 1135 36 23 34 16 10 136 1360 144 334
2B30-E-1249 1476 1252 1246 1085 101 101 110 1350 1150 48 26 37 23 10 144 8.6 1440 172 502
2B35-E-1249 1472 1252 1246 1085 134 134 144 1350 1150 36 28 41 27 14 102 9.1 1428 295.6 640
2B30-E-1391 1603 1394 1388 1208 110 110 120 1500 1280 40 29 10 157 7.5 1570 202 636
2B35-E-1402 1604 1405 1399 1208 134 134 144 1500 1280 48 31 46 28 10 157 7 1570 295.6 710
2B35-E-1390 1634 1393 1387 1208 138 134 148 1500 1280 48 31 46 24 14 113 14 1582 354.6 800
2B35-E-1578 1805 1581 1575 1433 140 140 156 1671 1485 60 28 41 15 16 109 16.9 1744 411.2 810

(2) Internal gear double-row ball slewing bearing model size parameters

 

Model Dimensions Installation Size Tooth Parameters Load Weight
De de di Di He Hi Ht Fe Fi N V L W m Z x·m Dp
[mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [-] [mm] [-] [mm] [-] [mm] [mm] [kN] [kg]
2B22-I-0625 705 627 623 504 83 83 92 675 575 32 17 25 9 8 65 520 98.6 95
2B22-I-0763 850 765 761 641 83 83 92 820 705 36 17 25 17 8 81 -4 648 128.4 128
2B20-I-0897 973 899 895 786 88 88 97 944 850 36 17 25 11 8 100 800 90.6 141
2B22-I-0885 982 887 883 754 88 88 97 944 826 36 21 31 14 8 95 -4 760 123.6 170
2B25-I-0972 1074 974 970 820 100 96 114 1035 910 40 21 10 84 840 152 234
2B22-I-1088 1172 1090 1085 962 88 88 97 1134 1040 36 17 25 11 10 98 980 113.4 193
2B25-I-1103 1200 1105 1099 963 96 96 110 1160 1040 36 21 31 12 10 98 980 124.6 239
2B30-I-1143 1250 1147 1141 998 99.5 99.5 110 1208 1080 36 21 31 12 10 100 -8 1000 182.6 276
2B28-I-1222 1345 1225 1219 1061.6 98 98 108 1290 1150 40 21 31 16 10 108 1080 146.6 331
2B30-I-1351 1470 1354 1348 1179 98 98 108 1425 1270 48 23 34 18 12 100 1200 171 365
2B40-I-1386 1530 1389 1383 1186 134 134 144 1480 1290 48 25 37 23 12 100 1200 226 627
2B30-I-1613 1750 1616 1610 1418.4 110 105 120 1705 1525 48 25 37 23 12 120 1440 186.2 564
2B45-I-1605 1780 1606 1602 1375 134 134 144 1710 1500 48 31 46 28 14 100 1400 274.8 840
2B35-I-1935 2100 1938 1932 1719 134 134 144 2035 1835 72 29 12 145 1740 228 965
2B35-I-2003 2178 2006 2000 1779 134 134 144 2108 1898 72 29 12 150 1800 228 1062

Application of double row ball slewing bearing

Double row slewing bearing is mainly used for wind turbine electrical equipment and concrete transportation pump trucks. In wind power equipment, the path is installed at the root of the propeller to act as a side propeller. The clearance must be zero or negative, and the starting friction torque is tremendous and with high rotation accuracy. In terms of its characteristics, this bearing has a compact structure, effectively saving the center diameter of the inner and outer ring mounting holes and improving the load-bearing capacity.

1. Wind turbine

The yaw and pitch bearing ring material are 42CrMo, the heat treatment adopts the overall quenching and tempering treatment, and the raceway surface is quenched. The force of yaw and pitch bearings is complex, and the impact and vibration are relatively significant. Therefore, the bearing is required to withstand both impact and large load. The life of the wind turbine main engine is 20 years, and the cost of bearing installation is relatively high. Therefore, the life of the yaw and pitch bearings must also reach 20 years. The hardness of the bearing ring matrix is ​​240-280HB, which can withstand impact without plastic deformation. At the same time, the surface quenching hardness of the raceway reaches 55-62HRC, which can increase the contact fatigue life and ensure the long life of the bearing.

2. Tower crane

The slewing bearing for the tower crane usually adopts a small four-point contact or double-row ball slewing bearing with a diameter of no more than 2 meters.

Company Information

We are a professional manufacturer and supplier of slewing bearings; We make all kinds of slewing bearings, such as four-point contact ball slewing bearings, single row cross roller slewing bearings, double-row ball slewing bearings, three-row roller slewing bearings, flange slewing bearings, light series slewing bearing. We are capable of designing and manufacturing non-standard slewing bearings independently. Our products are widely used in various applications, such as port, ship, vehicle, mining, engineering, lifting, environmental protection, oil, chemicals, light industry, metallurgical machinery, the military, etc. With 8 years of experience, our products are widely exported to the United States, Germany, Japan, Spain, Canada, Italy, France, Finland, South Korea, India, Singapore, Brazil, Australia, and other countries. If you need slewing bearing, please feel free to contact us.

FAQ

Q. Are you a factory or a trading company?

A: We are a manufacturer.

Q: Do you accept ODM&OEM orders?

A: Yes, we provide ODM&OEM services to worldwide customers, we can customize housings in different styles and sizes in other brands, and we also customize packaging boxes as per your requirements.

Q: Do you offer free samples?

A: Yes, we offer free small samples to distributors and wholesalers. Pls, note that if your bearings are more significant, we will send you the same materials/identical brands, for example. However, customers should bear the freight.

We DO NOT offer free samples to end-users.

Q: What’s the MOQ?

A: MOQ is 10pcs for standardized products; for customized products, MOQ should be negotiated in advance.

Q: How long is the lead time?

A: Normally, the lead time is about 3-7days. If it is a customized order, the lead time will be reconfirmed, about 10-15days.

Q: How to place orders?

A: 1. Email us the model, brand and quantity, consignee information, shipping way, and payment terms;

2. Proforma Invoice made and sent to you;

3. Complete Payment after confirmed the PI;

4. Confirm Payment and arrange the production.