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Large Slewing Ring Bearing Maintenance For Lifting Equipment

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The four-point contact ball bearings are radial single row angular contact ball bearings featuring raceways that can handle axial loads acting in both directions. A limited radial load can be supported for a given axial load.
Availability:
Quantity:
  • 011.45.1600

  • XZWD

  • 8482800000

In lifting equipment, the large diameter four point contact ball slewing bearing serves as a joint between the upper structure and the undercarriage, providing a means of 360-degree rotation. Lifting devices typically have a complex load spectrum: the slewing ring bearing can simultaneously handle all combinations of thrust, radial, and tilting moment loading. The use of a slewing ring bearing provides yet another benefit: its shaftless design eliminates the need for a spindle or kingpost. The center of the bearing remains open to allow passage of various hydraulic and control components.


Since the bearing is so critical, careful maintenance is necessary. More than 96% of slewing ring bearing failures are due to surface-originated lubrication problems, contamination, overloading, and improper installation and mounting fits. These surface failures occur much earlier than classical fatigue failures and are less predictable.


Inadequate lubrication is the most common cause of premature bearing failures. In slewing ring bearings, a heavy-duty, extreme pressure grease is required. When lubrication is inadequate, surface damage in the form of roughening or waviness occurs. Later, fine cracks develop, followed by flaking. Failures due to contamination are fairly common. Dirt or other debris within the lubrication system act as an abrasive and accelerate the wear. Usually the bearing raceways are scratched or indented, again leading to fine cracking and, ultimately, spalling.

inset_crane_bearings-wps图片


To get drawing (pdf),please clik on Model.

No External gear Dimensions (mm) Mounting Dimensions (mm) Structural Dimension (mm) Gear data

Gear force 

10^4 KN

weight
           kg
D d H D1 D2 n Φ dm L n1 D3 d1 H1 h b x M De z N T
1 011.20.200. 280 120 60 248 152 12 16 M14 28 2 201 199 50 10 40 0 3 300 98 1.5 2.1 24
2 011.20.224.
304 144 60 272 176 12 16 M14 28 2 225 223 50 10 40 0 3 321 105 1.5 2.1 25
3 011.20.250. 330 170 60 298 202 18 16 M14 28 2 251 249 50 10 40 0 4 352 86 2.1 2.8 30
4 011.20.280. 360 200 60 328 232 18 16 M14 28 2 281 279 50 10 40 0 4 384 94 1.5 2.8 34
5 011.25.315.
408 222 70 372 258 20 18 M16 32 2 316 314 60 10 50 0 5 435 85 2.9 4.4 52
6 011.25.355.
448 262 70 412 298 20 18 M16 32 2 356 354 60 10 50 0 5 475 93 2.9 4.4 59
7 011.25.400.
493 307 70 457 343 20 18 M16 32 2 401 399 60 10 50 0 6 528 86 3.5 5.3 69
8 011.25.450. 543 357 70 507 393 20 18 M16 32 2 451 449 60 10 50 0 6 576 94 3.5 5.3 76
9 011.30.500. 602 398 80 566 434 20 18 M16 32 4 501 499 498 70 10 60 0.5 5 629 123 3.7 5.2 85
012.25/30.500 6 628.8 102 4.5 6.2
10 011.30.560. 662 458 80 626 494 20 18 M16 32 4 561 559 558 70 10 60 0.5 5 689 135 3.7 5.2 95
012.25/30.560 6 688.8 112 4.5 6.2
11 011.30.630. 732 528 80 696 564 24 18 M16 32 4 631 629 628 70 10 60 0.5 6 772.8 126 4.5 6.2 110
012.25/30.630 8 774.4 94 6 8.3/8.2
12 011.30.710. 812 608 80 776 644 24 18 M16 32 4 711 709 708 70 10 60 0.5 6 850.8 139 4.5 6.2 120
012.25/30.710 8 854.4 104 6 8.9/8.3
13 011.40.800. 922 678 100 878 722 30 22 M20 40 6 801 798 90 10 80 0.5 8 966.4 118 8 11.1 220
012.30/40.800 10 968 94 10 14.1/14
14 011.40.900. 1022 778 100 978 822 30 22 M20 40 6 901 898 90 10 80 0.5 8 1062.4 130 8 11.1 240
012.30/40.900 10 1068 104 10 14
15 011.40.1000 1122 878 100 1078 922 36 22 M20 40 6 1001 998 90 10 80 0.5 10 1188 116 10 14 270
012.30/40.1000 12 1185.6 96 12 16.7
16 011.40.1120 1242 998 100 1198 1042 36 22 M20 40 6 1121 1118 90 10 80 0.5 10 1298 127 10 14 300
012.30/40.1120 12 1305.6 106 12 16.7
17 011.45.1250 1390 1110 110 1337 1163 40 26 M24 48 5 1252 1248 100 10 90 0.5 12 1449.6 118 13.5 18.8 420
012.35/45.1250 14 1453.2 101 15.8 21.9
18 011.45.1400 1540 1260 110 1487 1313 40 26 M24 48 5 1402 1398 100 10 90 0.5 12 1605.6 131 13.5 18.8 480
012.35/45.1400 14 1607.2 112 15.5 21.9
19 011.45.1600 1740 1460 110 1687 1513 45 26 M24 48 5 1602 1598 100 10 90 0.5 14 1817.2 127 15.8 21.9 550
012.35/45.1600 16 1820.8 111 18.1 25
20 011.45.1800 1940 1660 110 1887 1713 45 26 M24 48 5 1801
           1802
1798 100 10 90 0.5 14 2013.2 141 15.8 21.9 610
012.35/45.1800 16 2012.8 123 18.1 25
21 011.40/60.2000 2178 1825 144 2110 1891 48 33 M30 60 8 2001
           2002
1998 132 12 120 0.5 16 2268.8 139 24.1 33.3 1100
012.40/60.2000 18 2264.4 123 27.1 37.5
22 011.40/60.2240 2418 2065 144 2350 2131 48 33 M30 60 8 2241
           2242
2238 132 12 120 0.5 16 2492.8 153 24.1 33.3 1250
012.40/60.2240 18 2498.4 136 27.1 37.5
23 011.40/60.2500 2678 2325 144 2610 2391 56 33 M30 60 8 2501
           2502
2498 132 12 120 0.5 18 2768.4 151 27.1 37.5 1400
012.40/60.2500 20 2776 136 30.1 41.8
24 011.40/60.2800 2978 2625 144 2910 2691 56 33 M30 60 8 2802 2798 132 12 120 0.5 18 3074.4 168 27.1 37.5 1600
012.40/60.2800 20 3076 151 30.1 41.8
25 011.50/75.3150 3376 2922 174 3286 3014 56 45 M42 84 8 3152 3147 162 12 150 0.5 20 3476 171 37.7 52.2 2800
012.50/75.3150 22 3471.6 155 41.5 57.4


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