Double-Row Ball Combination Slewing Bearing

            

            

 

 

Designation

Boundary Dimension

Mounting Hole Size

Gear Data

Basic load

 ratings

Mass

No Gear

External Gear

Internal Gear

D

d

H

D1

D2

n

Φ

m

Da

Z

da

Z

b

x

Coa

(10KN)

(Kg)

020.25.500 021.25.500 023.25.500 616 384 106 580 420 20 18 5 645 126 355 72 60 0.5 121 100
  022.25.500 024.25.500 616 384 106 580 420 20 18 6 648 105 348 59 60 0.5 121 100
020.25.560 021.25.560 023.25.560 676 444 106 640 480 20 18 5 705 138 415 84 60 0.5 134 115
  022.25.560 024.25.560 676 444 106 640 480 20 18 6 708 115 408 69 60 0.5 134 115
020.25.630 021.25.630 023.25.630 746 514 106 710 550 24 18 6 792 129 480 81 60 0.5 153 130
  022.25.630 024.25.630 746 514 106 710 550 24 18 8 792 96 472 60 60 0.5 153 130
020.25.710 021.25.710 023.25.710 826 594 106 790 630 24 18 6 864 141 558 94 60 0.5 173 140
  022.25.710 024.25.710 826 594 106 790 630 24 18 8 864 105 552 70 60 0.5 173 140
020.30.800 021.30.800 023.30.800 942 658 124 898 702 30 22 8 984 120 616 78 80 0.5 230 200
  022.30.800 024.30.800 942 658 124 898 702 30 22 10 990 96 610 62 80 0.5 230 200
020.30.900 021.30.900 023.30.900 1042 758 124 998 802 30 22 8 1088 133 712 90 80 0.5 258 250
  022.30.900 024.30.900 1042 758 124 998 802 30 22 10 1090 106 710 72 80 0.5 258 250
020.30.1000 021.30.1000 023.30.1000 1142 858 124 1098 902 36 22 10 1200 117 810 82 80 0.5 286 300
  022.30.1000 024.30.1000 1142 858 124 1098 902 36 22 12 1200 97 792 67 80 0.5 286 300
020.30.1120 021.30.1120 023.30.1120 1262 978 124 1218 1022 36 22 10 1320 129 920 93 80 0.5 321 340
  022.30.1120 024.30.1120 1262 978 124 1218 1022 36 22 12 1320 107 912 77 80 0.5 321 340
020.40.1250 021.40.1250 023.40.1250 1426 1074 160 1374 1126 40 26 12 1500 122 1008 85 90 0.5 482 580
  022.40.1250 024.40.1250 1426 1074 160 1374 1126 40 26 14 1498 104 1008 73 90 0.5 482 580
020.40.1400 021.40.1400 023.40.1400 1576 1224 160 1524 1272 40 26 12 1644 134 1152 97 90 0.5 543 650
  022.40.1400 024.40.1400 1576 1224 160 1524 1272 40 26 14 1652 115 1148 83 90 0.5 543 650
020.40.1600 021.40.1600 023.40.1600 1776 1424 160 1724 1476 45 26 14 1848 129 1344 97 90 0.5 620 750
  022.40.1600 024.40.1600 1776 1424 160 1724 1476 45 26 16 1856 113 1344 85 90 0.5 620 750
020.40.1800 021.40.1800 023.40.1800 1976 1624 160 1924 1676 45 26 14 2058 144 1540 111 90 0.5 692 820
  022.40.1800 024.40.1800 1976 1624 160 1924 1676 45 26 16 2064 126 1536 97 90 0.5 692 820
020.50.2000 021.50.2000 023.50.2000 2215 1785 190 2149 1851 48 33 16 2304 141 1696 107 120 0.5 987 1150
  022.50.2000 024.50.2000 2215 1785 190 2149 1851 48 33 18 2304 125 1692 95 120 0.5 987 1150
020.50.2240 021.50.2240 023.50.2240 2455 2025 190 2389 2091 48 33 16 2544 156 1936 122 120 0.5 1110 1500
  022.50.2240 024.50.2240 2455 2025 190 2389 2091 48 33 18 2556 139 1926 108 120 0.5 1110 1500
020.50.2500 021.50.2500 023.50.2500 2715 2285 190 2649 2351 56 33 18 2804 153 2196 123 120 0.5 1110 1500
  022.50.2500 024.50.2500 2715 2285 190 2649 2351 56 33 20 2820 138 2180 110 120 0.5 1110 1500
020.50.2800 021.50.2800 023.50.2800 3015 2585 190 2949 2651 56 33 18 3114 170 2484 139 120 0.5 1390 1900
  022.50.2800 024.50.2800 3015 2585 190 2949 2651 56 33 20 3120 153 2480 125 120 0.5 1390 1900
020.60.3150 020.60.3150 020.60.3150 3428 2872 226 3338 2962 56 45 20 3540 174 2760 139 150 0.5 1870 3300
  020.60.3150 020.60.3150 3428 2872 226 3338 2962 56 45 22 3542 158 2750 126 150 0.5 1870 3300
020.60.3550 021.60.3550 023.60.3550 3828 3272 226 3738 3362 56 45 20 3940 194 3160 159 150 0.5 2110 3700
  022.60.3550 024.60.3550 3828 3272 226 3738 3362 56 45 22 3938 176 3168 145 150 0.5 2110 3700
020.60.4000 021.60.4000 023.60.4000 4278 3722 226 4188 3812 60 45 22 4400 197 3608 165 150 0.5 2370 4200
  022.60.4000 024.60.4000 4278 3722 226 4188 3812 60 45 25 4400 173 3600 145 150 0.5 2370 4200
020.60.4500 021.60.4500 023.60.4500 4778 4222 226 4688 4312 60 45 22 4884 219 4114 188 150 0.5 2670 4700
  022.60.4500 024.60.4500 4778 4222 226 4688 4312 60 45 25 4900 193 4100 165 150 0.5 2670 4700

 

Double-row Ball Slewing bearing

LYNB double-row ball slewing bearing can carry axial loads, tilting moment and radial loads at the same time. The top balls mainly carry the axial load and positive tilting moment. The drop balls take the opposite tilting moment. This is the reason why the loading capacity of the double row ball slewing bearing is larger than the four-point contact ball slewing bearing; However, the frictional ratio is larger than the latter.

LYNB double-row ball slewing bearing consists of inner ring, outer ring, balls in double rows, spacers, sealing device, etc. Because the top balls mainly take the axial load and tilting moment, the size of top balls are larger than the drop balls. In order to accommodate the various working condition at different axial load, tilting moments and axial load, the angle of contact would be adjusted accordingly.

The rings structure can be divided into two types, integral type and split type. Generally, the integral type maintains a stronger rigidity. The split type is more convenient to adjust; the two segregate rings are fastened by bolts before delivery.

LYNB double-row slewing bearing has cages(or spacers) among the balls. Only when large loading is requested, would the full ball type be applied. Loading capacity for full ball type is definitely larger, However, the increased friction generated by this design allows for the balls to be easily scratched.

The double-row slewing bearing is mainly for the working conditions when carrying axial load, larger tilting moment, and where the mounting place is limited in radial direction. This structure has smallest sensitive in mounting precision and deformation in axial and radial direction.

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

Without gear

External gear

Internal gear
 

▲ The design’s of all these slewing bearing are based on standard structures; LYNB can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNB Technical Center if you need any assistance in this area.

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