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618 Series Bearing

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Precision Deep Groove Ball Bearing

Series

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Series

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618 series bearing details

The Deep Groove Ball Bearing 618 Series is one of the most representative rolling bearings. A simple structure and convenient usage characterize it. This type of bearings is widely used to bear radial load. This bearing can behave as “Angular Contact Ball Bearing” when the radial clearance increases to simultaneously support the axial and radial loads. Under the situation when the rotational speed is high and the thrust ball bearing is not recommended,  the Deep Groove Ball Bearing can be adopted to support the axial load.

Deep Groove Ball Bearing has a lower frictional coefficient and a higher rotational speed limit than the other bearings. With larger radial clearance, the axial carrying load can be increased. When it only bears the radial load, the contact angle should be zero; when it takes an axial load, the contact angle should be greater than zero. A stamped ribbon cage is commonly machined as a solid cage; sometimes, the nylon cage can also be used.

After the deep groove ball bearing is mounted on the shaft, within the axial clearance of the bearing, the axial displacement of the shaft or the housing in both directions can be limited so that it can be used for axial positioning in both directions. In addition, the bearing also has some self-aligning capability; when it is tilted to 2' ~ 10' corresponding to the housing, it still can be operated normally, but there may be a particular influence on the bearing life. The deep groove ball bearing cage is commonly the stamped steel ribbon shape, and the machined metal solid cage is also used for significant bearing.

The deep groove ball bearings 618 series are the most commonly used rolling bearing. It has a simple structure and is easy to use. It is mainly used to bear the radial load; when the radial clearance of bearing is increased, it will show specific angular contact ball bearing performances and withstand radial and axial integrated load. When the speed is too high, and the thrust ball bearing can not be used, it can also bear only the axial load. Compared with other types of bearings with the exact sizes, it has a small friction coefficient and high limiting speeds, but it can not bear the impact and is unsuitable for taking a big load.

Precision Deep Groove Ball Bearings (618 series I)

Dimensions Basic Load Rating Designation Weight Installation Size Limiting Speed
mm kN kg mm r/min
d D B rmin Cr Cor damin Damax ramax Grease Oil
100 125 13 1 19.6 21.2 61820 0.31 105 120 1 4800 5700
110 140 16 1 28.1 30.7 61822 0.61 115 135 1 4300 5100
120 150 16 1 29.0 33.0 61824 0.66 125 145 1 4000 4700
130 165 18 1.1 36.9 41.2 61826 0.94 136.5 158.5 1 3600 4300
140 175 18 1.1 38.2 44.4 61828 1.0 146.5 168.5 1 3400 4000
150 190 20 1.1 49.1 58.5 61830 1.15 156.6 183.5 1 3000 3600
160 200 20 1.1 48.5 61 61832 1.23 166.5 193.5 1 2800 3400
170 215 22 1.1 61.5 78 61834 1.9 176.5 208.5 1 2600 3200
180 225 22 1.1 62.3 78.5 61836 1.72 186.5 218.5 1 2400 3000
190 240 24 1.5 75.1 93.5 61838 2.53 198 232 1.5 2200 2800
200 250 24 1.5 74 98 61840 2.67 208 242 1.5 2200 2800
220 270 24 1.5 76.5 97.8 61844 2.9 228 262 1.5 1900 2400
240 300 28 2 83.5 108 61848 4.48 249 291 2 1800 2200
260 320 28 2 101 148 61852 4.84 269 311 2 1700 2000
280 350 33 2 133 191 61856 7.2 289 341 2 1600 1900

Precision Deep Groove Ball Bearings (618 series II)

Dimensions Basic Load Rating Designation Weight Installation Size Limiting Speed
mm kN kg mm r/min
d D B rmin Cr Cor damin Damax ramax Grease Oil
300 380 38 2.1 166 233 61860 10.3 311 369 2 1400 1700
320 400 38 2.1 168 244 61864 10.8 331 389 2 1300 1600
340 420 38 2.1 175 265 61868 11.5 351 409 2 1200 1500
360 440 38 2.1 192 290 61872 11.8 371 429 2 1100 1400
380 480 46 2.1 238 375 61876 19.5 391 469 2 1000 1300
400 500 46 2.1 241 390 61880 20.5 411 489 2 1000 1300
420 520 46 2.1 245 410 61884 21.4 431 509 2 950 1200
440 540 46 2.1 249 425 61888 22.3 451 529 2 900 1100
460 580 56 3 310 550 61892 34.3 473 567 2.5 900 1100
480 600 56 3 315 575 61896 35.4 493 587 2.5 850 1000
500 620 56 3 320 600 618/500 37.2 513 607 2.5 800 950
530 650 56 3 325 625 618/530 39.8 543 637 2.5 750 900
560 680 56 3 330 650 618/560 41.5 573 667 2.5 700 850
600 730 60 3 355 735 618/600 50.9 613 717 2.5 670 800

Precision Deep Groove Ball Bearings (618 series III)

Dimensions Basic Load Rating Designation Weight Installation Size Limiting Speed
mm kN kg mm r/min
d D B rmin Cr Cor damin Damax ramax Grease Oil
630 780 69 4 420 890 618/630 71.3 646 767 3 630 750
670 820 69 4 435 965 618/670 75.4 686 807 3 560 670
710 870 74 4 480 1100 618/710 92.6 726 854 3 530 630
750 920 78 5 525 1260 618/750 110 770 900 4 500 600
800 980 82 5 530 1310 618/800 132 820 960 4 450 530
850 1030 82 5 559 1430 618/850 140 868 1012 4 410 470
900 1090 85 5 618 1532 618/900 160 920 1070 4 350 410
950 1150 90 5 637 1730 618/950 190 968 1132 4 290 350

 

Note:
1. Rate and speed in the catalog are changed with the change of contact angle; please consult our technical department. 2. Our company can also produce diameter series seven bearings(Super thin- section), please consult our technical department.

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