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Double Row Ball Slewing Bearing

Double Row Ball Slewing Bearing usually include same size rolling element and different size rolling element. The heavy duty turntable bearingsis composed with two rows ball which can bear much higher axial, radial and overturning moment that is widely used on heavy equipment, like mining equipment and large crawler crane. As one of the professional slew ring bearing manufacturers, SWBTEC double row slewing bearinghas been assembled on many customer's machine, and have received high reputation from end user, as we can help the end user to maximize their machine and provide timely and effective after-sales service and technical support of the ball bearing swing.

Double Row Ball Slewing Bearing Features and Benefits

SWBTEC recommend customers to choose double-row slewing bearing according to the customer's requirements for bearing load capacity.

The double row ball slewing bearing can withstand larger axial loads, appropriate radial loads and overturning moments. Compared with three-row slewing bearings, the double row slewing bearing can lower procurement costs for customers.

The three row roller slewing bearing meets the requirements of small size and large load. However, when the eccentricity of the axial load is relatively small, the bearing capacity of the three-row slewing bearing is rich and the cost is relatively high.

Our company engineers have strong product design capabilities, please feel free to contact us if you need double row slewing bearing.

Double Row Ball Slewing Bearing Application

Double row slewing bearing is a kind of slewing bearing which is used on ship cranes. There are generally 4 pieces of slewing bearings on ships to share the loading and unloading operations of the ship, and the service life is generally required to be 6-10 years. Therefore, it is very important to ensure the reliability and durability of the slewing bearings.

The characteristics of marine slewing bearings are high flexibility, and relatively high rotational speed and the load is generally between 15-30 tons, so four-point contact ball bearings are widely used. But what are the design features and advantages of single-row and double-row ball bearings?

First of all, the height of the single row ball slewing bearing should be high, and the steel ball should be 60-70mm to ensure that the bearing capacity is competent and the sealing performance is better. In the early use of the bearing, the application is very high, and the user feedback is good. The characteristic is that the height is high and the steel ball is enlarged, which improves the rigidity and strength of the bearing and is a very good choice.

The double row ball bearing is based on the consideration of flexibility of the slewing bearing, and the structural consideration which increased to reduce the excessive fatigue of the raceway and the steel ball, thereby improving the life and stability of the slewing bearing. The design considerations are perfect, but the application process is flawed, and the raceway force sometimes appears eccentric.

Combining the slewing bearings of the two structures, because the starting points are slightly different, they both have a good and stable record on the ship crane. From the feedback, the advantages and disadvantages are not obvious, and both structures are still good choices. Of course, the price of double-row slewing bearings is significantly higher than that single-row slewing bearings. And we can provide competitive slewing bearing pricefor you.

Double Row Ball Slewing Bearing Specifications

Model

Configuration Size

Mounting Size

Structural Size

Gear Data

weight kg

D

d

H

D1

D2

n1

φ

n2

φ2

H1

h

B

module

Da

Z

1

SW-476.25

565

382

98

540

410

24

17

24

17

88

10

60

5

595

117

88

2

SW-576.20

670

470

92

640

508

18

17

18

17

83

9

60

5

695

136

110

3

SW-691.25

785

590

99

753

628

21

36

21

36

89

10

89

10

836

81

138

4

SW-968.22

1042

893

92

1015

922

30

17

30

17

83

9

76

8

1080

133

155

5

SW-1215.25

1330

1095

108

1290

1135

48

23

48

23

98

10

90

10

1378

136

345

6

SW-1248.40

1414

1085

144

1359

1139

44

28

44

28

135

9

115

12

1474

120

500

7

SW-1578.40

1744

1433

156

1671

1485

60

28

60

28

140

16

140

16

1805

109

910

Model

Configuration Size

Mounting Size

Structural Size

Gear Data

weight kg

D

d

H

D1

D2

n1

φ

n2

φ2

H1

h

B

module

da

Z

1

SW-755.25

875

628

104

823

675

40

26

40

26

95

9

81

10

582

59

200

2

SW-888.22

982

792

97

944

826

36

22

36

22

87

10

80

8

754

95

170

3

SW-1088.20

1172

1010

97

1134

1040

36

17

36

17

88

9

80

10

962

97

175

4

SW-1100.25

1196

1010

110

1160

1040

36

31

36

31

96

14

90

10

98

240

5

SW-1222.25

1345

1115

108

1290

1150

40

21

40

21

98

10

88

10

108

360

6

SW-1350.30

1470

1230

108

1425

1270

48

34

48

34

98

10

90

12

1179

100

365



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