What are stainless steel spherical plain bearings?

Nov 11, 2025

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Spherical plain bearing

What are stainless steel spherical plain bearings?

Stainless steel spherical plain bearings, also called rod end bearings, are a special type of sliding bearing. Their inner and outer raceways are spherical, and the rolling elements are spherical sliders, allowing for multi-angle relative oscillation.

Unlike ordinary bearings, their most significant characteristic is their ability to withstand large angular displacements. They are suitable for complex operating conditions. Due to their stainless steel material, they possess excellent corrosion resistance, but are susceptible to rust and damage in harsh environments such as humid, acidic, or alkaline conditions. Stainless steel spherical plain bearings, with their corrosion resistance and multi-angle oscillation capability, ensure the smooth steering of steering gears. They are widely used in fields requiring high corrosion resistance and smooth joint movement, ensuring safe navigation for ships.

 

Stainless Steel Spherical Joint Bearing Size and Model Comparison Table

 

aring

Number

(Dimensions)

 

Load ratings

Weight

d

d3

6H

B

C1

W

h1

d2

L4

L5

d4

d5

dk

L3

min

a

dyn.c

statc

SI5T/K

5

M5×0.8

8

6

9

27

18

36

4

8.5

11

11.11

10

13

5.70

6.00

16

SI6T/K

6

M6×1.0

9

6.75

11

30

20

40

5

10

13

12.70

12

13

7.20

7.65

22

SI8T/K

8

M8×1.25

12

9

14

36

24

48

5

12.5

16

15.8753

16

14

11.6

12.9

47

SI10T/K

10

M10×1.5

14

10.5

17

43

28

57

6.5

15

19

19.05

20

13

14.5

18.0

77

SI10-1T/K

10

M10x1.25

14

10.5

17

43

28

57

6.5

15

19

19.05

20

13

14.5

18.0

77

SI12T/K

12

M12x1.75

16

12

19

50

32

66

6.5

17.5

22

22.225

22

13

17.0

24.0

100

SI12-1T/K

12

M12x1.25

16

12

19

50

32

66

6.5

17.5

22

22.225

22

13

17.0

24.0

100

SI14T/K

14

M14×2.0

19

13.5

22

57

36

75

8

20

25

25.40

25

16

24.0

31.0

160

SI14-1T/K

14

M4x1.5

19

13.5

22

57

36

75

8

20

25

25.40

25

16

24.0

31.0

160

SI16T/K

16

M16×2.0

21

15

24

64

40

84

8

22

27

28.575

28

15

28.5

39.0

220

SI16-1T/K

16

M16×1.5

21

15

24

64

40

84

8

22

27

28.575

28

15

28.5

39.0

220

SI18T/K

18

M18×1.5

23

16.5

27

71

44

93

10

25

31

31.75

32

15

42.5

47.5

320

SI20T/K

20

M20x1.5

25

18

30

77

50

102

10

27.5

34

34.925

33

14

42.5

57.0

420

SI22T/K

22

M22×1.5

28

20

32

84

54

111

12

30

38

38.10

37

15

57.0

68.0

540

SI25T/K

25

M24×2.0

31

22

36

94

60

124

12

33.5

42

42.85

42

15

68.0

85.0

720

SI28T/K

28

M27×2.0

35

24

41

103

66

136

14

37

46

47.60

51

15

86.0

107.0

820

SI30T/K

30

M30x2.0

37

25

41

110

70

145

15

40

50

50.80

51

17

88.0

114.0

1100

SI30-1T/K

30

M27×2.0

37

25

41

110

70

145

15

40

50

50.80

51

17

88.0

114.0

1100

SI35T/K

35

M36×2.0

43

28

50

125

81

165.5

17

46

58

57.10

56

16

101

206

1600

SI40T/K

40

M42x2.0

49

33

55

142

91

187.5

19

53

65

66.60

60

17

124

280

2400

SI50T/K

50

M48×2.0

60

45

65

160

117

218.5

23

65

75

82.50

65

12

308

485

5000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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