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Oil Free Bushings（Page4）

Since bearings usually receive a lot of frictional resistance that generates heat, lubricants such as oil or grease are used to prevent the seizing or abnormal wear that this frictional heat could otherwise cause. Lubrication-free bushings don't need lubricating oil because the bearing body has a lubricating structure made possible by lubricating oil in the bearing body, or by embedded solid lubricant or the like. Since they don't need lubricating oil, lubrication-free bushings are often used for applications such as precision machinery that makes lubricating oil refilling difficult, and equipment with poor affinity to oil. They also greatly reduce maintenance costs by eliminating the need for regular lubrication and enabling stable operation over long periods. Lubrication-free bushings come in a variety of shapes that can be used for different applications as needed. Examples include straight bushings, collar bushings, flange bushings and housing bushings.

Type

120 items

: 30; 45; 60

Configure

Specification/Dimensions

Inner Dia. d(Ø)
1.5

2

2.5

03

3

04

4

4.5

05

5

06

6

7

8

08

9

10

11

12

13

14

15

16

17

18

19

20

22

24

25

26

27

28

30

31

31.5

32

35

36

38

40

42

45

50

52

55

58

60

63

65

68

70

75

78

80

85

90

95

100

110

120

130

140

150

160

170
Drawing

Clear

Outer Dia. D(Ø)
3

3.5

4

4.5

4.6

5

05

5.5

5.6

06

6

7

08

8

9

10

11

12

12$8$12$8

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

42

43.0

44

45

47

48

50

52

53.0

55

56

57

60

62

65

68

70

74

75

78

80

85

90

95

96

100

105

110

115

117

118

120

125

130

135

140

145

150

155

156

160

165

170

180

190
Drawing

Clear

Overall Length L(mm)
2

02

2.4

2.5

2.6

2.7

2.8

3

3.5

3.8

4

04

4.4

4.5

4.8

05

5

5.5

5.9

06

6

6.5

7

7.5

7.7

08

8

9

9.5

10

10.5

11

11.5

12

12.5

13

13.5

13.8

14

15

15.5

16

16.5

17

17.5

18

19

20

21

21.5

22

23

24

25

26

27

28

29

30

31.5

32

34

35

36

37

38

39

40

42

42.5

45

47

48

50

51

52

55

56

57

58

59

60

62

63

64

65

67

67.5

68

69

70

73

74

75

77

78

80

81

82

85

86

90

95

97

100

103

108

110

112

115

120

125

128

130

140

141

150

158

170

188

500
Drawing

Clear

Metal Type
- Bronze
- Brass
- Cast Iron
- Sintered Steel
Clear

Environment
- Standard
- Heat Resistant
- Foreign Object Resistant
- Vibration Resistant
- In Oil
- In Water
- In Seawater
- In Chemical
- Conformance to Food Sanitation Law
Clear

Resin Type
Clear

Multi-layer
Clear

Case Shape
Clear

Mounting Shaft Fits
- d8
- e7
- g6
- h6
- h7
- h9
- f8
- m6
- js6
- f7
Clear

Mounting Hole Fits
- G7
- H6
- H7
- M7
Clear

Lubrication
- Unlubricated
- Regular Lubrication
Clear

Thickness t(mm)
0.8

1

1.5

2

2.47

2.5

3

4

4.5

5

6

7.5

8

10
Drawing

Clear

Max. Allowable Surface Pressure P(N/mm²)
2.0

5

6

7

9.81

10

14.5

15

17.5

20.3

24.5

29

35

49

50

73

80

137

150
The value differs depending on the current lubrication. Refer to manufacturers' specifications.
Clear

Case Material
- Steel
- Aluminum
- Plastic
Clear

Max. Allowable Velocity V(m/s)
0.10

0.15

0.25

0.35

0.4

0.5

0.65

0.83

0.85

1

1.15

1.5

1.65

1.66

1.83

2.5

3.33
The value differs depending on the current lubrication. Refer to manufacturers' specifications.
Clear

Length Type
- Single
- Double
- Long
Clear

Max. Allowable PV Value Range(N/mm²•m/s)
- 0.3~1.0
- 1.1~2.0
- 2.1~5.0
Clear

Max. Allowable PV Value(N/mm²•m/s)
0.327

0.34

0.42

0.5

0.65

0.83

0.98

1

1.16

1.25

1.32

1.63

1.65

1.72

2.45

3.25

3.26

3.6
The value differs depending on the current lubrication. Refer to manufacturers' specifications.
Clear

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Clear

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6 Day(s) or Less

7 Day(s) or Less

8 Day(s) or Less

9 Day(s) or Less

10 Day(s) or Less

11 Day(s) or Less
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Oil Free Bushings（Page4）

Type

Configure

Specification/Dimensions

Inner Dia. d(Ø)

Outer Dia. D(Ø)

Overall Length L(mm)

Metal Type

Environment

Resin Type

Multi-layer

Case Shape

Mounting Shaft Fits

Mounting Hole Fits

Lubrication

Thickness t(mm)

Max. Allowable Surface Pressure P(N/mm2)

Case Material

Max. Allowable Velocity V(m/s)

Length Type

Max. Allowable PV Value Range(N/mm2•m/s)

Max. Allowable PV Value(N/mm2•m/s)

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Max. Allowable Surface Pressure P(N/mm²)

Max. Allowable PV Value Range(N/mm²•m/s)

Max. Allowable PV Value(N/mm²•m/s)