What does the term ″self-lubricating bushing″ or oil free bushings refer to?

The term ″self-lubricating bushing″ or oil free bushings refers to a type of bearing or sleeve that has the ability to provide lubrication to reduce friction without requiring external lubricants like oil or grease. These bushings are designed with embedded solid lubricants, such as graphite or PTFE (Teflon), which release lubrication during operation. They are commonly used in various applications where low friction, smooth operation, and maintenance-free performance are desired, such as in machinery, automotive components, and industrial equipment.

Should you apply grease or oil to bronze bushings?

In general, bronze bushings do not need additional grease or oil. They are self-lubricating or oil free bushings and don't require external lubrication. However, if there is excessive friction or wear, a small amount of compatible oil or grease can be applied. It's best to follow the manufacturer's recommendations or seek professional advice for specific bronze bushings.

What materials are typically used to manufacture oil free bushings?

Oil free bushings are usually made from materials like bronze, brass, steel, PTFE (Teflon), nylon, and composites. These materials have built-in lubrication properties, reducing the need for external lubricants. Bronze and brass are durable choices, steel is strong, PTFE offers low friction, nylon is lightweight, and composites provide a balance of strength and self-lubrication. Material selection depends on specific application requirements.

Are bronze bushing self-lubricating?

Yes, bronze bushings are self-lubricating. They contain built-in solid lubricants like graphite or PTFE. This means they can provide lubrication on their own, reducing friction and wear. They don't require additional external lubrication, making them convenient and suitable for various applications.

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NTN Oil Free Bushings（Inner Dia. d：04）

NTN offers products Oil Free Bushings specified by Inner Dia. d 04 from Automation Components product category. There are a total of 1 items. Search and select detailed specifications of parts for your machine with free CAD downloads. NTN products are available to order through MISUMI online 24 hours a day. Free shipping, no minimum order.

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Type	Straight/sleeve Flanged Type Standard/Pilot/Center-Flanged Type Housing Unit Type
Brand	(0) (0) DAIDO METAL (0) IGUS (0) NTN (1) OILES (0) ZOB (0)
CAD	2D 3D
Days to Ship	All Same day 5 Day(s) or Less 6 Day(s) or Less 7 Day(s) or Less 8 Day(s) or Less Others

1 items

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Sintered Oil Retaining Bearing Bearphite

NTN

Unique material with natural high quality fine graphite powder added. Superior in silent properties.

Type	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)
Straight/sleeve / Standard/Pilot/Center-Flanged Type	4	6	4 ～ 5	Brass	Standard	-	-	-	-	-	Unlubricated	1	7	-	1.83	Single	1.1~2.0	0.83

From: ₹ 195.99
Days to Ship: 5 Day(s) or more

5 Day(s) or more


Brand
Product Series
From
Days to Ship
Type
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)

	You can add up to 6 items per a category to the compare list.Compare
Brand	NTN
Product Series	Sintered Oil Retaining Bearing Bearphite
From	₹ 195.99-
Days to Ship	5 Day(s) or more
Type	Straight/sleeve / Standard/Pilot/Center-Flanged Type
Inner Dia. d(Ø)	4
Outer Dia. D(Ø)	6
Overall Length L(mm)	4 ～ 5
Metal Type	Brass
Environment	Standard
Resin Type	-
Multi-layer	-
Case Shape	-
Mounting Shaft Fits	-
Mounting Hole Fits	-
Lubrication	Unlubricated
Thickness t(mm)	1
Max. Allowable Surface Pressure P(N/mm²)	7
Case Material	-
Max. Allowable Velocity V(m/s)	1.83
Length Type	Single
Max. Allowable PV Value Range(N/mm²•m/s)	1.1~2.0
Max. Allowable PV Value(N/mm²•m/s)	0.83

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

03

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
- POM (Polyacetal)
- PTFE (Polytetrafluoroethylene)
- High Performance Polymer Composition
- Polyphenylenesulfide
Clear

Multi-layer
- Steel, Sintered Bronze, Polytetrafluoroethylene
- Steel, Sintered Bronze, Polyacetal
- Steel, Copper Type Sintered Alloy
- Metal Mesh, Polytetrafluoroethylene
- Aluminum, Fluororesin
- Polyacetal
Clear

Case Shape
- Round Flange
- Square Flange
- Oval Shaped Flange
- Pillow Type
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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- NTN (1)
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- ZOB (0)
Clear

Related Categories to Oil Free Bushings

- Oil Free Bushings

FAQ Oil Free Bushings

Question: What does the term ″self-lubricating bushing″ or oil free bushings refer to?: Answer: The term ″self-lubricating bushing″ or oil free bushings refers to a type of bearing or sleeve that has the ability to provide lubrication to reduce friction without requiring external lubricants like oil or grease. These bushings are designed with embedded solid lubricants, such as graphite or PTFE (Teflon), which release lubrication during operation. They are commonly used in various applications where low friction, smooth operation, and maintenance-free performance are desired, such as in machinery, automotive components, and industrial equipment.
Question: Should you apply grease or oil to bronze bushings?: Answer: In general, bronze bushings do not need additional grease or oil. They are self-lubricating or oil free bushings and don't require external lubrication. However, if there is excessive friction or wear, a small amount of compatible oil or grease can be applied. It's best to follow the manufacturer's recommendations or seek professional advice for specific bronze bushings.
Question: What materials are typically used to manufacture oil free bushings?: Answer: Oil free bushings are usually made from materials like bronze, brass, steel, PTFE (Teflon), nylon, and composites. These materials have built-in lubrication properties, reducing the need for external lubricants. Bronze and brass are durable choices, steel is strong, PTFE offers low friction, nylon is lightweight, and composites provide a balance of strength and self-lubrication. Material selection depends on specific application requirements.
Question: Are bronze bushing self-lubricating?: Answer: Yes, bronze bushings are self-lubricating. They contain built-in solid lubricants like graphite or PTFE. This means they can provide lubrication on their own, reducing friction and wear. They don't require additional external lubrication, making them convenient and suitable for various applications.