CNC Machine Linear Guides

CHTR linear guide rail have the good sealing performance, Sealed end caps at both ends ensure product long-life and performance.
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Product Details

Linear guides can maintain efficient linear motion, requiring clean and tidy working environment. Prevention of dust and other workshops iron chips

Sealing film is selected at the bottom, and the linear guideway fixing screw is equipped with anti biogenic screw hole cover to prevent dust accumulation.

Linear guides are mainly used in Pressing Machine, Woodworking Machine,  lathes, industrial automation machines, Container Switching Device,  etc.

Model

M

W

L

B

C

S

W1

W2

M1

F

TRH15B

28

34

61.8

26

26

M4×0.7×5

15

9.5

15

60

TRH20B

30

44

77.4

32

36

M5×0.8×6

20

12

18

60

TRH20BL

30

44

93.4

32

50

M5×0.8×6

20

12

18

60

TRH25B

40

48

83.5

35

35

M6×8

23

12.5

22

60

TRH25BL

40

48

102.6

35

50

M6×8

23

12.5

22

60

TRH30B

45

60

100.5

40

40

M8×10

28

16

26

80

TRH30BL

45

60

123

40

60

M8×10

28

16

26

80

TRH35B

55

70

113.9

50

50

M8×12

34

18

29

80

TRH35BL

55

70

139.2

50

72

M8×12

34

18

29

80

TRH45B

70

86

138.5

60

60

M10×17

45

20.5

38

105

TRH45BL

70

86

169.5

60

80

M10×17

45

20.5

38

105

TRH55B

80

100

163

75

75

M12×18

53

23.5

44

120

TRH55BL

80

100

201

75

95

M12×18

53

23.5

44

120


Data unit is mm

工厂图





The types of lubrication system can be categorized into three groups:[10]

  • Class I — bearings that require the application of a lubricant from an external source (e.g., oil, grease, etc.).

  • Class II — Bearings that contain a lubricant within the walls of the bearing (e.g., bronze, graphite, etc.,). Typically these bearings require an outside lubricant to achieve maximum performance.

  • Class III — bearings made of materials that are the lubricant. These bearings are typically considered "self-lubricating" and can run without an external lubricant.

Examples of the second type of bearing are Oilites and plastic bearings made from polyacetal; examples of the third type are metalized graphite bearings and PTFE bearings.[10]

Most plain bearings have a plain inner surface; however, some are grooved, such as spiral groove bearing. The grooves help lubrication enter the bearing and cover the whole journal.[28]

Self-lubricating plain bearings have a lubricant contained within the bearing walls. There are many forms of self-lubricating bearings. The first, and most common, are sintered metal bearings, which have porous walls. The porous walls draw oil in via capillary action[29] and release the oil when pressure or heat is applied.[30] An example of a sintered metal bearing in action can be seen in self-lubricating chains, which require no additional lubrication during operation. Another form is a solid one-piece metal bushing with a figure eight groove channel on the inner diameter that is filled with graphite. A similar bearing replaces the figure eight groove with holes plugged with graphite. This lubricates the bearing inside and out.[31] The last form is a plastic bearing, which has the lubricant molded into the bearing. The lubricant is released as the bearing is run in.[32]

There are three main types of lubrication: full-film conditionboundary condition, and dry condition. Full-film conditions are when the bearing's load is carried solely by a film of fluid lubricant and there is no contact between the two bearing surfaces. In mix or boundary conditions, load is carried partly by direct surface contact and partly by a film forming between the two. In a dry condition, the full load is carried by surface-to-surface contact.

Bearings that are made from bearing grade materials always run in the dry condition. The other two classes of plain bearings can run in all three conditions; the condition in which a bearing runs is dependent on the operating conditions, load, relative surface speed, clearance within the bearing, quality and quantity of lubricant, and temperature (affecting lubricant viscosity). If the plain bearing is not designed to run in the dry or boundary condition, it has a high coefficient of friction and wears out. Dry and boundary conditions may be experienced even in a fluid bearing when operating outside of its normal operating conditions; e.g., at startup and shutdown.


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