20 Mm Linear Guides

CHTR linear guide rail has kind of sizes and length to suit various environments, keep the high precision preload and parallelism to move.
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Product Details

Different working environments require different loads and models of products. The kinds of linear guide rail could be cut for different lengths and models to splice and install, it’s high reliability and practicability.

CHTR linear guide guideway is designed with four columns arc grooves which increase the contract area, it has been greatly improve on the loading capacity, contact stiffness and system rigidity.

Linear guides are mainly used in mechanical structures with high precision requirements, such as grinding machines, lathes, woodworking machines, handling machines, transport devices, industrial automation machines, semiconductor machinery, packaging machines, 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 invention of the rolling bearing, in the form of wooden rollers supporting, or bearing, an object being moved is of great antiquity, and may predate the invention of the 

The invention of the rolling bearing, in the form of wooden rollers supporting, or bearing, an object being moved is of great antiquity, and may predate the invention of the wheel.

Though it is often claimed that the Egyptians used roller bearings in the form of tree trunks under sleds,[2] this is modern speculation.[3]They are depicted in their own drawings in the tomb of Djehutihotep [4] as moving massive stone blocks on sledges with liquid-lubricated runners which would constitute a plain bearing. There are also Egyptian drawings of bearings used with hand drills.[5]

The earliest recovered example of a rolling element bearing is a wooden ball bearing supporting a rotating table from the remains of the Roman Nemi ships in Lake Nemi, Italy. The wrecks were dated to 40 BC.

Leonardo da Vinci incorporated drawings of ball bearings in his design for a helicopter around the year 1500. This is the first recorded use of bearings in an aerospace design. However, Agostino Ramelli is the first to have published sketches of roller and thrust bearings.[2] An issue with ball and roller bearings is that the balls or rollers rub against each other causing additional friction which can be reduced by enclosing the balls or rollers within a cage. The captured, or caged, ball bearing was originally described by Galileo in the 17th century.

The first practical caged-roller bearing was invented in the mid-1740s by horologist John Harrison for his H3 marine timekeeper. This uses the bearing for a very limited oscillating motion but Harrison also used a similar bearing in a truly rotary application in a contemporaneous regulator clock.


Depending on the customized specifications (backing material and PTFE compounds), composite bearings can operate up to 30 years without maintenance.

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