Hiwin Linear Rail Hgr20 L1500mm CNC Parts Hgw20ca Linear Guide Rails Block CNC Parts

Hiwin Linear Rail Hgr20 L1500mm CNC Parts Hgw20ca Linear Guide Rails Block CNC Parts

​CHTR linear guide rail has several years of experience doing technical, so our prodcution is base of the quality.
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Product Details

With the help of various marketing activities and broadcasting channels, the sales volume of our high-tech and high-quality 30mm linear rail, 20mm linear shaft, Woodworking Machinery Linear Guides has increased significantly. We are aiming to become an enterprise that the society expects to exist, and we continue to accept new challenges. Over the years, we have provided services to major enterprises, able to predict problems in time and provide effective solutions for customers. With the tenet of 'faith-based, customer first', we welcome clients to call or e-mail us for cooperation. Since our establishment, we keep on improving our products and customer service.

The motion of linear guideway is realized by rolling of steel ball, there will be no deviation or slipping phenomenon when it makes linear guide run.

The frictional force is very small when the linear guideway moves. detected by laser and other advanced process.

Linear guides are mainly used in mechanical structures with high precision requirements, such as grinding machines.


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




Oil whirl can be prevented by a stabilising force applied to the journal. A number of bearing designs seek to use bearing geometry to either provide an obstacle to the whirling fluid or to provide a stabilising load to minimize whirl. One such is called the lemon bore or elliptical bore. In this design, shims are installed between the two halves of the bearing housing and then the bore is machined to size. After the shims are removed, the bore resembles a lemon shape, which decreases the clearance in one direction of the bore and increases the pre-load in that direction. The disadvantage of this design is its lower load carrying capacity, as compared to typical journal bearings. It is also still susceptible to oil whirl at high speeds, however its cost is relatively low.


Another design is the pressure dam or dammed groove,[35] which has a shallow relief cut in the center of the bearing over the top half of the bearing. The groove abruptly stops in order to create a downward force to stabilize the journal. This design has a high load capacity and corrects most oil whirl situations. The disadvantage is that it only works in one direction. Offsetting the bearing halves does the same thing as the pressure dam. The only difference is the load capacity increases as the offset increases.[11]

A more radical design is the tilting-pad design, which uses multiple pads that are designed to move with changing loads. It is usually used in very large applications but also finds extensive application in modern turbomachinery because it almost completely eliminates oil whirl.



One disadvantage specific to fluid-lubricated, hydrodynamic journal bearings in high-speed machinery is oil whirl—a self-excited vibration of the journal. Oil whirl occurs when the lubrication wedge becomes unstable: small disturbances of the journal result in reaction forces from the oil film, which cause further movement, causing both the oil film and the journal to "whirl" around the bearing shell. Typically the whirl frequency is around 42% of the journal turning speed. In extreme cases oil whirl leads to direct contact between the journal and the bearing, which quickly wears out the bearing. In some cases the frequency of the whirl coincides with and "locks on to" the critical speed of the machine shaft; this condition is known as "oil whip". Oil whip can be very destructive.


At present, we are striving our best to become amongst the ideal exporters inside our industry to satisfy shoppers more want for Hiwin Linear Rail Hgr20 L1500mm CNC Parts Hgw20ca Linear Guide Rails Block CNC Parts. We believe we can satisfy you with our high-quality products and perfect service. Our products meet the relevant technical standards, and customer satisfaction has always been our pursuit.
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