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Backstops are used extensively on pumps used in the primary and secondary cooling systems of power generating equipment.
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Roller freewheel one way bearing AA
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introduction

Roller freewheel one way bearing AA

Feature

Type AA is a roller type freewheel non-bearing supported. Bearings are required to support axial and radial loads. Lubrication and sealing must also be pro- vided by the installation.

 

Standard lubrication is oil. A typical installation is shown on the following page. The inner race is keyed to the shaft. The fit for centering of the outer race must be to H7 tolerance.

Connection of the outer race is via through bolts to grade10.9 or better.

 

This design can accept an axial misalignment of innerand outer race of ± S/2.

 

 

 

Type

Size

 

 

Overrunning Speeds

 

 

Weight

Dragtorque

AA

dH7

TKN1)

nimax2)

namax3)

Dh7

D5

D6

Z

L

 

 

TR

[mm]

[Nm]

[min-1]

[min-1]

[mm]

[mm]

[mm]

 

 

[mm]

[kg]

[Ncm]

12

17

3100

6000

47

28

20

3

20

0.21

0.7

15

55

2300

5400

55

37

26

3

30

0.44

3.5

20

146

2000

3600

68

50

35

4

34

0.7

8.4

25

285

1700

2600

90

68

45

6

37

1.3

14

30

500

1500

2100

100

75

50

6

44

2

23

35

720

1300

1950

110

80

55

6

48

2.6

60

40

1030

1200

1700

125

90

60

6

56

3.9

72

45

1125

1050

1500

130

95

65

8

56

4

140

50

2150

950

1300

150

110

75

8

63

6

180

55

2675

850

1200

160

115

82

8

67

7.2

190

60

3500

800

1100

170

125

90

10

78

9.2

240

70

5813

650

900

190

140

100

10

95

11.8

320

 

NOTES

1) T max = 2 × T KN
2) Inner race overruns
3) Outer race overruns
Keyway to DIN 6885.1

MOUNTING EXAMPLE





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