A ball screw is a mechanical device for translating rotational motion to linear motion. A threaded shaft provides a spiral raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads they can do so with minimum internal friction. They are made to close tolerances and are therefore suitable for use in situations in which high precision is necessary. The ball assembly acts as the nut while the threaded shaft is the screw.

Ball screws are used in aircraft and missiles to move control surfaces, especially for electric fly by wire. They are also used in machine tools, robots and precision assembly equipment. High precision ball screws are used in steppers for semiconductor manufacturing. Small ballscrews are often used to move the read heads of floppy discs and compact disc players.
In contrast to conventional leadscrews, ballscrews tend to be rather bulky, due to the need to have a mechanism to re-circulate the balls.

Model

Metric diameter

Journey

Stationary hole

Diameter of steel ball

Installation and connection dimension of screw cap (mm)

D1

D4

D5

D6

L

L1

L2

L7

L8

L9

L10

M

CIE-0801R

8

1

A

0.8

14

21

3.4

27

16

4

18

10

2

CIE-0802R

8

2

A

1.2

14

21

3.4

27

16

4

18

10

2

CIE-1002R

10

2

A

1.2

18

27

4.5

35

28

5

22

10

2.5

CIE-1004R

10

4

A

2

26

36

4.5

46

34

10

28

10

5

CIE-1204R

12

4

A

2.5

24

32

3.5

40

28

6

25

10

3

CIE-1402R

14

2

A

1.2

21

31

5.5

40

23

6

26

10

3

CIE-1604R

16

4

A

2.381

28

38

5.5

48

72

10

38

10

40

10

5

M6

CIE-1605R

16

5

A

3.175

28

38

5.5

48

82

10

42

10

40

10

5

M6

CIE-1605L

16

5

A

3.175

28

38

5.5

48

100

\

50

10

40

10

5

M6

CIE-1610R

16

10

A

3.175

28

38

5.5

48

118

\

57

10

40

10

5

M6

CIE-1616L

16

16

A

2.778

32

42

4.5

53

\

\

38

10

34

10

5

M6

CIE-2004R

20

4

A

2.381

36

47

6.6

58

72

10

38

10

44

10

55

M6

CIE-2005R

20

5

A

3.175

36

47

6.6

58

82

10

42

10

44

10

5

M6

CIE-2005L

20

5

A

3.175

36

47

6.6

58

101

\

51

10

44

10

5

M6

CIE-2020R

20

20

A

3.175

39

50

5.5

62

\

\

47

10

41

10

5

M6

CIE-2505R

25

5

A

3.175

40

51

6.6

62

82

10

42

10

48

10

5

M6

CIE-2505L

25

5

A

3.175

40

51

6.6

62

101

\

51

10

48

10

5

M6

CIE-2510R

25

10

A

4.763

40

51

6.6

62

10

75

10.5

48

10

5

M6

CIE-2525R

25

25

A

3.969

47

60

6.6

74

\

\

57

12

49

10

6

M6

CIE-3205R

32

5

A

3.175

50

65

9

80

111

10

55

12

62

10

6

M6

CIE-3205L

32

5

A

3.175

50

65

9

80

102

\

52

12

62

10

6

M6

CIE-3210R

32

10

A

6.35

53

65

9

80

135

16

69

12

62

10

6

M8*1

CIE-3210L

32

10

A

6.35

50

65

9

80

162

\

90

12

62

10

6

M6

CIE-4005R

40

5

B

3.175

63

78

9

93

108

10

57

14

70

10

7

M6

CIE-4010R

40

10

B

6.35

63

78

9

93

137

16

71

14

70

10

7

M8*1

CIE-4010L

40

10

B

6.35

63

78

9

93

165

\

93

14

70

10

7

M8

CIE-5010R

50

10

B

6.35

75

93

11

110

171

\

93

16

85

10

8

M8

CIE-5020R

50

20

B

7.144

75

93

11

110

280

\

138

16

85

10

8

M8

CIE-5050R

50

50

B

7.938

90

112

14

135

\

107

20

92

10

10

M6

CIE6310R

63

10

B

6.35

90

108

11

125

182

\

98

18

95

10

9

M8

6310(Germany)R

63

10

B

6.35

90

108

11

125

182

\

98

18

95

10

9

M8

CIE-6320R

63

20

B

9.525

90

115

13.5

135

290

\

149

20

100

10

10

M8

8010R

80

10

B

6.35

105

125

13.5

145

182

\

98

20

110

10

10

M8

8010(P5 GERMANY)R

80

10

B

6.35

105

125

13.5

145

182

\

98

20

110

10

10

M8

8020R

80

20

B

9.525

125

145

13.5

165

295

\

154

25

130

10

12.5

M8

Model

Ring number of ball bearing

Dynamic rated load CaKN

Static rated load CaKN

Rigidity KN/μm

F

FM

CIE-0801R

4

105.7

216

10.7

CIE-0802R

3

142.2

238.8

8.2

CIE-1002R

3

157.6

301.7

10.1

CIE-1004R

3

301.8

453.9

10.4

CIE-1204R

3

451

709.3

12.5

CIE-1402R

4

235.2

569.8

18.6

CIE-1604R

3

4.35

9.2

210

420

CIE-1605R

3

7.65

13.2

230

460

CIE-1605L

4

888.1

1525.4

22.1

43.1

CIE-1610R

3

716.4

1232

16.6

32.3

CIE-1616L

1.7*2

683.3

1298

18.6

\

CIE-2004R

3

5.3

12

220

440

CIE-2005R

3

8.6

17.1

240

480

CIE-2005L

4

999.3

1994.7

27.3

53.2

CIE-2020R

1.7*2

891.1

1795.2

23.2

\

CIE-2505R

3

1119.4

2581.4

33.8

65.8

CIE-2505L

4

1119.4

2581.4

33.8

65.8

CIE-2510R

3

1903.3

3695.3

34.5

CIE-2525R

1.7*2

1331.8

2805.4

29

\

CIE-3205R

5

1264.1

3402.8

42.8

83.5

CIE-3205L

4

1264.1

3402.8

42.8

83.5

CIE-3210R

3

3092.6

6101.6

44.2

86.2

CIE-3210L

4

3092.6

6101.6

44.2

86.2

CIE-4005R

5

1407.1

4341.5

53.2

103.7

CIE-4010R

3

3480

7979

54.6

106.4

CIE-4010L

4

3480

7979

54.6

106.4

CIE-5010R

4

3898

10325.7

67.5

131.6

CIE-5020R

4

4621.1

11881.3

67.9

132.3

CIE-5050R

1.7*2

4637.6

11221.9

58

\

CIE6310R

4

4401.9

13611.2

84.3

164.5

6310(Germany)R

4

4401.9

13611.2

84.3

164.5

CIE-6320R

4

7401.1

19008.8

85.7

167.2

8010R

4

4900

17366

106

207.4

8010(P5 GERMANY)R

4

4900

17366

106

207.4

8020R

4

8403.2

25345.1

108

210.1

1)Ball screw assembly is a high-precise mechanical drive part made up of screw, nut, ball bearing, sealing washer and other components, for there are ball bearing rolling between the screw and nut, the ball screw can receive high movement efficiency, compared with slide guide screw, the drive torque is under 1/3. So that it is easy to translate turning movement to straight-line movement, also, it is easy to translate straight-line movement to turning movement. It is a kind of further expansion and development of traditional slide guide screw. The profound significance of this development is the same as the transformation brought by rolling bearing to slide bearing. Due to its fine friction character, ball screw assembly is widely used in various industrial equipments, precise apparatus and precise numerically-controlled machine tool. Especially in recent years, work as executive unit of straight-line drive of numerically-controlled machine tool, it is broadly used in machine tool industry, and greatly promotes the numerically-controlled development of machine tool industry. All of these lie on several fine characters as follows: 
High drive efficiency, high orientation precision, reversibility of drive, long service life, good synchronous performance
Because the ball screw assembly has smooth operation, eliminates axial clearance, with consistency of production, when it adopts several sets of ball screw assembly projects to drive a same device or several same parts, it can receive excellent synchronous working.

Feature of ball screw

Precision of ball screw assembly

Selection step of ball screw

Safety use of ball screw assembly

1. Precision and testing method of precision of ball screw’s installation position:
2. Take axes A of Thread Groove as frame of reference to test run-out value of circumference at radial direction.
3. Take axes F, which lies in the supporting part of screw, as frame of reference to measure coaxial degree of accessories’ installation position.
4. Take axes E, which lies in the supporting part of screw shaft, as frame of reference to measure right angle degree of the surface of supporting part.
5. Take axes G of screw as frame of reference to measure right angle degree of screw cap’s datum plane or the installation surface of flange.
6. Take axes A of screw as frame of reference to measure coaxial degree of circle (cylinder type) of screw cap’s peripheral.
7. Take axes C of screw as frame of reference to measure parallelism of peripheral of screw cap (flat type installation surface)
8. General run-out valve of screw axes at radial direction.
9. The precisions here take JIS B 1191、1192 as standard.
10. B: Testing method of precision of installation position:
    Put the ball screw on V-shaped cushion iron of AA at the time of testing, meanwhile, let testing head of the two dial indicators vertically touch surface of axial column respectively, slowly turn guide screw and write down change range of reading of the two dial indicators, calculate max tolerance of the reading, that is required warp, then check the guide screw with checkout apparatus, control this warp within allowed range through the control to guide screw.
    Note: allowed error
11. When l6>l, the allowed error is t7a<=t7p(l7/l)
    When testing, put the ball screw in V-shaped cushion iron terrine of AA, let the gauge head vertically touch column surface of guide screw at the distance of 15, turn guide screw slowly, write down max tolerance value of the reading, test within fixed measuring interval over and over again to receive max value.
    Note: when l1<2l5, can be measure at l1/2.