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BNS 5050

Precision ball screw BNS 5050
THK BNS 5050
THK Precision Ball Screw / Spline BNS5050

Description

Precision ball screw BNS 5050

THK BNS 5050

THK Precision Ball Screw / Spline BNS5050

Technical datas of BNS5050

Type

BNS Heavy-load Type Ball screw unit

image004

items

BNS5050

brand

THK

Belong

Precision Ball Screw/Spline

Model No.

BNS 5050

Screw shaft outer diameter#d

50 mm

Screw shaft inner diameter#db

36 mm

Lead Ph

50 mm

Basic load rating#Ca

31.8 kN

Basic load rating#Coa

77.6 kN

Ball center-to-center diameter#dp

52.2 mm

Thread minor diameter#dc

44.1 mm

Outer diameter#D

120 mm

Flange diameter#D1

156 mm

Overall length L1

126 mm

Ball screw dimensions#D3

100 mm

Ball screw dimensions#D4

90 mm

Ball screw dimensions#H

12 mm

Ball screw dimensions#B4

80 mm

Ball screw dimensions#B5

25 mm

Ball screw dimensions#Te

4 mm

Ball screw dimensions#P1

136 mm

Ball screw dimensions#P2

75 mm

Ball screw dimensions#S

M10 mm

Ball screw dimensions#t

28 mm

Ball screw dimensions#d1

11 mm

Ball screw dimensions#θ°

50

Support bearing basic load rating#Ca

62.2 kN

Support bearing basic load rating#Coa

83 kN

Nut inertial moment

58.2 kg•cm^2

Screw shaft inertial moment/mm

3.52 X10^-2 kg•cm^2/mm

Nut Mass

6.22 kg

Shaft mass

7.16 kg/m


Ball Screw/Spline BNS 5050 is a linear-rotary unit that contains Ball Screw grooves and Ball Spline grooves crossing with each other on a single shaft. The nuts of the Ball Screw and the Ball Spline have dedicated support bearings directly embedded on the circumference of the nuts.Ball Screw/Spline BNS5050 is capable of performing three (rotary, linear and spiral) modes of motion with a single shaft by rotating or stopping the ball screw nut or the spline nut.


Features of ball screw BNS5050
Zero axial clearance: The ball spline BNS 5050 has an angular-contact structure that causes no backlash in the rotational direction, enabling highly accurate positioning.
Light weight and compact: Since the ball screw nut is integrated with the ball screw support bearing of ball screw unit BNS5050, highly accurate and compact design is allowed. In addition, small inertia through the lightweight ball screw nut ensures high responsiveness.
Smooth motion with low noise: as the ball screw BNS 5050 is based on an end-cap mechanism, smooth motion with low noise is achieved.
Highly rigid supporting bearing been adopted: the supporting bearing on the ball screw BNS 5050 has a contact angle of 60°in the axial direction while that on the ball spline BNS 5050 has a contact angle of 30°in the moment direction, thus provide a highly rigid shaft support. In addtion, a dedicated rubber seal is attached as standard to prevent entry of foreign material.
Easy installation: the ball spline nut BNS 5050 is designed so that balls do not fall off even if the splne nut BNS 5050 is removed from the shaft, thus making installation easy. The ball screw, ball spline BNS 5050 can easily be mounted simple by securing it to the housing with bolts.


Structure of THK Precision Ball Screw / Spline BNS5050
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Application of precison ball screws BNS5050
BNS 5050 ball screws is optimal for machines using a combination of rotary and linear motions, such as assembly robot, automatic loader, and machining center’s automatic equipment.
image007
Extended ball screws available in Sun Rises Group Limited.

items

BNS5050

BNS1616

BNS2020

BNS2525

BNS3232

BNS4040

Screw shaft outer diameter#d(mm)

50

16

20

25

32

40

Screw shaft inner diameter#db(mm)

36

11

14

18

23

29

Lead Ph(mm)

50

16

20

25

32

40

Basic load rating#Ca kN

31.8

3.9

6.1

9.1

13

21.4

Basic load rating#Coa kN

77.6

7.2

12.3

19.3

29.8

49.7

Ball center-to-center diameter#dp mm

52.2

16.65

20.75

26

33.25

41.75

Thread minor diameter#dc mm

44.1

13.7

17.5

22

28.3

35.2

Outer diameter#D mm

120

52

62

72

80

110

Flange diameter#D1 mm

156

68

78

92

105

140

Overall length L1 mm

126

43.5

54

65

80

98

Ball screw dimensions#D3 mm

100

40

50

58

66

90

Ball screw dimensions#D4 mm

90

32

39

47

58

73

Ball screw dimensions#H mm

12

5

6

8

9

11

Ball screw dimensions#B4 mm

80

27.5

34

43

55

68

Ball screw dimensions#B5 mm

25

9

11

12.5

14

16.5

Ball screw dimensions#Te mm

4

2

2

3

3

3

Ball screw dimensions#P1 mm

136

60

70

81

91

123

Ball screw dimensions#P2 mm

75

25

31

38

48

61

Ball screw dimensions#S mm

M10

M4

M5

M6

M6

M8

Ball screw dimensions#t mm

28

12

16

19

19

22

Ball screw dimensions#d1 mm

11

4.5

4.5

5.5

6.6

9

Ball screw dimensions#θ°

50

40

40

40

40

50

Support bearing basic load rating#Ca kN

62.2

19.4

26.8

28.2

30

59.3

Support bearing basic load rating#Coa kN

83

19.2

29.3

33.3

39

74.1

Nut inertial moment kg•cm2

58.2

0.48

1.44

3.23

6.74

27.9

Screw shaft inertial moment/mm J kg•cm2/mm

3.52 x10-2

3.92x10-4

9.37x10-4

2.2x10-3

5.92x10-3

1.43x10-2

Nut Mass kg

6.22

0.38

0.68

1.1

1.74

3.95

Shaft mass kg/m

7.16

0.8

1.21

1.79

2.96

4.51

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