Model No.

Screw
shaft OD
d

Lead
l

Ball center-to-
center diameter
dp

Thread minor
diameter

d3

No. of
loaded
circuits/
Rows×turns

Basic load rating

Note) 1
Rigidity
K
N/μm

Ca
kN

C0a
kN

BTK 1006-2.6

10

6

10.5

7.8

1×2.65

2.8

4.9

88

BTK 1208-2.6

12

8

12.65

9.7

1×2.65

3.8

6.8

108

BTK 1404-3.6

14

4

14.4

11.5

1×3.65

5.5

11.5

150

BTK 1405-2.6

5

14.5

11.2

1×2.65

5.0

11.4

116

BTK 1605-2.6

16

5

16.75

13.5

1×2.65

5.4

13.3

130

BTK 1808-3.6

18

8

19.3

14.4

1×3.65

13.1

31.0

210

BTK 2005-2.6

20

5

20.5

17.2

1×2.65

6.0

16.5

150

BTK 2010-2.6

10

21.25

16.4

1×2.65

10.6

25.1

160

BTK 2505-2.6

25

5

25.5

22.2

1×2.65

6.7

20.8

180

BTK 2510-5.3

10

26.8

20.2

2×2.65

31.2

83.7

400

BTK 2806-2.6

28

6

28.5

25.2

1×2.65

7.0

23.4

200

BTK 2806-5.3

28.5

25.2

2×2.65

12.8

46.8

390

BTK 3210-2.6

32

10

33.75

27.2

1×2.65

19.8

53.8

250

BTK 3210-5.3

33.75

27.2

2×2.65

36.0

107.5

490

BTK 3610-2.6

36

10

37.0

30.5

1×2.65

20.8

59.8

270

BTK 3610-5.3

37.0

30.5

2×2.65

37.8

118.7

530

BTK 4010-5.3

40

10

41.75

35.2

2×2.65

40.3

134.9

590

BTK 4512-5.3

45

12

46.5

39.2

2×2.65

49.5

169.0

650

BTK 5016-5.3

50

16

52.7

42.9

2×2.65

93.8

315.2

930

Model No.

Nut dimensions

Axial
clearance

Standard
shaft
length
L0

Screw-shaft
inertial
moment
per mm
kg‧cm²/mm

OD
D

Flange
diameter
D1

Overall
length
L

H

B1

PCD

d1

T

Oiling port

h

A

BTK 1006-2.6

26

42

36

8

28

34

4.5

29

-

3

0.05

200
300

7.71×10^-5

BTK 1208-2.6

29

45

44

8

36

37

4.5

32

-

3

0.05

1.60×10^-4

BTK 1404-3.6

31

50

40

10

30

40

4.5

37

5

M6×1

0.10

500
1000

2.96×10^-4

BTK 1405-2.6

32

50

40

10

30

40

4.5

38

5

M6×1

0.10

2.96×10^-4

BTK 1605-2.6

34

54

40

10

30

44

4.5

40

5

M6×1

0.10

5.05×10^-4

BTK 1808-3.6

50

80

61

12

49

65

6.6

60

5

M6×1

0.10

8.09×10^-4

BTK 2005-2.6

40

60

40

10

30

50

4.5

46

5

M6×1

0.10

500
1000
1500

1.23×10^-3

BTK 2010-2.6

52

82

61

12

49

67

6.6

64

5

M6×1

0.10

1.23×10^-3

BTK 2505-2.6

43

67

40

10

30

55

5.5

50

5

M6×1

0.10

3.01×10^-3

BTK 2510-5.3

60

96

98

15

83

78

9.0

72

5

M6×1

0.10

3.01×10^-3

BTK 2806-2.6

50

80

47

12

35

65

6.6

60

6

M6×1

0.10

500
1000
2000
2500

4.74×10^-3

BTK 2806-5.3

50

80

65

12

53

65

6.6

60

6

M6×1

0.10

4.74×10^-3

BTK 3210-2.6

67

103

68

15

53

85

9.0

78

5

M6×1

0.14

8.08×10^-3

BTK 3210-5.3

67

103

98

15

83

85

9.0

78

5

M6×1

0.14

8.08×10^-3

BTK 3610-2.6

70

110

70

17

53

90

11.0

82

7

M6×1

0.17

500
1000
2000
2500
3000

1.29×10^-2

BTK 3610-5.3

70

110

100

17

83

90

11.0

82

7

M6×1

0.17

1.29×10^-2

BTK 4010-5.3

76

116

100

17

83

96

11.0

88

7

M6×1

0.17

1000
1500
2000
3000
3500

1.97×10^-2

BTK 4512-5.3

82

128

118

20

98

104

14.0

94

8

M6×1

0.17

3.16×10^-2

BTK 5016-5.3

102

162

145

25

120

132

18.0

104

12.5

PT1/8

0.20

4.82×10^-2