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

BLK 1510-5.6

15

10

15.75

12.5

2×2.8

14.3

27.8

340

BLK 1616-2.8

16

16

16.65

13.7

1×2.8

5.2

9.9

180

BLK 1616-3.6

16.65

13.7

2×1.8

7.1

14.3

220

BLK 2020-2.8

20

20

20.75

17.5

1×2.8

8.1

17.2

230

BLK 2020-3.6

20.75

17.5

2×1.8

11.1

24.7

290

BLK 2525-2.8

25

25

26.0

22.0

1×2.8

12.2

26.9

270

BLK 2525-3.6

26.0

22.0

2×1.8

16.6

38.7

350

BLK 3232-2.8

32

32

33.25

28.3

1×2.8

17.3

41.4

340

BLK 3232-3.6

33.25

28.3

2×1.8

23.7

59.5

440

BLK 3620-5.6

36

20

37.75

31.2

2×2.8

54.9

134.3

760

BLK 3624-5.6

24

38.0

30.7

2×2.8

63.8

151.9

770

BLK 3636-2.8

36

37.4

31.7

1×2.8

22.4

54.1

390

BLK 3636-3.6

37.4

31.7

2×1.8

30.8

78.0

490

BLK 4040-2.8

40

40

41.75

35.2

1×2.8

28.2

68.9

430

BLK 4040-3.6

41.75

35.2

2×1.8

38.7

99.2

550

BLK 5050-2.8

50

50

52.2

44.1

1×2.8

42.2

107.8

530

BLK 5050-3.6

52.2

44.1

2×1.8

57.8

155.0

670

Model No.

Nut dimensions

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

OD

Flange
diameter
D1

Overall
length
L

H

B1

PCD

d1

T

h

Oiling port
A

BLK 1510-5.6

34

57

44

10

24

45

5.5

40

5

M6×1

3.90×10^-4

BLK 1616-2.8

32

53

54

10

37.5

42

4.5

38

5

M6×1

5.05×10^-4

BLK 1616-3.6

32

53

38

10

21.5

42

4.5

38

5

M6×1

5.05×10^-4

BLK 2020-2.8

39

62

65

10

47.5

50

5.5

46

5

M6×1

1.23×10^-3

BLK 2020-3.6

39

62

45

10

27.5

50

5.5

46

5

M6×1

1.23×10^-3

BLK 2525-2.8

47

74

80

12

60

60

6.6

56

6

M6×1

3.01×10^-3

BLK 2525-3.6

47

74

55

12

35

60

6.6

56

6

M6×1

3.01×10^-3

BLK 3232-2.8

58

92

102

15

77

74

9

68

7.5

M6×1

8.08×10^-3

BLK 3232-3.6

58

92

70

15

45

74

9

68

7.5

M6×1

8.08×10^-3

BLK 3620-5.6

70

110

78

17

45

90

11

80

8.5

M6×1

1.29×10^-2

BLK 3624-5.6

75

115

94

18

59

94

11

86

9

M6×1

1.29×10^-2

BLK 3636-2.8

66

106

113

17

86

85

11

76

8.5

M6×1

1.29×10^-2

BLK 3636-3.6

66

106

77

17

50

85

11

76

8.5

M6×1

1.29×10^-2

BLK 4040-2.8

73

114

125

17

96.5

93

11

84

8.5

M6×1

1.97×10^-2

BLK 4040-3.6

73

114

85

17

56.5

93

11

84

8.5

M6×1

1.97×10^-2

BLK 5050-2.8

90

135

156

20

122

112

14

104

10

M6×1

4.82×10^-2

BLK 5050-3.6

90

135

106

20

72

112

14

104

10

M6×1

4.82×10^-2