THK LT BALL SPLINE

Model No.

Spline-nut dimensions

Outer
diameter
D

Outer
diameter D
Tolerance

Length
L₁

Length
L₁
Tolerance

Keyway dimensions

r

Oiling
port
d₁

b
H8

t
+0.05
0

k

LT 6 S
2LT 6 S

14

25

2.5

1.2

10.5

0.5

1

LT 8 S
2LT 8 S

16

25

2.5

1.2

10.5

0.5

1.5

LT 10 S
2LT 10 S

21

33

3

1.5

13

0.5

1.5

LT 13 S
2LT 13 S

24

36

3

1.5

15

0.5

1.5

LT 16 S
2LT 16 S

31

50

3.5

2

17.5

0.5

2

LT 20 S
2LT 20 S

35

63

4

2.5

29

0.5

2

LT 25 S
2LT 25 S

42

71

4

2.5

36

0.5

3

LT 30 S
2LT 30 S

47

80

4

2.5

42

0.5

3

LT 40 S
2LT 40 S

64

100

6

3.5

52

0.5

4

LT 50 S
2LT 50 S

80

125

8

4

58

1

4

Model No.

Spline-shaft dimensions

Basic
torque
rating

Basic
load rating
(radial)

d₀
h7

d

d
Tolerance

l

Length
L(l ₀)

Chamfer
C

C
kN

C₀
kN

C_T
N•m

C_0T
N•m

LT 6 S
2LT 6 S

6

6

100

150(50)
200(100)

0.5

1.18

2.16

0.98

1.96

LT 8 S
2LT 8 S

8

8

100

150(50)
200(100)
250(150)

0.5

1.47

2.55

1.96

2.94

LT 10 S
2LT 10 S

10

10

100

200(100)
300(200)

0.5

2.84

4.90

3.92

7.84

LT 13 S
2LT 13 S

13

13

100

200(100)
300(200)
400(300)

0.5

3.53

5.78

5.88

10.8

LT 16 S
2LT 16 S

16

14.3

100

200(100)
300(200)
400(300)

0.5

7.06

12.6

31.4

34.3

LT 20 S
2LT 20 S

20

17.8

100

300(200)
400(300)
500(400)
600(500)

0.5

10.2

17.8

56.9

55.9

LT 25 S
2LT 25 S

25

22.8

100

300(200)
400(300)
500(400)
600(500)
800(700)

0.5

15.2

25.8

105

103

LT 30 S
2LT 30 S

30

27.8

100

400(300)
500(400)
600(500)
700(600)
1100(1000)

0.5

20.5

34.0

171

148

LT 40 S
2LT 40 S

40

36.3

100

500(400)
700(600)
900(800)
1100(1000)
1600(1500)

1

37.8

60.5

419

377

LT 50 S
2LT 50 S

50

45.3

100
(200)

600(500)
1100(1000)
1300(1200)
1700(1600)
*2200(2000)

1

60.9

94.5

842

769