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Straight Sided Spline Dimensions
Straight Sided Spline Dimensions
Introduction
The tables below show the dimensions of a straight sided spline in accordance with BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements
The profile of a straight sided spline is defined by
N = Number of splines
d = Minor Diameter
D = Outside Diameter
d
Light Series
Medium Series
Designation.....
N
D
B
Designation.....
N
D
B
mm
mm
mm
mm
mm
mm
mm
11
6 x 11 x 14
6
14
3
13
6 x 13 x 16
6
16
3,5
16
6 x 16 x 20
6
20
4
18
6 x 18 x 22
6
22
5
21
6 x 21 x 25
6
25
5
23
6 x 23 x 26
6
26
6
6 x 23 x 28
6
28
6
26
6 x 26 x 30
6
30
6
6 x 26 x 32
6
32
6
28
6 x 28 x 32
6
32
7
6 x 28 x 34
6
34
7
32
8 x 32 x 36
8
36
6
8 x 32 x 38
8
38
6
36
8 x 36 x 40
8
40
7
8 x 36 x 42
8
42
7
42
8 x 42 x 46
8
46
8
8 x 42 x 48
8
48
8
46
8 x 46 x 50
8
50
9
8 x 46 x 54
8
54
9
52
8 x 52 x 58
8
58
10
8 x 52 x 60
8
60
10
56
8 x 56 x 62
8
62
10
8 x 56 x 66
8
65
10
62
8 x 62 x 68
8
68
12
8 x 62 x 72
8
72
12
72
10 x 72 x 78
10
78
12
10 x 72 x 82
10
82
12
82
10 x 82 x 88
10
88
12
10 x 82 x 92
10
92
12
92
10 x 92 x 98
10
98
14
10 x 92 x 102
10
102
14
102
10 x 102 x 108
10
108
16
10 x 102 x 112
10
112
16
112
10 x 112 x 120
10
120
18
10 x 112 x 125
10
125
18
Tolerances of Straight sided Splines
Tolerances on Hole
Tolerances on Shaft
Type of Fit
Not Treated After Broaching
Treated After Broaching
B
D
d
B
D
d
B
D
d
H9
H10
H7
H11
H10
H7
d10
a11
f7
Sliding
f9
a11
g7
Close fit
h10
a11
h7
Fixed
Tolerances Symmetry
spline width B
3
3,5 4 5 6
7 8 9 10
12 14 16 18
Tolerance of Symmetry (t)
0,010 (IT7)
0,012 (IT7)
0,015 (IT7)
0,018 (IT7)