ROYMECHX

ISO Straight Sided Spline


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



Straight Sided Spline Dimensions


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)