Straight-Sided Splines Table 20. SAE Standard 10-Spline Fittings Machinery's Handbook, 31st Edition
2360
For All Fits
10A—Permanent Fit 10B—To Slide, No Load 10C—To Slide Under Load
d
d
D
W
d
Nom. Diam.
T a
T a
T a
Min. Max. Min. Max. Min. Max.
Min. Max.
Min.
Max.
0.749 0.750 0.115 0.117 0.682 0.683 120 0.644 0.645 0.874 0.875 0.135 0.137 0.795 0.796 165 0.752 0.753 0.999 1.000 0.154 0.156 0.909 0.910 215 0.859 0.860 1.124 1.125 0.174 0.176 1.023 1.024 271 0.967 0.968 1.249 1.250 0.193 0.195 1.137 1.138 336 1.074 1.075 1.374 1.375 0.213 0.215 1.250 1.251 406 1.182 1.183 1.499 1.500 0.232 0.234 1.364 1.365 483 1.289 1.290 1.624 1.625 0.252 0.254 1.478 1.479 566 1.397 1.398 1.749 1.750 0.271 0.273 1.592 1.593 658 1.504 1.505
183 248 326 412 508 614 732 860 997
0.607 0.608 0.708 0.709 0.809 0.810 0.910 0.911 1.012 1.013 1.113 1.114 1.214 1.215 1.315 1.316 1.417 1.418
241 329 430 545
3 ∕ 4 7 ∕ 8
1
1 1 ∕ 8 1 1 ∕ 4 1 3 ∕ 8 1 1 ∕ 2 1 5 ∕ 8 1 3 ∕ 4
672 813 967 1135 1316
2 1.998 2.000 0.309 0.312 1.818 1.820 860 1.718 1.720 1302 1.618 1.620 1720 2 1 ∕ 4 2.248 2.250 0.348 0.351 2.046 2.048 1088 1.933 1.935 1647 1.821 1.823 2176 2 1 ∕ 2 2.498 2.500 0.387 0.390 2.273 2.275 1343 2.148 2.150 2034 2.023 2.025 2688 3 2.998 3.000 0.465 0.468 2.728 2.730 1934 2.578 2.580 2929 2.428 2.430 3869 3 1 ∕ 2 3.497 3.500 0.543 0.546 3.182 3.185 2632 3.007 3.010 3987 2.832 2.835 5266 4 3.997 4.000 0.621 0.624 3.637 3.640 3438 3.437 3.440 5208 3.237 3.240 6878 4 1 ∕ 2 4.497 4.500 0.699 0.702 4.092 4.095 4351 3.867 3.870 6591 3.642 3.645 8705 5 4.997 5.000 0.777 0.780 4.547 4.550 5371 4.297 4.300 8137 4.047 4.050 10746 5 1 ∕ 2 5.497 5.500 0.855 0.858 5.002 5.005 6500 4.727 4.730 9846 4.452 4.455 13003 6 5.997 6.000 0.933 0.936 5.457 5.460 7735 5.157 5.160 11718 4.857 4.860 15475 a See note at end of Table 21. Table 21. SAE Standard 16-Spline Fittings
For All Fits
16A—Permanent Fit 16B—To Slide, No Load 16C—To Slide Under Load
d
d
D
W
d
Nom. Diam.
T a
T a
T a
Min. Max. Min. Max. Min. Max.
Min. Max.
Min.
Max.
2 1.997 2.000 0.193 0.196 1.817 1.820 1375 1.717 1.720 2083 1.617 1.620 2751 2 1 ∕ 2 2.497 2.500 0.242 0.245 2.273 2.275 2149 2.147 2.150 3255 2.022 2.025 4299 3 2.997 3.000 0.291 0.294 2.727 2.730 3094 2.577 2.580 4687 2.427 2.430 6190 3 1 ∕ 2 3.497 3.500 0.340 0.343 3.182 3.185 4212 3.007 3.010 6378 2.832 2.835 8426 4 3.997 4.000 0.389 0.392 3.637 3.640 5501 3.437 3.440 8333 3.237 3.240 11005 4 1 ∕ 2 4.497 4.500 0.438 0.441 4.092 4.095 6962 3.867 3.870 10546 3.642 3.645 13928 5 4.997 5.000 0.487 0.490 4.547 4.550 8595 4.297 4.300 13020 4.047 4.050 17195 5 1 ∕ 2 5.497 5.500 0.536 0.539 5.002 5.005 10395 4.727 4.730 15754 4.452 4.455 20806 6 5.997 6.000 0.585 0.588 5.457 5.460 12377 5.157 5.160 18749 4.857 4.860 24760 a Torque Capacity of Spline Fittings: The torque capacities of the different spline fittings are given in the columns headed “ T .” The torque capacity, per inch of bearing length at 1000 pounds pressure per square inch on the sides of the spline, may be determined by the following formula, in which T = torque capacity in inch-pounds per inch of length, N = number of splines, R = mean radius or radial distance from center of hole to center of spline, h = depth of spline: T = 1000 NRh Table 22. Formulas for Determining Dimensions of SAE Standard Splines
A Permanent Fit
B To Slide Without Load
C To Slide Under Load
No. of Splines
W For All Fits 0.241 D a 0.250 D 0.156 D 0.098 D
h
d
h
d
h
d
0.075 D 0.050 D 0.045 D 0.045 D
0.850 D 0.900 D 0.910 D 0.910 D
0.125 D 0.075 D 0.070 D 0.070 D
0.750 D 0.850 D 0.860 D 0.860 D
… …
Four Six Ten
0.100 D 0.095 D 0.095 D
0.800 D 0.810 D 0.810 D
Sixteen
a Four splines for fits A and B only. The formulas in the table above give the maximum dimensions for W , h , and d , as listed in Table 18 through Table 21 inclusive.
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