Straight-Sided Splines Machinery's Handbook, 31st Edition
2359
W
D W
D
D
d
d
d
Fig. 7a. 4-Spline Fitting
Fig. 7b. 6-Spline Fitting
Fig. 7c. 10-Spline Fitting
Table 18. SAE Standard 4-Spline Fittings
4A—Permanent Fit
4B—To Slide, No Load
For All Fits
d
h
D
W
d
h
Nom. Diam
T a
T a
Min. Max. Min. Max. Min. Max. Min. Max.
Min. Max. Min. Max.
3 ∕ 4 0.749 0.750 0.179 0.181 0.636 0.637 0.055 0.056 78 0.561 0.562 0.093 0.094 123 7 ∕ 8 0.874 0.875 0.209 0.211 0.743 0.744 0.065 0.066 107 0.655 0.656 0.108 0.109 167 1 0.999 1.000 0.239 0.241 0.849 0.850 0.074 0.075 139 0.749 0.750 0.124 0.125 219 1 1 ∕ 8 1.124 1.125 0.269 0.271 0.955 0.956 0.083 0.084 175 0.843 0.844 0.140 0.141 277 1 1 ∕ 4 1.249 1.250 0.299 0.301 1.061 1.062 0.093 0.094 217 0.936 0.937 0.155 0.156 341 1 3 ∕ 8 1.374 1.375 0.329 0.331 1.168 1.169 0.102 0.103 262 1.030 1.031 0.171 0.172 414 1 1 ∕ 2 1.499 1.500 0.359 0.361 1.274 1.275 0.111 0.112 311 1.124 1.125 0.186 0.187 491 1 5 ∕ 8 1.624 1.625 0.389 0.391 1.380 1.381 0.121 0.122 367 1.218 1.219 0.202 0.203 577 1 3 ∕ 4 1.749 1.750 0.420 0.422 1.486 1.487 0.130 0.131 424 1.311 1.312 0.218 0.219 670 2 1.998 2.000 0.479 0.482 1.698 1.700 0.148 0.150 555 1.498 1.500 0.248 0.250 875 2 1 ∕ 4 2.248 2.250 0.539 0.542 1.910 1.912 0.167 0.169 703 1.685 1.687 0.279 0.281 1106 2 1 ∕ 2 2.498 2.500 0.599 0.602 2.123 2.125 0.185 0.187 865 1.873 1.875 0.310 0.312 1365 3 2.998 3.000 0.720 0.723 2.548 2.550 0.223 0.225 1249 2.248 2.250 0.373 0.375 1969 a See note at end of Table 21. Table 19. SAE Standard 6-Spline Fittings
For All Fits
6A—Permanent Fit
6B—To Slide, No Load 6C—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 0.186 0.188 0.674 0.675 0.874 0.875 0.217 0.219 0.787 0.788 0.999 1.000 0.248 0.250 0.899 0.900
80 0.637 0.638 117 109 0.743 0.744 159 143 0.849 0.850 208
0.599 0.600 0.699 0.700 0.799 0.800 0.899 0.900 0.999 1.000 1.099 1.100 1.199 1.200 1.299 1.300 1.399 1.400
152 207 270 342 421 510 608 713 827
3 ∕ 4 7 ∕ 8
1
1 1 ∕ 8 1.124 1.125 0.279 0.281 1.012 1.013 180 0.955 0.956 263 1 1 ∕ 4 1.249 1.250 0.311 0.313 1.124 1.125 223 1.062 1.063 325 1 3 ∕ 8 1.374 1.375 0.342 0.344 1.237 1.238 269 1.168 1.169 393 1 1 ∕ 2 1.499 1.500 0.373 0.375 1.349 1.350 321 1.274 1.275 468 1 5 ∕ 8 1.624 1.625 0.404 0.406 1.462 1.463 376 1.380 1.381 550 1 3 ∕ 4 1.749 1.750 0.436 0.438 1.574 1.575 436 1.487 1.488 637
2 1.598 1.600 1080 2 1 ∕ 4 2.248 2.250 0.560 0.563 2.023 2.025 721 1.911 1.913 1052 1.798 1.800 1367 2 1 ∕ 2 2.498 2.500 0.622 0.625 2.248 2.250 891 2.123 2.125 1300 1.998 2.000 1688 3 2.998 3.000 0.747 0.750 2.698 2.700 1283 2.548 2.550 1873 2.398 2.400 2430 a See note at end of Table 21. 1.998 2.000 0.497 0.500 1.798 1.800 570 1.698 1.700 833
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