|  | | Size Chart | |
| | This chart gives the RPM of the driven pulley for various diameters of motor pulley turning at a speed of 1725 RPM. Values are approximate and are calculated using 4L belts but apply approximately with 3L and 5L belts |
| O.D. | 1 1/2 | 2 | 2 1/2 | 3 | 3 1/2 | 4 | 4 1/2 | 5 | | 1 1/2 | 1725 | 2415 | 3106 | 3796 | | | | | | 2 | 1232 | 1725 | 2219 | 2711 | | | | | | 2 1/2 | 960 | 1340 | 1725 | 2110 | 2495 | 2874 | 3260 | 3697 | | 3 | 785 | 1097 | 1410 | 1725 | 2041 | 2351 | 2662 | 2980 | | 3 1/2 | 665 | 929 | 1193 | 1459 | 1725 | 1992 | 2258 | 2520 | | 4 | 576 | 805 | 1035 | 1265 | 1496 | 1725 | 1957 | 2184 | | 4 1/2 | 508 | 710 | 913 | 1115 | 1320 | 1521 | 1725 | 1927 | | 5 | 455 | 637 | 818 | 998 | 1181 | 1362 | 1546 | 1725 | | 5 1/2 | 411 | 576 | 740 | 904 | 1066 | 1232 | 1397 | 1558 | | 6 | 375 | 526 | 675 | 825 | 976 | 1124 | 1291 | 1425 | | 6 1/2 | 345 | 483 | 621 | 760 | 897 | 1035 | 1173 | 1311 | | 7 | 319 | 448 | 575 | 703 | 831 | 960 | 1086 | 1213 | | 8 | 278 | 388 | 500 | 611 | 723 | 833 | 945 | 1057 | | 9 | 247 | 345 | 443 | 542 | 640 | 740 | 838 | 936 | | 10 | 220 | 311 | 399 | 488 | 576 | 665 | 754 | 843 | | 12 | 183 | 257 | 331 | 404 | 478 | 552 | 625 | 698 |
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