Model SMA-20 SMA-22 SMA-24 SMA-25 SMA-28 SMA-30 SMA-32 SMA-35 SMA-38 SMA-40 SMA-42 SMA-45 SMA-48 SMA-50 20 22 24 25 28 30 32 35 38 40 42 45 48 50 d [mm] 38 40 42 43 46 48 50 57 60 62 64 67 70 72 D [mm] 42 44 46 47 50 52 54 62 65 67 69 72 75 77 D1 [mm] 30.8 32.8 34.8 35.8 38.8 40.8 42.8 48.4 51.4 53.4 55.4 58.4 61.4 63.4 G [mm] 15.3 15.3 16.3 17.3 17.3 17.3 18.3 19.5 20 20.5 20.5 21 21 21.5 L [mm] 24.1 24.1 25.1 26.1 26.6 26.6 27.6 30 30.5 31 31 31.5 32 32.5 L1 [mm] 29.1 29.1 30.1 31.1 31.6 31.6 32.6 36 36.5 37 37 37.5 38 38.5 L2 [mm] 3 3 3 3 3.5 3.5 3.5 4 4 4 4 4 4.5 4.5 T [mm] 1.8 1.8 1.8 1.8 1.8 1.8 1.8 2 2 2 2 2 2 2 t [mm] 4 4 4 4 4 4 4 4.5 4.5 4.5 4.5 4.5 4.5 4.5 S [mm] 8-M5×18 8-M5×18 8-M5×18 8-M5×18 10-M5×18 10-M5×18 10-M5×18 8-M6×20 10-M6×20 10-M6×20 10-M6×20 10-M6×20 12-M6×20 14-M6×20 M1 4-M5 4-M5 4-M5 4-M5 4-M5 4-M5 4-M5 4-M6 4-M6 4-M6 4-M6 4-M6 4-M6 4-M6 M2 ※ Mounting shaft tolerance is h7 class. ※ Mounting hub tolerance is H7 class How to Place an Order SMA-20 Size ■ Dimensions Model SMA-20 SMA-22 SMA-24 SMA-25 SMA-28 SMA-30 SMA-32 SMA-35 SMA-38 SMA-40 SMA-42 SMA-45 SMA-48 SMA-50 216 255 363 392 441 500 530 883 1020 1079 1157 1285 1402 1705 Rated torque [N・m] 21600 22600 29900 31400 31400 33300 33300 47600 49400 50300 51500 56900 58400 68200 Rated thrust [N] 130 117 111 102 119 114 104 114 132 124 120 112 129 143 Hub contact pressure [N/mm 2 ] 56 57 58 58 66 67 68 80 89 90 91 93 103 111 Hub`s minimum external dia. (S45C) [mm] 8.8 8.8 8.8 8.8 8.8 8.8 8.8 15.7 15.7 15.7 15.7 15.7 15.7 15.7 Tightening torque [N・m] 3.70×10 -6 4.42×10 -6 5.45×10 -5 6.15×10 -5 8.15×10 -5 9.45×10 -5 1.14×10 -4 2.12×10 -4 2.62×10 -4 3.00×10 -4 3.32×10 -4 3.95×10 -4 4.75×10 -4 5.35×10 -4 Moment of inertia [kg・m 2 ] 0.144 0.165 0.180 0.188 0.195 0.208 0.219 0.325 0.362 0.380 0.405 0.435 0.460 0.485 Mass [kg] ※ The operating temperature range is - 40 ℃ to 150℃. ■ Specifications Hub-Shaft Connector SMA MODEL