Specification ( MZ-CK ) Dimensions-mm Model Max. Torque (kgf-m) Nominal Overrun-ning Drag (kgf-m) Max. Overrunning (rpm) Clutch Side Stock Bore Size Coupling Side Stock Bore Size A B C D E F G H I S Weight (kgf) Inner Race Outer Race Dia (H7) Key way Min. Max. MZ 20CK 33 0.03 1,600 700 20 6×2.8 15 40 174 111 80 60 45 7.35 85 52.3 67 9.7 6.1 MZ 30CK 75 0.04 1,500 500 30 10×3.3 15 45 194 122 100 70 45 7.35 85 57.3 82 9.7 9.4 MZ 45CK 165 0.07 1,400 300 45 14×3.8 20 56 226 142 125 85 56 8.7 106 66.5 92 11.5 15.8 MZ 60CK 215 0.10 1,200 250 60 18×4.4 20 75 236 167 155 110 56 8.7 106 66.5 102 11.5 24.5 MZ 70CK 310 0.13 1,100 250 70 20×4.9 25 80 260 186 175 115 63 5.6 130 76.8 105 15.2 32.6   Specification ( MG-CK ) Dimensions-mm Model Max. Torque (kgf-m) Nominal Overrun-ning Drag (kgf-m) Max. Overrunning (rpm) Clutch Side Stock Bore Size Coupling Side Stock Bore Size A B C (h7) D E F G S I Weight (kgf) Inner Race Outer Race Dia (H7) Key way Min. Max. MG 300CK 32 0.023 2,800 900 19 5×2 20 56 155 142 77 85 56 8.7 106 11.5 63 8.5 MG 400CK 55 0.029 2,600 800 22 5×2 20 75 160 167 88 110 56 8.7 106 11.5 70 13.5 MG 500CK 165 0.052 2,400 800 31.5 7×3 30 100 195 220 108 140 71 13.55 130 15.2 89 28 MG 600CK 320 0.086 2,100 700 50 12×3.5 45 125 250 307 136 170 90 24.8 181 22.7 95 52 MG 700CK 600 0.173 1,500 500 70 18×6 55 150 275 357 180 210 100 24.8 181 22.7 127 80 MG 750CK 970 0.35 1,400 500 85 24×6 60 160 340 406 200 224 112 2.1 250 30.1 153 147 MG 800CK 1,800 0.55 1,300 475 110 28×7 75 200 370 472 250 280 140 30 250 30.1 158 182 MG 900CK 2,500 0.69 1,200 400 135 35×9 98 260 496 578 300 374 241 121.7 280 37.5 165 420 MG 1000CK 3,450 0.83 1,200 325 160 38×10 108 285 510 - 370 408 241 - - 37.5 188 470   Character ( MZ-CK, MG-CK ) 1. MZ-CK Series & MG-CK Series are clutch coupling utilizing MZ-K, MG-K Series clutches. 2. Specify right hand (R.H) or left hand (L.H) inner race drive viewed from direction of arrow mark    when ordering (Refer the above drawing) 3. Accurately align both sprockets