121-□-20g-types-clutches-and-brakes-miki-pulley-vietnam.png

121-□-20G Types (Clutches and brakes) Specifications

121-□-20G Types

[Specifications]

 
Model Size Dynamic friction torque Td [N・m] Static friction torque Ts [N・m] Coil (at 20℃) Heat resistance class Max. rotation speed [min-1 Rotating part moment of inertia J [kg・m2 Total work performed until readjustment of the air gap ET [J] Armature pull-in time ta [s] Torque build-up time tp [s] Torque decaying time td [s] Mass [kg]
Voltage [V] Wattage [W] Current [A] Resistance [Ω]
121-06-20G 06 5 5.5 24 DC 11 0.46 52 B 3000 1.43×10-4 36×106 C: 0.020/B: 0.015 C: 0.041/B: 0.033 C: 0.020/B: 0.015 1.5
121-08-20G 08 10 11 24 DC 15 0.63 38 B 3000 4.23×10-4 60×106 C: 0.023/B: 0.016 C: 0.051/B: 0.042 C: 0.030/B: 0.025 2.7
121-10-20G 10 20 22 24 DC 20 0.83 29 B 3000 1.42×10-3 130×106 C: 0.025/B: 0.018 C: 0.063/B: 0.056 C: 0.050/B: 0.030 5.5
121-12-20G 12 40 45 24 DC 25 1.09 23 B 3000 4.18×10-3 250×106 C: 0.040/B: 0.027 C: 0.115/B: 0.090 C: 0.065/B: 0.050 9.6
121-16-20G 16 80 90 24 DC 35 1.46 16 B 3000 1.34×10-2 470×106 C: 0.050/B: 0.035 C: 0.160/B: 0.127 C: 0.085/B: 0.055 18.5
121-20-20G 20 160 175 24 DC 45 1.88 13 B 2500 4.13×10-2 10×108 C: 0.090/B: 0.065 C: 0.250/B: 0.200 C: 0.130/B: 0.070 35
121-25-20G 25 320 350 24 DC 60 2.50 9.6 B 2000 1.02×10-1 20×108 C: 0.115/B: 0.085 C: 0.335/B: 0.275 C: 0.210/B: 0.125 64

*The dynamic friction torque, Td, is measured at a relative speed of 100 min-1.

[Dimensions]

 

Unit [mm]
Size Dimensions of part Dimensions of shaft
A1 A2 B1 B2 C D E F G H J1 J2 K L M N Z1 Z2 Q1 Q2 S1 S2 U1 U2 V1 V2 X1 X2 W1, 2
6 52.5 75 80 90 55 80 27.5 53 2.6 95 65.5 40.5 105.5 181 47 33 13.5 6.5 25 20 11 38 12.5 39.5 M4×0.7, length: 8 3-M4×0.7, length: 4 3-120° 60° 4
8 65 90 90 105 65 100 27.5 61 2.6 115 78.5 48.5 126.5 217 57 37 13.5 6.5 30 25 14 45 16 47 M4×0.7, length: 8 3-M4×0.7, length: 6 3-120° 60° 5
10 80 110 110 130 80 125 32.5 72 3.2 142.5 98 62 154 270 72 47 15.5 9 40 30 19 55 21 57 M6×1, length: 11 4-M4×0.7, length: 8 4-90° 45° 5
12 105 135 140 160 90 150 35 81 3.2 165 121 73.5 184 330 92 52 20 11.5 50 40 24 64 27 67 M6×1, length: 11 4-M4×0.7, length: 8 4-90° 45° 7
16 135 160 175 185 112 190 43 97 4.5 207 149 90 221 399 113 62 24.5 11.5 60 50 28 75 31 78 M6×1, length: 11 6-M5×0.8, length: 8 6-60° 30° 7
20 155 200 200 230 132 230 45 109 6 247 187 117 276 504 142 74.5 28 14 80 60 38 90 41.5 93.5 M10×1.5, length: 17 4-M6×1, length: 12 4-90° 45° 10
25 195 240 240 270 160 290 47.5 124 20 305 238 154 334 632 183 101.5 28 14 110 70 42 115 45.5 118.5 M10×1.5, length: 17 8-M6×1, length: 12 8-45° 22.5° 12

*The input/output shaft keyways are old JIS standard class 2 while the key is old JIS standard class 1. Note that the keyway dimensions of the unit hub part do not conform to the old JIS standard. Check them on the dimensions table above.

*When inserting pulleys or the like onto input/output shafts, use the supplied insertion set.

*The 121-25-20G base is a casting.