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Small AC Gear Reducer Motor 40W
The 5RK series AC gear motor features a robust 90mm frame and delivers powerful performance with 40W–60W output. Designed for higher load applications, it provides strong torque, stable speed control, and reliable operation. Available in both single-phase and three-phase configurations, it is ideal for industrial automation, conveyors, and heavy-duty transmission systems.
- Output Power: 40W / 60W
- Voltage: 110V / 220V (Single-phase & Three-phase options)
- Rated Speed: 1300 – 1550 r/min
- Rated Torque: 246 – 670 mN·m
List of motor characteristics
5RK AC deceleration motor (40/60W) (90mm)
| Motor Model | Specs | Output Power W | Voltage V | Frequency Hz | Current A | Starting Torque | Rated Torque | Rated Revolution r/min | Capacity/Ve μF/VAC | ||
| JWD Types | mN.m | gf.cm | mN.m | gf.cm | |||||||
| 5RK40GN-C | Reversible 30min | 40 | 1-phase 220V | 50 | 0.38 | 367 | 3670 | 294 | 2940 | 1300 | 3.0/450 |
| 5RK40A-C | 60 | 0.4 | 307 | 3070 | 246 | 2460 | 1550 | 3.0/450 | |||
| 5RK25GN-A | Reversible 30min | 40 | 1-phase 110V | 50 | 0.76 | 367 | 3670 | 294 | 2940 | 1300 | 12/250 |
| 5RK25A-A | 60 | 0.8 | 307 | 3070 | 246 | 2460 | 1550 | 12/250 | |||
| 5RK25GN-S | —— | 40 | 3-phase 220V | 50 | 0.42 | 367 | 3670 | 294 | 2940 | 1300 | —— |
| 5RK25A-S | 60 | 0.38 | 307 | 3070 | 246 | 2460 | 1550 | —— | |||
| 5RK30GN-C | Reversible 30min | 60 | 1-phase 220V | 50 | 0.5 | 837 | 8370 | 670 | 6700 | 1350 | 4/450 |
| 5RK30A-C | 60 | 0.52 | 692 | 6920 | 554 | 5540 | 1550 | 4/450 | |||
| 5RK30GN-A | Reversible 30min | 60 | 1-phase 110V | 50 | 1.00 | 837 | 8370 | 670 | 6700 | 1350 | 16/250 |
| 5RK30A-A | 60 | 1.2 | 692 | 6920 | 554 | 5540 | 1550 | 16/250 | |||
| 5RK30GN-A | —— | 60 | 3-phase 220V | 50 | 0.52 | 551 | 5510 | 441 | 4410 | 1350 | —— |
| 5RK30A-A | 60 | 0.48 | 462 | 4620 | 370 | 3700 | 1550 | —— | |||
- Parameters in above table refer to motor alone,without any load device.
- Permissible change in rated speed and rated current of the motor is within the range of±5%.
Outline dimension drawing

Allowable load for the gear motor
| Geared-down parameter | Synchronous speed | 500 | 300 | 200 | 150 | 120 | 100 | 75 | 60 | 50 | 40 | 35 | 30 | 25 | 20 | 15 | 12 | 10 | 8 | 7 | 6 | 5 | 3 | |
| Ratio | 3 | 5 | 7.5 | 10 | 12.5 | 15 | 20 | 25 | 30 | 36 | 40 | 50 | 60 | 75 | 100 | 120 | 150 | 180 | 200 | 250 | 300 | 500 | ||
| Max allowable load | 40W | Kg.cm/N.m | 7.3 0.72 | 12 1.18 | 18 1.77 | 24.2 2.4 | 30 2.94 | 36 3.53 | 43.6 4.28 | 55 5.0 | 65.5 6.24 | 78 7.7 | 87 8.57 | 98 9.64 | 100 9.81 | |||||||||
| 60W | kg.cm/N.m | 11 1.08 | 18 1.77 | 27 2.64 | 36 3.57 | 41 4.02 | 50 4.80 | 65 6.24 | 81 8.03 | 98 9.64 | 117 11.5 | 130 12.8 | 147 14.4 | 200 19.6 | ||||||||||
- The speed is based on the synchronous motor speed reduction ratio as a benchmark calculated by dividing the value of.Actual speed will vary the size of the load changes in less than the values shown in2~15%.
- Hope to the table of the reduction ratio is greater than the further reduction,it would be installed between the motor and the reducer reduction ratiio of 10 the middle of the reducer.
- When the load torque exceeds the maximum allowable load torque gear motor,and a locked rotor situation exists,please slow down box at the junction of the output shaft and load torque limit device installed to ensure the normal operation gearbox.





