The RODM Drum Gear Coupling is a torque setting form of the ROD series coupling. By adjusting relevant components, the maximum transmission torque can be easily set within a certain range. Suitable for shafting transmission situations that require safe torque operation to protect important machine components from excessive damage.

| Model | Rated Torque | Maximum Torque | Maximum Speed | Basic Size | Weight | Rotational Inertia | Grease Usage | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nm | Nm | 1/min | D0 | D | D1 | D2 | d1-d2 (2) | L1-L2 | S | A | Kg | J(Kgm²) | Kg | |
| RODM01 | 1900 | 3800 | 8800 | 200 | 110 | 82 | 68 | 14-50 | 43 | 40 | 56 | 15 | 0.048 | 0.03 |
| RODM02 | 3000 | 5940 | 7000 | 240 | 140 | 104 | 85 | 17-62 | 50 | 52 | 62 | 28 | 0.146 | 0.06 |
| RODM03 | 6200 | 12200 | 6000 | 280 | 170 | 127 | 106 | 20-80 | 62 | 65 | 75 | 39 | 0.352 | 0.09 |
| RODM04 | 9300 | 18400 | 4800 | 320 | 210 | 155 | 132 | 26-98 | 76 | 84 | 90 | 65 | 0.66 | 0.12 |
| RODM05 | 15400 | 31000 | 4300 | 365 | 235 | 182 | 150 | 30-112 | 90 | 100 | 105 | 97 | 1.14 | 0.3 |
| RODM06 | 25300 | 49600 | 3700 | 400 | 270 | 210 | 175 | 35-133 | 105 | 110 | 120 | 142 | 2.199 | 0.4 |
| RODM07 | 38600 | 76400 | 3300 | 470 | 310 | 248 | 206 | 70-158 | 120 | 125 | 135 | 189 | 3.02 | 0.6 |
| RODM08 | 48800 | 96500 | 2900 | 500 | 338 | 275 | 235 | 85-174 | 135 | 140 | 158 | 242 | 4.05 | 0.8 |
| RODM09 | 75300 | 147800 | 2700 | 550 | 378 | 306 | 252 | 95-192 | 150 | 160 | 180 | 363 | 9.35 | 1.4 |
| RODM10 | 93000 | 181400 | 2400 | 580 | 400 | 330 | 274 | 105-210 | 175 | 190 | 200 | 445 | 13.56 | 2.5 |
| RODM11 | 166100 | 327200 | 2300 | 635 | 445 | 365 | 305 | 120-232 | 190 | 200 | 214 | 535 | 23.34 | 3.0 |
| RODM12 | 226000 | 447000 | 2000 | 708 | 508 | 425 | 355 | 130-276 | 220 | 230 | 245 | 693 | 114.39 | 4.5 |
Torque protection drum gear coupling is a special coupling device that combines the advantages of drum gear coupling with torque protection function. It is suitable for various mechanical transmission systems that need to transmit large torque and require a certain compensation ability and torque protection between shafts.
The torque protection drum tooth coupling is mainly composed of an inner gear ring, an outer gear shaft sleeve, a torque protection device, an end cover, and a sealing device. Among them, the tooth tip of the external gear shaft sleeve is designed in a drum shape, and the tooth surface is in a circular arc shape. This design helps to improve the contact conditions of the teeth and enhance the ability to transmit torque. The torque protection device is the core component of the coupling, which can automatically disengage or slide when the torque exceeds the set value, thereby protecting the transmission system from damage.
During operation, the torque of the driving shaft is transmitted to the inner gear ring through the outer gear shaft sleeve, which in turn drives the driven shaft to rotate. Due to the presence of drum shaped teeth, the coupling can adapt to displacement compensation at certain angles, radial and axial directions. When the torque exceeds the set value of the torque protection device, the device will automatically start, interrupting torque transmission by disengaging or sliding, thereby protecting other components of the transmission system from damage.
High torque transmission capability: The design of drum shaped teeth increases the contact area of the tooth surface, which can withstand larger torque and is suitable for heavy-duty transmission scenarios.
Good displacement compensation capability: The drum toothed coupling has the ability to compensate for radial, axial, and angular axis deviations, which can reduce additional loads caused by misalignment of the shaft system and improve the reliability and service life of the equipment.
Torque protection function: The torque protection device can automatically start when the torque is overloaded, protecting the transmission system from damage and reducing maintenance costs.
Smooth operation and low noise: The meshing process of the drum shaped teeth is relatively smooth, and the noise generated during operation is low, making it particularly suitable for work environments with strict noise requirements.
Easy installation and maintenance: The structure is relatively simple, and the alignment requirements for the two shafts during installation are not as strict as those for rigid couplings. In terms of maintenance, the sealing device is easy to replace, and the maintenance of internal components is also relatively convenient.
Torque protected crown gear couplings are widely used in industries such as metallurgy, mining, lifting and transportation, petrochemicals, and power. In the metallurgical industry, it is commonly used in the transmission system of large equipment such as rolling mills and blast furnaces; In mining machinery, it is used for power transmission of equipment such as crushers and ball mills; In addition, torque protection drum gear couplings also play an important role in equipment such as pumps and compressors in the petrochemical industry, as well as in equipment such as steam turbine generators and fans in the power industry.
During use, the operation status of the coupling should be regularly checked to promptly identify and address potential issues, in order to extend its service life and ensure the stable operation of the transmission system.
The torque protection drum gear coupling plays an important role in the transmission system due to its unique structure and excellent performance. It can not only transmit large torque, but also has good displacement compensation capability and torque protection function, making it an ideal choice for various heavy-duty transmission occasions.
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