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Ruadigon Couplings in Agriculture: Components for Combine Harvesters, Seeders, Bucket Elevators, and Storage Plants
Ruadigon couplings are key in power transmission for agricultural equipment. In this guide, we explain how to identify them, what data you need to request a quote, and common mistakes when ordering them.
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Technical team at MR Accesorios Industriales · Updated on November 8, 2026

What are Ruadigon couplings and what are they used for?
Ruadigon couplings are power transmission components that connect two shafts to transmit motion and torque, absorbing misalignments and vibrations. In agriculture, they are used in equipment such as combine harvesters, seeders, bucket elevators, and storage plants, where working conditions demand resistant parts. Their design allows compensating for small assembly misalignments and protects bearings and other components from excessive loads. When choosing a Ruadigon coupling, it is essential to consider shaft diameters, power to be transmitted, and available space.
Within the Ruadigon line, elastic band couplings are very common in agricultural machinery due to their ability to absorb impacts and vibrations. These couplings consist of two metal masses joined by a rubber band that acts as a flexible element. The elastic band allows some freedom of angular and axial movement, which reduces wear on bearings and improves the service life of the assembly. In Argentina, these couplings are found in auger drives, grain elevators, and other equipment requiring flexible, low-maintenance coupling.
To identify a Ruadigon coupling, the first step is to inspect the part for an engraved code or label. If it is not legible, measurements such as outer diameter, bore diameter, and overall width can be taken. With that data, MR's technical team can help you identify the correct model. It is important not to confuse elastic band couplings with other types of rigid or chain couplings, as each has specific applications. A common mistake is ordering a coupling based only on shaft diameter, without considering power and torque, which can lead to an inadequate selection.
Ruadigon couplings in combine harvesters
Combine harvesters are complex machines with multiple drives that require reliable couplings to avoid unscheduled downtime. Ruadigon elastic band couplings are used in systems such as the reel, feed auger, and grain elevators. Their ability to absorb vibrations is key to protecting bearings and other components from the dynamic loads typical of harvesting. When quoting a coupling for a combine harvester, it is helpful to indicate the machine's make and model, as well as the coupling code if visible.
Within the line, there are elastic band couplings such as X-2, X-4, and X-5. The choice depends on shaft diameters and motor power. At MR, we sell genuine Ruadigon couplings and can advise you on the most suitable one for your equipment. Remember that an oversized coupling can be as harmful as an undersized one, as it will not properly protect the system.
When installing an elastic band coupling on a combine harvester, it is important to verify shaft alignment and band tension. A band that is too tight can generate excessive radial loads on bearings, while a loose band can slip and wear prematurely. The condition of the band should also be checked periodically, as rubber degrades with time and use. If you need to replace a Ruadigon coupling, send a photo of the part and the main measurements to our WhatsApp or email, and we will quote the exact replacement.
Ruadigon couplings in seeders
Seeders require precise and smooth transmissions to ensure uniform seed distribution. Ruadigon elastic band couplings are used in seeding trains, metering units, and disc drive systems. Their flexibility helps absorb impacts that occur when working on uneven terrain, thus protecting bearings and gears. When quoting a coupling for a seeder, it is advisable to indicate the machine's make and model, and if possible, the original coupling code.
In trailing or self-propelled seeders, Ruadigon couplings may be subject to variable loads depending on forward speed and soil conditions. Therefore, it is important to choose a coupling with adequate torque capacity. Elastic band models such as X-2 or X-4 are part of the line, and the choice depends on size and power. At MR, we distribute Ruadigon couplings for seeders and can help you identify the correct model from shaft measurements and center distance.
A common mistake when ordering a coupling for a seeder is confusing the bore diameter with the outer diameter of the coupling. It is always better to measure the shaft with a caliper and check if it has a keyway. Attention should also be paid to the type of elastic band, as there are different hardnesses and materials. If you are unsure, send us a photo of the old coupling and measurements, and we will indicate the corresponding Ruadigon replacement. This way you avoid delays and ensure compatibility with your seeder.
Ruadigon couplings in bucket elevators and grain elevators
Bucket elevators and grain elevators are critical equipment in storage plants and silos, where a failure can halt the entire operation. Ruadigon elastic band couplings are used to connect the gearmotor to the elevator shaft, absorbing vibrations and misalignments typical of these structures. Their design allows quick assembly and disassembly, facilitating maintenance. When quoting a coupling for a bucket elevator, it is key to know the motor power and shaft diameters.
In tall bucket elevators, couplings must withstand high starting loads and torque variations. Ruadigon models with elastic band X-2, X-4, and X-5 are chosen according to torque and shaft diameters. At MR, we sell Ruadigon couplings for bucket elevators and grain elevators, and we can advise you on the correct selection for your application.
When installing a coupling on a bucket elevator, it is essential to properly align the motor and reducer shafts. Excessive misalignment can cause premature band wear and vibrations throughout the structure. It is also necessary to verify that the fastening screws are properly tightened and that the band has no cuts or deformations. If you need to replace a Ruadigon coupling on your bucket elevator, send the shaft measurements and center distance, and we will quote the exact model.
Ruadigon couplings in storage plants
Storage plants handle large volumes of grain and require transport and processing equipment that operates continuously. Ruadigon couplings are used in screw conveyors, belt conveyors, screens, and other equipment. Their ability to absorb vibrations and misalignments is essential to reduce wear on bearings and supports. When quoting a coupling for a storage plant, it is important to indicate the specific equipment and operating conditions.
In these environments, Ruadigon elastic band couplings offer a practical solution compared to other types of couplings. Models X-2, X-4, and X-5 are chosen according to power and shaft diameter. At MR, we distribute Ruadigon couplings for storage plants and can help you select the correct model based on torque and speed of your equipment.
A frequent mistake in storage plants is not considering the service factor when choosing a coupling. This factor depends on the type of load (uniform, with impacts, etc.) and daily operating hours. If underestimated, the coupling may fail prematurely. Therefore, when quoting a Ruadigon coupling, it is advisable to describe the application and duty cycle. With that information, at MR we recommend the appropriate coupling and quote the original replacement.
How to identify and measure a Ruadigon coupling
To order a Ruadigon coupling correctly, it is ideal to have the part code. Elastic band couplings usually have the model engraved, for example X-2, X-4, or X-5, sometimes followed by letters indicating the band type. If the code is not visible, key measurements can be taken: outer diameter of the masses, bore diameter, overall width, and center distance between holes. With that data, the MR team can identify the equivalent model.
In addition to measurements, it is useful to know the make and model of the equipment where the coupling is mounted. The machine manual may indicate the exact coupling code. The shaft diameter can also be measured and checked for a keyway, as that defines the type of bore. At MR, we sell genuine Ruadigon couplings and can advise you on identification.
When measuring an elastic band coupling, pay attention to the condition of the band. If it is worn or crystallized, it may also need to be replaced. In that case, it is advisable to order the complete coupling or the band separately, according to the code. A common mistake is measuring only the outer diameter and forgetting the bore diameter, which leads to ordering a coupling that does not fit the shaft. Therefore, we always recommend sending a photo with a ruler or caliper next to it for reference.
Common mistakes when ordering Ruadigon couplings and how to avoid them
One of the most frequent mistakes is ordering a coupling based only on shaft diameter, without considering the power to be transmitted. An undersized coupling can break or wear the band quickly, while an oversized one may not adequately protect the system. Therefore, when quoting a Ruadigon coupling, it is important to indicate the application and motor power. At MR, we help you select the correct model.
Another common mistake is confusing elastic band couplings with other types of couplings, such as jaw or rigid couplings. Each type has different characteristics and they are not interchangeable without modifying the assembly. The type of elastic band should also be verified, as there are different hardnesses and materials depending on the application. If you have doubts, send a photo of the old coupling and measurements, and we will indicate the corresponding Ruadigon replacement.
Finally, it is important not to neglect alignment when installing a new coupling. Excessive misalignment can cause vibrations, premature band wear, and bearing damage. Before mounting the coupling, verify that the shafts are aligned and that the masses are properly fastened. If you need advice, at MR we are in Buenos Aires, Argentina, and we can guide you in the selection and installation of Ruadigon couplings for your agricultural equipment.
Frequently asked questions
How do I know which Ruadigon coupling my combine harvester needs?
Ideally, look for the code engraved on the coupling, for example X-2, X-4, or X-5. If it is not legible, measure the outer diameter, bore diameter, and overall width, and send a photo to MR. With that data, we will identify the correct model.
What should I do if the elastic band of my Ruadigon coupling is worn?
If the band is worn, it is advisable to order the band or the complete coupling according to the code. At MR, we quote what you need with the code, measurements, or a photo.
What measurements do I need to quote a Ruadigon coupling?
You need the bore diameter of each mass, the outer diameter, the overall width, and the center distance between holes. It is also useful to know the motor power and application. With that data, at MR we quote the exact coupling.
Are Ruadigon couplings suitable for grain bucket elevators?
Yes, Ruadigon elastic band couplings are widely used in bucket elevators and grain elevators due to their ability to absorb vibrations and misalignments. The choice of model (X-2, X-4, X-5) depends on power and shafts.
Is MR an official Ruadigon distributor?
Yes, MR is an official Ruadigon distributor in Argentina. We sell genuine Ruadigon couplings and can advise you on selecting the correct model for your agricultural application.
Products with photos in the catalogue
Keep reading
- Ruadigon in Argentina: complete guide to elastic couplings
Ruadigon is a brand of elastic couplings sold in Argentina. In this guide we review its product lines, typical applications, and how to get a quote by code.
- Ruadigon Codes: How to Read Coupling Designations
Practical guide to interpreting Ruadigon codes on elastic couplings. Understand the structure, prefixes, suffixes and real examples to order the correct replacement part.
- Ruadigon Couplings: Where They Are Used, How to Select Them, Installation and Maintenance to Make Them Last
Ruadigon elastic couplings are a reliable solution for transmitting power between shafts, absorbing misalignments and vibrations. In this guide we explain how to choose them according to the application, install them correctly and maintain them to extend their service life.
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