RINGSPANN guide
What RINGSPANN manufactures and what it stands out for
RINGSPANN is a manufacturer specialized in power transmission components for demanding industrial applications. Its catalog focuses on elements that transmit torque, fix components onto shafts and protect machinery against overloads.
Among its most outstanding products are shaft-hub connections (shrink discs, conical bushes), which allow mounting pulleys, gears or flywheels onto shafts without a keyway, by radial tightening. It also manufactures couplings of different types: metal bellows, pin and bush, conical and rigid, to connect shafts with or without misalignment.
Another important line is freewheels, which allow rotation in one direction and lock movement in the opposite, ideal for backstops or intermittent feeds. It also produces torque limiters that protect the transmission against overloads, precision clamping systems to fix and center components, and industrial brakes with discs and calipers.
RINGSPANN stands out for the precision and robustness of its designs, intended for severe industrial environments. Its products are used in machine tools, process equipment, conveyors, pumps and a wide variety of machinery worldwide.
RINGSPANN lines sold by MR
MR Accesorios Industriales, as exclusive representative of RINGSPANN in Argentina, sells the brand in the Power transmission category. Below are the subcategories:
Shaft-hub connections
Conical fastening elements that transmit torque without a key. They include shrink discs and conical bushes.
Couplings
Couplings to connect shafts: metal bellows, pin and bush, conical and rigid.
Freewheels
Unidirectional mechanisms to prevent reverse rotation or allow free rotation in one direction.
Precision clamping systems
Components to fix and center parts with high precision, such as thrust rings and clamping elements.
Torque limiters
Safety devices that interrupt transmission in the event of overloads.
Remote control systems
Accessories to remotely operate clutches, brakes and other mechanisms.
Cardan shafts
Articulated shafts to transmit motion between misaligned shafts.
Industrial brakes
Discs and braking components to stop or control shaft speed.
Main RINGSPANN series
RINGSPANN organizes its products into series identified by numeric or alphanumeric codes. Below are the most representative series sold by MR in Argentina:
Series 42xx – Shaft-hub connections
Shrink discs and conical connections for keyless mounting. They transmit torque by friction and allow quick disassembly. Examples: 4200-014301-000000, 4200-014301-C00000.
Series 30xx – Precision clamping systems
Precision clamping elements to fix and center components. Examples: 3021-011001, 3021-011002.
Series 44xx – Torque limiters
Torque limiters that protect the transmission against overloads. Examples: 4476-003001, 4476-003002.
Series SWK – Couplings
Precision safety couplings, which limit torque in the event of an overload. Examples: SWK / size 10, SWK / size 30.
Series WK – Couplings
Miniature metal bellows couplings from the WK line. Examples: WK1 / size 5, WK2 / size 1.
Series 10xx – Precision clamping systems
Precision clamping systems from the 10xx series. Examples: 1001-011001, 1001-015001.
Series 11xx – Precision clamping systems
Thrust rings and clamping elements from the 11xx series. Examples: 1116-011001, 1116-015001.
Series WKE – Couplings
Elastic couplings with elastomer, backlash-free, from the WKE series. Examples: WKE / size 5, WKE / size 24.
Series 10xx – Shaft-hub connections
Fastening elements from the 10xx series, such as star spring washers. Examples: 1051-012001, 1051-015001.
How to read a RINGSPANN code
RINGSPANN codes follow a logical structure that combines letters and numbers to identify the line, size and variant. Understanding this nomenclature is key to selecting the correct replacement. Below, we explain the most common patterns with real examples from the catalog.
Long numeric codes (e.g. 4200-014301-000000)
In shaft-hub connections and shrink discs, the code is divided into three blocks separated by hyphens. The first block (e.g. 4200) identifies the series. The second block (e.g. 014301) indicates the size and configuration: the first digits usually refer to the nominal diameter. The third block (e.g. 000000) corresponds to execution variants. For example, 4200-014301-000000 and 4200-014301-C00000 share series and size, but differ in the final suffix.
Codes with letters and numbers (e.g. FGR 12 R)
In freewheels, the code combines letters that identify the line (FGR), a number that indicates the size (12) and a letter that indicates the construction variant (R). Additional suffixes such as A1A2 may be added for specific configurations. For example, FGR 12 R and FGR 15 R share the same logic.
Codes with explicit size (e.g. SWK / size 10)
In precision couplings, the code includes the series (SWK, WK, WKE) and the numeric size. For example, SWK / size 10 and SWK / size 30 indicate different sizes within the same series.
Brake disc codes (e.g. Brake disc / diameter 125 mm)
In industrial brakes, the code consists of the description and the diameter in millimeters. For example, Brake disc / diameter 125 mm and Brake disc / diameter 150 mm are direct references to the size.
Frequent RINGSPANN prefixes and suffixes
RINGSPANN codes usually include prefixes and suffixes that provide information about the series, product type or variant. Knowing them helps interpret the designations and avoid errors when ordering spare parts.
Series prefixes
Alphanumeric prefixes identify the product line. For example: 42xx for shaft-hub connections, 30xx for precision clamping systems, 44xx for torque limiters, SWK for safety couplings, WK for metal bellows couplings and WKE for elastic couplings, FGR for freewheels, and CSF for cardan shafts.
Numeric suffixes
In long codes, the last digits usually indicate execution variants. For example, in 4200-014301-000000 the suffix 000000 can change to C00000 for a different configuration. In series such as 1001, suffixes 001, 002, etc. differentiate versions of the same size.
Letter suffixes
In freewheels, the letter R after the number indicates a construction variant. In couplings, suffixes such as DCO (in REB DCO) or EEO (in RWK EEO) identify the mounting type or design. In torque limiters, there are no standardized letters; the complete numeric code is the reference.
Applications by industry in Argentina
RINGSPANN products are used in a wide variety of industries in Argentina. Below, we detail the most common applications in each sector:
Metallurgy
In the metallurgical industry, RINGSPANN shaft-hub connections and couplings are used in machine tools, presses, rolling mills and cutting equipment. Freewheels prevent reverse rotation in feed systems, and torque limiters protect against overloads in production lines.
Agriculture
In agriculture, RINGSPANN couplings and cardan shafts are used in agricultural machinery, such as harvesters, seeders and transport equipment. Shaft-hub connections facilitate the mounting of pulleys and gears on transmission shafts.
Naval
In the naval industry, RINGSPANN components are applied in winches, cranes and deck equipment. Freewheels and torque limiters provide safety in lifting and mooring operations.
Oil and gas
In the oil sector, RINGSPANN products are used in pumps, compressors and process equipment. Shaft-hub connections and couplings withstand severe load and vibration conditions.
Food
In the food industry, RINGSPANN couplings and connections are used in conveyors, mixers, packaging machines and process equipment. Precision is key in this sector.
Mining
In mining, RINGSPANN components are used in mills, crushers, conveyor belts and extraction equipment. Torque limiters and freewheels protect machinery against overloads and reverse rotation.
Paper
In the paper industry, RINGSPANN couplings and shaft-hub connections are applied in paper machines, calenders, winders and transmission systems. Precision and wear resistance are fundamental.
Cement
In cement plants, RINGSPANN products are used in conveyors, bucket elevators, fans and mills. Shaft-hub connections and torque limiters withstand heavy loads and dusty environments.
Energy
In power generation, RINGSPANN components are used in pumps, fans and transmission systems. Freewheels and precision couplings contribute to reliable operation.
Automotive
In the automotive industry, RINGSPANN products are used in assembly lines, test benches, machine tools and handling equipment. Precision and repeatability are essential.
Plastics
In the plastics industry, RINGSPANN couplings and connections are applied in extruders, injection molding machines, blow molding machines and recycling equipment. Freewheels prevent reverse rotation in feed systems.
Refrigeration
In refrigeration plants, RINGSPANN components are used in conveyors, lifting systems, pumps and compressors. Ease of maintenance is important.
Sugar
In the sugar industry, RINGSPANN products are used in cane mills, conveyors, pumps and process equipment. Shaft-hub connections and torque limiters withstand heavy loads and humid environments.
How to choose the correct RINGSPANN
Selecting the appropriate RINGSPANN component requires considering several technical factors. Below are the main criteria:
Load and torque
For shaft-hub connections and torque limiters, it is essential to know the torque to be transmitted and the axial and radial loads. RINGSPANN offers selection tables according to shaft diameter and admissible torque. Always verify that the chosen component exceeds the maximum torque of the application with a safety margin.
Rotation speed
In couplings and freewheels, the maximum admissible speed is critical data. Metal bellows couplings, for example, withstand high speeds, but must be correctly aligned. Freewheels have speed limits depending on size and execution.
Sealing and environment
If the application is exposed to dust, moisture or chemical agents, it is necessary to choose variants with suitable seals. The data sheet for each code indicates the executions intended for aggressive environments.
Backlash and precision
In positioning applications, such as servomotors or encoders, the angular backlash of the coupling must be minimal. RINGSPANN metal bellows couplings offer torsional rigidity and zero backlash, ideal for these cases.
Assembly and disassembly
RINGSPANN shaft-hub connections allow quick assembly and disassembly without damaging the shaft. Consult the code data sheet for the disassembly procedure and verify the space for access to the screws.
Equivalences and interchangeability
If you have a component from another brand or an unidentified part, we can help you find the equivalent RINGSPANN according to dimensions and technical specifications.
To request an equivalence, send via WhatsApp or email the code of the original part, the main measurements (shaft diameter, outer diameter, width) and a photo if possible. Our technical team will compare the characteristics and recommend the most suitable RINGSPANN model.
Frequent errors when replacing or buying RINGSPANN
When buying RINGSPANN spare parts, it is common to make mistakes that can affect equipment operation. Below are the most frequent ones and how to avoid them:
Not verifying the complete code
Many RINGSPANN codes have suffixes that indicate important variants. For example, 4200-014301-000000 and 4200-014301-C00000 may differ in execution. Always copy the complete code from the part or drawing.
Confusing similar series
Series with close numbering may correspond to different products (shaft-hub connections, precision clamping systems, couplings). Verify the subcategory and dimensions before ordering.
Ignoring admissible torque
Choosing a torque limiter or shaft-hub connection with insufficient torque can cause slipping or breakage. Calculate the maximum torque of the application and select with a margin.
Not considering the environment
If the equipment works in corrosive or dusty environments, it is necessary to choose variants with special seals or treatments. A standard component may fail prematurely.
Assembly, lubrication and maintenance
Correct assembly and maintenance of RINGSPANN components is essential for their service life and performance. Below are general recommendations:
Assembly of shaft-hub connections
Before mounting, carefully clean the shaft and hub, removing burrs and rust. Follow the manufacturer's instructions on the condition of the contact surfaces (in friction connections they usually must be clean and grease-free) and on screw lubrication. Tighten the screws progressively and in sequence, in successive steps, until reaching the torque indicated by the manufacturer. Do not exceed the maximum torque.
Lubrication of freewheels
The lubrication of RINGSPANN freewheels depends on the series and the application (grease or oil). Use the lubricant indicated in the code's technical data sheet and avoid excess, which can generate heating.
Maintenance of couplings
Metal bellows couplings do not require lubrication, but must be inspected periodically to detect cracks or wear. Verify shaft alignment; excessive misalignment reduces the service life of the bellows. Pin and bush couplings may require replacement of the elastomeric bushes when they wear out.
Inspection of torque limiters
After an overload actuation, verify that the limiter has not suffered damage and that the torque setting is still correct. Some models require manual reset; follow the manufacturer's instructions.
Why get a RINGSPANN quote at MR Accesorios Industriales
MR Accesorios Industriales is exclusive representative of RINGSPANN in Argentina, with specialized technical advice. We have worked with Argentine industry since 1945, offering power transmission solutions.
Our online catalog allows you to search by RINGSPANN code and view each reference. Send us the code, a photo or the measurements via WhatsApp or email and we will quote you promptly.
We are in Buenos Aires, Argentina, and serve customers throughout the country. We sell RINGSPANN products for industries such as metallurgy, agriculture, naval, oil, food, mining, paper, cement, energy, automotive, plastics, refrigeration and sugar.
Get your RINGSPANN quote now: write to us via WhatsApp or email with the code, size or a photo of the part. We will respond promptly.
Frequently asked questions about RINGSPANN
- Where to buy RINGSPANN in Argentina?
- MR Accesorios Industriales is exclusive representative of RINGSPANN in Argentina. You can get a quote via WhatsApp or email by sending the product code or a photo of the part. We are in Buenos Aires and ship throughout the country.
- How to read a RINGSPANN code?
- RINGSPANN codes combine letters and numbers. For example, in 4200-014301-000000, the first block is the series, the second the size and the third the variant. In freewheels, FGR 12 R indicates line, size and variant. If you have doubts, consult us with the complete code.
- What is a RINGSPANN shaft-hub connection?
- It is a fastening element that transmits torque between a shaft and a hub without a keyway, by radial tightening. It is used to mount pulleys, gears or flywheels. RINGSPANN offers shrink discs and conical bushes in several series.
- Does RINGSPANN manufacture couplings?
- Yes, RINGSPANN manufactures metal bellows couplings (SWK, WK, WKE series), pin and bush couplings (REB DCO) and conical couplings (RWK EEO). They are used to connect shafts with or without misalignment, depending on the application.
- What is a RINGSPANN freewheel?
- It is a mechanism that allows rotation in one direction and locks in the opposite. It is used as a backstop, for intermittent feeds or as safety. RINGSPANN offers series such as FGR, SF and BA.
- How to choose a RINGSPANN torque limiter?
- You must know the maximum torque of the application and the shaft diameter. RINGSPANN offers series such as 44xx. Select a limiter with adjustable torque above the working value, but below damage. Consult us with your equipment data.
- Does RINGSPANN have equivalences with other brands?
- If you have a component from another brand, we can help you find the equivalent RINGSPANN according to dimensions and specifications. Send us the code and measurements.
- Is MR an official RINGSPANN distributor?
- MR Accesorios Industriales is exclusive representative of RINGSPANN in Argentina. We sell the brand's products with technical support.
Updated September 29, 2026