RINGSPANN in mining: components for crushers, mills, screens and conveyor belts

RINGSPANN shaft-hub connections are used to fix pulleys, drums, gears or flywheels to shafts of crushers, mills and conveyor belts. They work by friction and avoid machining keyways, which simplifies assembly and reduces stress concentration points. In mining, where starts and stops are abrupt, the connection should be selected according to the torque it must transmit.

To identify them, check the shaft diameter and the hub outer diameter, as well as the torque to be transmitted. Codes such as 1051-018001, 1051-036001 or 1051-054001 correspond to shaft-hub connections. If you have the old part, measure the inner and outer diameter and count the clamping screws. With that data we can quote the replacement.

A common mistake is ordering the connection only by shaft diameter without checking the hub length. If the hub is short, the connection may not transmit the required torque. It is also advisable to check the shaft condition: deep scratches or wear reduce friction capacity. Send us a photo of the part and the dimensions, and we will indicate the correct option.

RINGSPANN couplings are installed between motor and gearbox or between gearbox and equipment to transmit torque between shafts. In crushers and mills, the load peaks generated by material jams must be taken into account. Codes SKDZ 10 and SKDZ 20 are examples of RINGSPANN couplings.

To order a coupling, you need the diameter of the shafts to be connected, the distance between shaft ends and the torque to be transmitted. It is also useful to know whether the coupling works outdoors or with dust present, because it may require a special version. If you have the engraved code, such as RDA 0042 ESO, even better: with that we quote exactly.

A frequent mistake is choosing a coupling only by shaft diameter without considering peak torque. In mining, full-load starts generate peaks that can exceed nominal torque. Also check the condition of the hubs and the alignment of the shafts before ordering spare parts.

RINGSPANN freewheels allow rotation in one direction and lock in the opposite direction. In mining they are used in inclined conveyor belts to prevent load backrunning if power is cut, and in bucket elevators as a backstop system. Codes FN 8, FB 72 and FB 37 are examples of RINGSPANN freewheels.

To quote a freewheel, you need the shaft diameter, the torque to be transmitted and the free rotation direction. If the freewheel is mounted on a shaft with a keyway, check the width and depth of the keyway. In many cases, the code is engraved on the side face, such as FN 8 or FB 72. If it cannot be read, measure the inner and outer diameter and count the internal rollers or cams.

A common mistake is not considering the working conditions: temperature, dust and lubrication influence the choice, so let us know where it will be mounted. Send us the code or the dimensions and we will quote the right freewheel.

RINGSPANN precision clamping systems fix components to shafts with precision. In vibrating screens, attention must be paid to the fixing, because constant vibrations require a well-resolved connection. Codes BKDF 6, BKDF 7 and BKDI 6 are examples of RINGSPANN precision clamping systems.

To order a clamping system, measure the shaft diameter and the inner diameter of the component to be fixed. It is also useful to know the component width and the torque to be transmitted. If you have the engraved code, such as BKDF 6, send it to us and we quote exactly. For screens, tell us that the equipment is vibrating.

A frequent mistake is reusing a clamping system after forced disassembly: it is advisable to check its condition before remounting and to respect the tightening torque indicated by the manufacturer. If in doubt, consult us with a photo of the part.

RINGSPANN torque limiters protect the drive against load peaks that can break shafts, couplings or gears. In mills and crushers, where a material jam generates torque far above nominal, the limiter prevents that torque from reaching the rest of the drive. Codes PA 20, PA 12 and PA 30 are examples of RINGSPANN torque limiters.

To quote a torque limiter, you need the desired release torque, the diameter of the shafts to be connected and the mounting type. It is also useful to know whether the limiter should reconnect automatically or requires manual reset. If you have the engraved code, such as PA 20, send it to us and we quote exactly. In mining, the limiter commonly works with dust and humidity, so it is advisable to verify the degree of protection.

A common mistake is setting the limiter to a very high torque to avoid frequent releases. That cancels the protection and shifts the problem to another component. The condition of the limiter should be checked periodically. Send us a photo and the motor nameplate data, and we will help you choose the correct limiter.

The RINGSPANN line also includes remote control systems for drives. In mining, remote operation is useful in equipment where manual intervention with the machine running should be avoided.

To order a remote control system, you need to know which equipment you will control and under what conditions it works. If you have the code engraved on the current component, send it to us and we quote exactly.

A frequent mistake is ordering without having the equipment data on hand. Send us a photo, the nameplate data and the code if you have it, and we will help you identify the right option.

RINGSPANN cardan shafts transmit torque between shafts that are not aligned, as in conveyor belt drives with the motor separate from the gearbox. They allow working angles between shafts. In mining, they are also used in pumps and fans. RINGSPANN industrial brakes, in turn, stop or hold loads on belts and other drives.

To quote a cardan shaft, you need the length between universal joint centers, the shaft diameter and the torque to be transmitted. It is also useful to know the maximum working angle and whether the shaft works outdoors. For industrial brakes, you need the braking torque, the disc or drum diameter and the supply voltage. If you have the engraved code, send it to us and we quote exactly.

A common mistake with cardan shafts is not lubricating the universal joints with the right grease, which shortens service life. With brakes, it is common not to check pad or shoe wear, which reduces braking torque. Send us a photo of the part and the nameplate data, and we will quote the correct spare part.