Servoflex
Miki Pulley’s metal disc couplings are available in aluminum and steel, with the discs always made of stainless steel. They are designed for high speed and accurate position applications due to their combination of high torsional stiffness with a very low reaction force.
All disc couplings are available in single or double flex version. The single flex version is extremely strong in torsional stiffness, as the double flex models are very capable to absorb all kind of misalignments of the shafts to be connected.
In aluminum, we offer the SFC series, which is designed for torque from 0.25 Nm up to 250 Nm. Steel couplings such as the SFM can operate at up to 20,000 rpm while transmitting an enormous torque of 600 Nm. The SFH high-performance coupling transmits up to 8000 Nm with very high rigidity.
What are disc couplings and what is their function?
Disc couplings are mechanical components made of steel, aluminum or stainless steel to connect two shafts and transmit power from the input side to the output side. At the same time, they can compensate axial, parallel and lateral misalignments of the two shafts. They are a widely used design of couplings, which is becoming increasingly important in power transmission applications.
Disc couplings consist of two coupling hubs with one or two sets of discs between them. The discs are stainless steel elements that provide a certain flexibility of the coupling and allow misalignment compensation between two shafts.
What advantages do disc couplings have over other types of couplings?
The technological development approach for servo disc couplings was to combine a high degree of compensation for shaft misalignments with the lowest possible reaction force. In the case of shaft connections between the input and output sides, it is of the utmost importance to be able to compensate for misalignments that occur, but at the same time to protect the bearings of the connected shafts by applying the lowest possible reaction forces. These drive technology machine elements are completely without wear.
Single-cardanic and double-cardanic designs allow servo disc couplings to be adapted to the required conditions. The so-called Singleflex design impresses with its extremely high torsional stiffness with the possibility of compensating for certain angular errors. The Doubelflex series achieves very high misalignment possibilities with axial and parallel misalignments. Another advantage of the Servoflex series is the easy assembly and disassembly via clamping hubs, which greatly simplifies the replacement of surrounding components. On some models, it is even possible to replace the disk packs without having to disassemble the coupling hubs (e.g., model SFS or SFH).
Why are disc couplings maintenance-free?
Since disc couplings do not have any intended wearing parts such as jaw couplings, they are completely maintenance-free. Due to the alternately bolted structure, no relevant wear is noticeable during operation. Therefore, they are declared as “Maintenance-Free” or wear-free products.
What are the mounting options for disc couplings?
Depending on the model, our disc couplings offer a variety of mounting options to the machinery, which vary depending on the desired torque transmission. In addition to clamping hubs, set screws or conical clamping hubs, there is also the option of selecting a flange as a connection option for the SFF model.
In our torque transmission testing, a sufficient safety factor is applied so that when the specified rated torque is used, there will be no slippage of the connection due to the connection method. In addition, a keyway can be machined into the clamping hub on our SFC model.
Here is an overview of the different mounting options per model:
Clamping hub: SFC, SFF, SFM
Clamping hub with keyway: SFC
Set screw: SFS, SFH
Conical clamping hub: SFC, SFS, SFF, SFM, SFH
Flange: SFF
Floating shaft coupling: SFH (G)
Where are disc couplings used?
It is impossible to imagine the field of mechanical drive technology without disc couplings and they are suitable for drives of all types. They are used in all kinds of industries such as robotics, medical technology, toolmaking or automation. Disc couplings are used particularly for servo drives or in mechanical engineering.
Do you need more information or detailed advice on your application? Then please do not hesitate to contact us. We are looking forward to your request!
