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Servo couplings

General

Definition - servo couplings:
Servo couplings are compensating couplings with a backlash free and conformal torque transfer providing high torsional stiffness and a low moment of inertia. According to these requirements, JAKOB metal bellow couplings can be regarded as the ideal solution. For more than 25 years, they have proven themselves in thousands of servo drives as being excellent. Elastomer couplings with a flexible polyurethan-spider can also represent a per- fect alternative for different applications because of their product-specific advantages. All JAKOB servo couplings have one thing in common, they are all backlash free (also shaft-hub-connection) and flexible to allow the com- pensation of shaft misalignments. Because of the unique characteristics of the different series, the designer will (almost) always find the best solution within the large-scale JAKOB coupling program. The area of application ranges from highly dynamic feed drives of the axis in machine tools to high performance drives in the general machine tool design. Characteristics - JAKOB servo couplings: • absolut backlash free, exact torque transfer • low moment of inertia - high balancing quality • excellent operational characteristics - high speed • compensation of shaft misalignments - low restoring forces • frictional, easy to fit shaft-hub-connection • metal bellow: max. torsional rigidity, wear free, up to 300°C • elastomer spider: plug-in, oscillation dampening, up to 120°C • compact - flexible areas of applications • large number of types and sizes available (modular system) • precise production - best quality - long life timeThe JAKOB modular system:
As flexible compensating parts, stainless steel bellows are used in different forms as well as polyurethan spiderswith different shore hardnesses, oldham- type spacer as polyacetal and stainless steel membran hubs. Another important aspect is the kind of connection between the driven shafts resp. primary shafts and the coupling hubs. Several versions of backlash free frictional clamping hubs or conical hubs are available. In the following, the most important and widely used series of compensating elements and kinds of hubs, deriving from the numerous possibilities of combinations, are described in this catalogue. Awell-contrived modu- lar system, which provides multiple use of many parts, enables a production in cost-effective batch sizes and very short delivery times. The JAKOB coupling program is devided into the following four main groups: • Metal bellow couplings• Elastomer couplings • Miniature couplings • Distance couplings with intermediate pipe
For decades, the centre of theJAKOB coupling program has been a big variety of different metal bellow couplings. Servocouplings www.jakobantriebstechnik.de Tel. 06022 2208-0 Fax 06022 220822

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