R+W (Bensenville, Il) has developed a series of couplings for mounting to flange output servo gearheads, The BK8 coupling allows for an equally compact flexible interface between gearheads and driven components, protecting bearings and simplifying alignment.
The BK8 utilizes a stainless steel bellows which allows for a high level of torsional stiffness to be maintained while compensating for small misalignment between the mating components. The coupling is available in sizes covering torque ratings from 15Nm up to 1500Nm and for special applications up to 10,000Nm. It can be made with various coupling output hubs in addition to the traditional clamping hub, such as expanding shafts and tapered conical clamping hubs.
For more info, contact http://info.hotims.com/22908-317