Flexible coupling: elastomer coupling
Rimtec

Zero-backlash servo insert couplings compensate for the misalignment that is possible with high load inertias or the fast accelerations of today’s high-performance digital and analog servo and vector drives.

Designed with special polyurethane inserts to dampen harmful vibrations, the couplings provide backlash-free power transmission with a high torsonial stiffness. Three insert options are offered to cover a full range of resonance frequency problems.

Compensate for axial, radial and angular misalignment
Available with electrically insulated collet or conical clamping hubs
Delivered completely assembled to install as a single unit or blind assembly
Can be disassembled to fit tight installations
Ease of maintenance due to changing insert only -- cost effective
Custom sizes may be special ordered