We realize from existence of the coupling:
The Tire and Pneumatic Couplings (TPC) are intended for connection and dissociation as on the run, and during stops of the rotating shaft of transmissions of the drilling rig. Couplings provide a possibility of remote turning on of the mechanism, to mitigation of blows at inclusion and during the work, and compensate small distortions and not coaxialities of the connected shaft started at installation.
Applied in the ShPM drilling rigs are flexible coupling frictional couplings of blooming type with removable rubber cylinders.
Production has a warranty of manufacturer. The prices are lower than factory. Contractual price depending on conditions and quantity.