Product Description Cone Ring flexible coupling, 1. The coupling consists of 2 hubs: One pin hub with the corresponding pins and a bush hub. 2. The torque is transmitted via the steel pins with their taper elastomer rings and the corresponding bores        in  the bush hub. 3. The couping is maintenance-free an is used in … Continue reading China best Mc120 Cone Ring Pin & Bush Pumps Couplings