Profile: Rydon Group provides sprockets, couplings, and compressor pumps. We are an ISO 9001:2008 certified company. We are specialized in standard and custom-made sprocket/chain drive systems such as standard automobile sprockets and special industrial sprockets with finish bore/stock bore. Flexible couplings are devices that are designed to connect two shafts together and transmit torque while permitting some radial, axial, and angular misalignment.