The MAX-C® resilient coupling is available in three styles-K2, WB and CB. Fourth style-UB (urethane cylindrical block design) has been superseded by the K2, but is still available for sale.
K2: Urethane wedge shaped blocks. Used on electric motor driving cranes, pumps, feed rolls, fans, conveyors bow thruster, manipulators, etc.
WB: Rubber block in wedge shape. The rubber blocks come in various shore hardness and are typically custom-engineered for an application. They are used on synchronous and variable frequency motors driving compressors, kiln drives, steel mill main drives, crushers, ID and FD fans. These come in a wide range of sizes and torque capacity.
CB: Rubber blocks are cylindrical shape. Also available in various hardness, like the WB design. They are primarily used in diesel engines driving generator sets, fire pumps, torque converters, marine drives, drill rigs, main propulsion, etc. They are also available in various sizes and torque ranges, typically custom-engineered.