The Max-C® K2 resilient coupling has high power ratings and a large bore capacity, allowing it to be used in virtually any difficult installation. Max-C® K2 couplings can also be used as a non-lubricated replacement for many gear couplings in heavy-duty service. For smaller sizes or less demanding service, consider a Max-C® UB coupling. The MC elastomer block used in the K2 coupling is specially compounded for high strength, exceeding the capability of normal rubber block couplings. This combination of strength and resilience allows the K2 coupling to be successfully applied to equipment with torque reversals, high momentary torques, start and stop operation and impact and shock loading. Kop-Flex® Max-C® K2 Resilient Coupling, Finished Bore, 6-3/4 in Flex/9-3/4 in Rigid Bore, 18 in OD, 12-1/4 in Overall Length, Flex/Rigid Hub, 15.94 in Dia Flex/14 in Dia Rigid Hub, 5.88 in Flex/6.25 in Rigid Length Through Bore, 265000 in-lb Continuous/530000 in-lb Peak Torque, 3180 RPM Balanced/2120 RPM Not Balanced Maximum