Rheine plant The couplings made by RENK are used in all industrial fields of application. The range of the RENK plant in Rheine includes curved-tooth couplings, hight speed diaphragm and RAFLEX flexible disk couplings, HYGUARD safety couplings and TORLOC clamping elements as well as curved-tooth articulated spindles torques from 21 - 1500 kNm.