I-Rigid Couplings (i-RM Couplings) kunye ne-Taper Bore bush ibonelela abasebenzisi ngokukhawuleza nangokulula ukulungiswa kweeshafti ezidibanisa ngokungqongqo kunye ne-convience yokhetho olubanzi lweesayizi ze-shaft ze-Taper Bore. I-flange yendoda ingaba nehlathi elifakwe kwicala le-Hub (H) okanye ukusuka kwicala leFlange (F). Imazi isoloko inehlathi elilingana no-F elinika iindidi ezimbini zokudityaniswa kokudibanisa i-HF kunye ne-FF. Xa usebenzisa kwi-shafts ethe tye, khetha eyona ndibano ifanelekileyo.