Kulumikiza kwa NM kumakhala ndi ma hubs awiri ndi mphete yosinthika yomwe imatha kubweza mitundu yonse ya kusalongosoka kwa shaft. Ma flexiblerings amapangidwa ndi mphira wa Nitile (NBR) omwe ali ndi mawonekedwe apamwamba amkati omwe amatha kuyamwa ndi kukana mafuta, dothi, mafuta, chinyezi, ozoni ndi zosungunulira zambiri zamakina.