NM coupling ine hubs mbiri uye inochinjika mhete inokwanisa kubhadhara marudzi ese eshaft misalignments. Iyo inochinjika inogadzirwa neNitile rubber (NBR) ine yakakwira yemukati yekunyorovesa hunhu iyo inogonesa kutora uye kuramba kumafuta, tsvina, girisi, mwando, ozone uye akawanda emakemikari zvinonyungudutsa.