Ngwakọta skru nke nwere ogbo abụọ na-egosi oyi dị n'etiti mgbe a gbasịrị ogbo mbụ na mkpakọ nke ogbo nke abụọ, nke na-eme ka nkesa nkesa mkpakọ dịkwuo mma. Nke a na-azọpụta ike karịa 8%-15% karịa ngwa nrụpụta otu ogbo, na-ejigide ọkwa arụmọrụ ike kachasị elu.
Mkpakọ nke ọkwa abụọ ahụ na-ebelata oke nrụgide nke ọkwa ọ bụla, na-eme ka okpomọkụ ikuku na-ebelata ma belata ibu na bearings compressor. Nke a na-eme ka ọrụ kwụsiri ike ma bụrụ nke a pụrụ ịtụkwasị obi na-aga n'ihu n'ọnọdụ ihu igwe niile.