Ana amfani da na'ura mai ɗorewa don yin insulating conductors.Wannan injin ya dace da kaset ɗin da aka yi da kayan daban-daban, kamar takarda, polyester, NOMEX da mica.Tare da shekaru na gwaninta akan ƙirar mashin ɗin kwance a kwance da masana'anta, mun haɓaka na'urar buɗaɗɗen sabon injin tare da halayen inganci mai girma da saurin jujjuyawa har zuwa 1000 rpm.