Imishini yokugaya izinsimbi eziyigugu amayunithi lapho inqubo yokwakha insimbi yenzeka khona. Phakathi nale nqubo izinto ezihlukahlukene zensimbi zidlula ngepheya lemiqulu, noma impahla yokubamba impahla. Igama elithi “rolling” lihlukaniswa ngokwezinga lokushisa insimbi iginqika ngalo. Izigayo eziginqayo ze-Goldsmith zisebenza ngokusebenzisa amarola amaningi ukuze alawule izici ezibonakalayo zeshidi lensimbi. Ekwenziweni kwamashidi egolide, banikeza ukujiya okufanayo kanye nokuvumelana kwensimbi yegolide yesiliva yethusi asetshenziswa ngayo. Imishini yegolide inamarola akhama futhi acindezele insimbi yephepha njengoba idlula kuwo.

I-Hasung ihlinzeka ngezinhlobo ezahlukene zemishini yokugaya insimbi, njengomshini wokugoqa wegolide, umshini wocingo nomshini wokugoqa amashidi, umshini wokugaya kagesi kanye nezigayo zokucweba ubucwebe njll,. Izigayo eziginqayo ziyiyunithi lapho izintambo ezinkulu zidlula kumarola amabili anezikhala. Osayizi bezintambo bangenziwa ngokwezifiso ngokuya ngezidingo. Imishini yokudweba ngocingo eneziningi iyafa ngokunciphisa osayizi bezintambo ngamunye ngamunye ngesikhathi. Kusukela ku-8mm wentambo enkulu ukuya kokuncane okungu-0.005mm noma okuncane nakakhulu.

Njengomunye wabakhiqizi bemishini yokugaya izinsimbi eziyigugu , u-Hasung ubambe iqhaza ngokujulile emakethe yomshini wokugaya, futhi uzibophezele ekuhlinzekeni amakhasimende ngezigayo ezisezingeni eliphezulu zokugingqa ubucwebe, imishini yokugingqa igolide neminye imikhiqizo nezinsizakalo.