Ukugaya inqwelomoya yeyona ixhaphakileyo yemisebenzi yokugaya. Yinkqubo yokugqitywa esebenzisa ivili elijikelezayo lokugudisa umphezulu weflethi ye-metric okanye izixhobo ezingekhoyo ukuze azinike inkangeleko ehlaziyiweyo ngokususa i-oxidey kunye nokungcola kwisiqwengana somgangatho. Oku kuya kuthatha indawo enqwenelekayo ngenjongo yokusebenza.
I-grinder yomphezulu sisixhobo somatshini esisetyenziselwa ukubonelela ngezinto zomhlaba zokuchaneka, nokuba kubungakanani obukhulu okanye ukugqiba umphezulu.
Ukuchaneka kwesiqhelo kwe-grinder engaphezulu kuxhomekeke kuhlobo kunye nokusetyenziswa, nangona kunjalo ± 0.002 mm (± 0.0001 kwi) kufuneka zifezekiswe kwi-grinders ephezulu.