Ifomula kamanyolo yakhiwa ikakhulukazi umanyolo we-inorganic, umanyolo we-organic, amaminerali nokunye.Umanyolo we-inorganic kumanyolo oyinhlanganisela, njenge-urea ugqwala esikhunjeni sendandatho, imbobo yokufa eyindandatho kanye nembobo yekhoni yangaphakathi kugqokwa kanzima amaminerali, ngakho-ke impahla yesikhunta esiyindandatho kufanele kukhethwe insimbi engagqwali X46Cr13.Imbobo yendandatho kamanyolo ehlanganisiwe ngokuvamile inkulu, ibanga phakathi kuka-3.0-6.0mm, ngenxa ye-coefficient enkulu yokungqubuzana, umgodi kunzima ukuwukhipha.