Mechini ea lijo-thollo e sebelisoa tlhahisong ea lijo tsa liphoofolo ho lokisa lijo-thollo le lisebelisoa tse ling ho li fepa.Li-feed rolls ke karolo ea bohlokoa ea mochini o pshatlang, o silang le ho kopanya metsoako ea phepelo.
Lirolara li sebelisa khatello le matla a ho kuta ho pshatla lisebelisoa tsa phepelo.Li ka ba le libopeho tse fapaneng tsa bokaholimo le boholo ba lekhalo ho latela boholo bo hlokahalang ba phepelo e felileng.Mefuta e tloaelehileng ea lirolara e kenyelletsa lirolara tse phalang, lirolara tse boreleli, le lirolara tse nang le masenke.
Lirolara tsa phepelo hangata li entsoe ka li-alloys tsa tšepe tse thata ho mamella matla le ho roala ho amehang ts'ebetsong ea phepelo.Lirolara li khannoa ke li-motor le li-gearbox ka lebelo le fapaneng ho tsamaisa phepelo ka mochini.
Sebaka pakeng tsa lirolara se ka fetoloa ho fihlela phokotso ea boholo bo lakatsehang ea metsoako ea phepelo.Hangata lirolara li kopanngoa le limakenete, li-sieve le likarolo tse ling ho tlosa litšila tsa tšepe le ho arola likaroloana.
Moralo o nepahetseng oa lirolara, lebelo, le li-setting tsa lekhalo li bohlokoa bakeng sa ho fihlela litefiso tsa ho feta, tšebeliso e tlase ea matla, le boleng bo nepahetseng ba phepo ho latela boholo ba likaroloana, ho tsoakana le ho tšoarella ha pellet.Tlhokomelo ea kamehla ea li-roller le eona ke ea bohlokoa.