Ili ndi mawonekedwe a mtengo wotsika, mayendedwe amanjenjemera, phokoso lotsika, ndipo palibe chifukwa chowonjezera mafuta opaka mafuta munthawi yogwira ntchito. Ndioyenera makamaka malo ogwirira ntchito omwe siophweka kuti azipaka mafuta kapena osaloledwa kukhala odetsedwa ndi mafuta.Chikondwerero ndi gawo lofunikira pakubala mafuta.Mafuta okhala ndi mafuta othamanga kwambiri komanso opepuka amafunikira mafuta ambiri komanso porosity yayikulu Kupaka mafuta kumagwira ntchito mwachangu komanso pansi pa katundu wambiri kumafunikira mphamvu yayitali komanso porosity yotsika.Mtundu uwu wonyamula udapangidwa koyambirira kwa zaka za zana la 20. Chifukwa cha kupanga kwake kotsika komanso kugwiritsa ntchito bwino, wakhala akugwiritsidwa ntchito kwambiri. Lakhala gawo lofunikira kwambiri pakukula kwa zinthu zosiyanasiyana zamafakitale monga magalimoto, zida zapanyumba, zida zomvera, zida zakuofesi, makina azolima komanso makina olondola.Oily bearing imagawidwa pamkuwa, chitsulo, chitsulo chamkuwa, etc.

Pogwiritsa ntchito mawonekedwe ophatikizika a mafutawo kapena mawonekedwe oyandikana ndi mafuta opaka mafuta, musanakhazikitse ndikugwiritsa ntchito chitsamba chonyamula, mafuta opaka mafuta amatha kulowetsedwa muzitsamba, ndipo kunyamula kumatha kuchitidwa popanda kapena mafuta opaka mafuta nthawi yayitali panthawi yogwira ntchito. Mtundu wonyamula uwu umadziwika kuti ndi wothira mafuta.Mafuta onyamula osagwira ntchito, mafuta odzoza amakhala ndi ma pores ake, kuthamanga, kusinthasintha kwa shaft chifukwa cha kukangana ndi kutentha, komwe kumakulitsa kukula kwa matenthedwe kuti muchepetse pores, kuti kutsinde kutasiya kuzungulira, chitsamba chonyamula chimazizira, ma pores abwezeretsedwanso, ndipo mafuta opaka mafuta amayambiranso mu ma pores.

Ngakhale ndizotheka kuti mafuta okhala ndi mafuta apange filimu yathunthu yamafuta, nthawi zambiri, mtundu uwu wonyamula umakhala mu mkangano wosakanikirana wamafilimu osakwanira amafuta. Kupanga mafuta odzaza ndi ma pores ndi awa: matabwa, chitsulo chosungunuka, zotayidwa ndi mkuwa ndi ufa wazitsulo; Zambiri mwazinthu zonyamula mafuta ndizopukusira, monga mafuta okhala ndi phenolic resin. Mfundo yogwirira ntchito yothandizira mafuta.