Mefuta ea lisebelisoareducer worm gear reducer ke mochine oa phetisetso ea matla o sebelisang mochini o fetolelang lebelo la gear ho theola palo ea liphetohelo tsa koloi palo e hlokahalang ea liphetohelo le ho fumana mochini o moholo oa torque. Mocheng o sebelisoang ho fetisa matla le ho sisinyeha, mefuta e mengata ea tšebeliso ea lisebelisoa e pharalletse haholo. Mekhoa ea eona e ka bonoa tsamaisong ea phetisetso ea mefuta eohle ea mechine ho tloha likepeng likoloi tsa likoloi mechine e boima bakeng sa ho haha, ho sebetsa mechine le lisebelisoa tsa tlhahiso ea othomathike tse sebelisoang indastering ea mechine ho ea ho lisebelisoa tse tloaelehileng tsa malapa lioacheng tsa bophelo ba letsatsi le letsatsi joalo-joalo. ho bonoa ho tloha phetisong ea matla a maholo ho isa phetisong ea meroalo e menyane le angle e nepahetseng. Lits'ebetsong tsa indasteri, sesebelisoa se na le mesebetsi ea ho fokotseha le ho eketseha ha torque. Ka hona, e sebelisoa haholo lisebelisoa tsa ho fetola lebelo le torque.

E le ho ntlafatsa katleho eathepa ea liboko lisebelisoa tse fokotsang, tse senang ferrous hangata li sebelisoa e le lisebelisoa tsa liboko le tšepe e thata joalo ka moqomo oa liboko. Hobane ke sliding friction drive, nakong ea ts'ebetso, e tla hlahisa mocheso o phahameng, o etsang likarolo tsa mochine o fokotsang le ho tiisa. Ho na le phapang pakeng tsa ho atolosoa ha mocheso pakeng tsa bona, ho fella ka lekhalo pakeng tsa sebaka se seng le se seng sa ho tlolelana ha metsi, 'me oli e fetoha e fokolang ka lebaka la ho eketseha ha mocheso, ho leng bonolo ho baka ho lutla. Ho na le mabaka a mane a mantlha, e 'ngoe ke hore na ho tsamaisana ha thepa hoa utloahala, e' ngoe ke boleng ba bokaholimo ba meshing friction, ea boraro ke khetho ea oli e tlotsang, hore na palo ea tlatsetso e nepahetse, 'me ea bone ke boleng ba kopano le tikoloho ya tshebediso.