Njengecandelo lokukhutshwa kwamandla okuhambisa, i-pulley yokuqhuba ihlulwe ibe ziindidi ezimbini: I-Smooth surface kunye ne-rubber coated surface pulley.Ngaphantsi kwemeko yamandla aphantsi kunye nobushushu obuncinci be-ambient, i-pulley yomhlaba egudileyo ingasetyenziswa.Kwimeko yokusingqongileyo okumanzi, amandla aphezulu kunye ne-slippage elula, i-pulley efakwe irabha kufuneka isetyenziswe.