Kusungwa kwakapararira kwakakosha kwekusimudza zvinhu zvakapera. Iwo akasiyana ekumanikidza simba zera nzira dzinogona kukamurwa muzvikamu zvitatu: lever inosunga, eccentric zvisungo uye zvimwe zvinofambiswa zvisungo.
Iko kusungira simba kweiyo lever kiramba inogadzirwa nehuremu hwechinhu pachayo kuburikidza nesimboti reiyo. Naizvozvo, kana chinhambwe cheshaya chakaramba chiripo, simba rekuchinjisa rakaenzana nehuremu hwakafa hwechinhu chakarembera, kuitira kuti nhumbi dzisungwe zvakavimbika.
Iko kusungira simba kweiyo eccentric kirampini inogadzirwa neiye wega-huremu hwechinhu kuburikidza neyawe wega-yekuvharira chiito pakati pe eccentric block uye izvo zvinhu.
Iko kusungira simba kweimwe chinosungirwa chinogadzirwa neyakagadziriswa screw nechisimba chekunze, uye haina chekuita nehuremu uye saizi yechinhu.
