1. Jagoran Juyawa: Ko famfo yana jujjuya agogon agogo ko counterclockwise lokacin da aka duba shi daga ƙarshen motar (tsarin ɗakin famfo yana da hannu a nan).

Daga gefen motar: idan famfo yana jujjuya agogon agogo baya, mashigar famfo tana gefen hagu kuma tashar tana kan dama; idan famfo yana jujjuya agogon agogo, mashigar famfo tana hannun dama sannan mashin ɗin yana gefen hagu.

2. Siffan rufewa:tsaga harka famfoshi ne hatimin tattarawa, hatimin shiryawa mai laushi ko hatimin injina.

3. Hanyar lubrication bearing: ko da tsaga harka famfo shi ne mai maiko ko siriri mai lubrication. (dukkan famfo mai tsaga a cikin kamfaninmu sun yi alama hanyar lubrication).