Ƙwallon ƙwallon ƙafa mai zurfi (GB/T 276 - 2003) wanda aka fi sani da lakabi ɗaya na tsakiya na ƙwallon ƙafa, shine nau'in mirgina da aka fi amfani dashi.Siffofinsa sune ƙananan juriya na juriya, babban gudu, ana iya amfani da su don ɗaukar nauyin radial ko radial da axial haɗaɗɗen nauyin a kan sassan, kuma ana iya amfani da su don ɗaukar nauyin axial akan sassa, kamar ƙananan motoci, mota da tarakta gearboxes. , Akwatunan kayan aiki na kayan aiki, injina gabaɗaya, kayan aiki, da sauransu.