Straksa: Insait na ausait ring bilong wanpela 'spherical plain bearing' i gat 'spherical' seip, na ol i konektim wantaim ol 'steel ball' na wanpela 'cage'. Sferik disain bilong tupela ring i mekim na bearing i ken stret long olgeta hap.
Wok Prinsipel: Taim ol fos bilong ausait i wok long 'spherical bearing', ol 'steel ball' namel long insait na ausait ring i save karim hevi, na dispela i mekim na bearing inap long sanap strong long ol 'radial' na 'axial' fos. Long wankain taim, ol sferik pes bilong insait na ausait ring i larim bearing long self-align, na daunim friksen na wear taim wok.