Wok prinsipol blong ol sferik plein bearing i stanap long spesel disaen blong strakja blong olgeta. Long rot bilong wok bung bilong ausait slev, insait slev, na bal asembli, ol i winim wanpela balens namel long lod-i kisim kapasiti na fleksibiliti.
Long ol masin, planti taim ol i save yusim ol sferik plein bearing bilong sanap strong long ol kompleks lod na muvmen, olsem long ol sistem bilong saspensen bilong taia. Ol i save givim strongpela lod-}aring strong na long wankain taim ol i sakim tu senis, les, na tensen.
Antap long dispela, ol i save yusim ol sferik plein bearing long ol kain kain mekanik kontrol sistem, olsem ol ensin mekanik kontrol na ol shaft bilong draivim kar. Resonal disain bilong ol i daunim tru senis na nois, na mekim gut moa, gutpela moa, sef, na moa gutpela wok bilong mekanik operesen.
