Kubadaha KGG waxay ka kooban yihiin giraanta dibadda, giraan gudaha ah, iyo tiro badan oo rollers iyo spacers. Xadhkaha oo leh saxan-wareejin sare oo awood u leh inuu qaado culayska dhinac kasta. Sababtoo ah waxay leedahay rollers cylindrical orthogonally habaysan, waxay qaadi kartaa culaysyo dhan walba ah. KGG waxay bixisaa laba nooc oo xajisyo: Deep Groove Ball Bearing iyo Kubbada Xidhiidhka Xaglaha.