ʻO ka helu pololei o ka moʻo TXR(ke kumu maʻamau o ka ʻano lima o ka wili pōlele nut hoʻokahi) ma luna o C5, Ct7 a me Ct10(JIS B 1192-3). E like me ka helu pololei, ʻo ka pāʻani Axial 0.005 (Preload:C5), 0.02(Ct7) a me 0.05mm a i ʻole (Ct10) aia i ka waihona. TXR series (Standard stock of Sleeve type single nut ball screw) of screw shaft screw material S55C (induction hardening), nut material SCM415H (carburizing and hardening), ʻo ka paʻakikī ʻili o ka ʻāpana wili pōleʻa ʻo HRC58 a ʻoi aku paha.