NB Ball Splines have no backlash because precisely ground (not drawn) raceways conform to the shape of the ball in the nut and shaft so opposing raceways have the same angles of contact. The spline shaft is straighter than the competition's – eliminating rotational vibration. Endlessly adaptable to high-load linear motions. 16 standard and customizable shaft sizes with diameters from 4mm to 100mm. 7 different nut styles.